CN112201879A

CN112201879A - Heating control method and device for battery pack and electronic equipment

Info

Publication number: CN112201879A
Application number: CN202010960414.4A
Authority: CN
Inventors: 孙欣阳
Original assignee: Evergrande New Energy Automobile Investment Holding Group Co Ltd
Current assignee: Evergrande New Energy Automobile Investment Holding Group Co Ltd
Priority date: 2020-09-14
Filing date: 2020-09-14
Publication date: 2021-01-08
Anticipated expiration: 2040-09-14
Also published as: WO2022052762A1; CN112201879B

Abstract

The embodiment of the invention discloses a heating control method and device for a battery pack and electronic equipment, wherein the method comprises the following steps: under the condition that a heating request for a battery pack is received, acquiring the current ambient temperature of the battery pack and the current first power of a heater; determining target power corresponding to the ambient temperature and the first power, a target opening value of a water mixing valve and target control time based on a pre-constructed corresponding relation; and controlling the heater to convert the first power into the target power within the target control time, and controlling the opening degree value of the water mixing valve to reach the target opening degree value within the target control time. Therefore, the heater and the water mixing valve are controlled within the target control time, the battery pack can be heated under the condition that the temperature fluctuation of the cabin except the battery pack in the object heated by the heater is not caused to be within the preset fluctuation range, and the control accuracy is improved.

Description

Heating control method and device for battery pack and electronic equipment

Technical Field

The invention relates to the technical field of computers, in particular to a heating control method and device for a battery pack and electronic equipment.

Background

With the increasing popularization of electric vehicles, how to accurately perform heating control on a battery pack in the electric vehicle becomes a focus of attention of electric vehicle manufacturers.

At present, a heater may be controlled to heat a battery pack of an electric vehicle by a closed-loop control method, for example, when a battery thermal management system receives a heating request for the battery pack, the battery thermal management system may obtain real-time power of the heater, a real-time temperature value of the battery pack, and a preset target temperature that needs to be reached by the battery pack corresponding to the heating request, and adjust power of the heater by a preset control algorithm (e.g., a PID algorithm) to make the temperature of the battery pack reach the target temperature.

However, the closed-loop control method needs to adjust the power of the heater through the real-time feedback value of the battery pack, and in the process of power adjustment, since heating the battery pack causes the indoor temperature of the passenger compartment sharing one heater with the battery pack to decrease, and after the temperature control system of the passenger compartment detects the decrease of the indoor temperature of the passenger compartment, the temperature control system of the passenger compartment also takes measures for increasing the power of the heater, which may cause the electric heating management system and the temperature control system of the passenger compartment to simultaneously adjust the power of the heater, possibly causing problems such as overhigh power of the adjusted heater, even causing safety problems such as overhigh temperature of the battery pack, overlarge temperature difference and the like, so the control method has the problem of poor control accuracy.

Disclosure of Invention

The embodiment of the invention aims to provide a heating control method and device for a battery pack and electronic equipment, and aims to solve the problem of poor control accuracy in the prior art when the battery pack is heated.

To solve the above technical problem, the embodiment of the present invention is implemented as follows:

in a first aspect, an embodiment of the present invention provides a method for controlling heating of a battery pack, where the method includes:

under the condition that a heating request for a battery pack is received, acquiring the current ambient temperature of the battery pack and the current first power of a heater;

determining a target power, a target opening value of a water mixing valve and a target control time corresponding to the ambient temperature and the first power based on a pre-constructed corresponding relationship, wherein the corresponding relationship is the corresponding relationship among the ambient temperature, the first power, the target opening value and the target control time determined based on historical detection data, and the target power is the power which is used for enabling the temperature of the battery pack to reach a stable state and does not cause the temperature fluctuation of cabins except the battery pack in an object heated by the heater to exceed a preset fluctuation range;

And controlling the heater to convert the first power into the target power within the target control time, and controlling the opening value of the water mixing valve to reach the target opening value within the target control time, so as to heat the battery pack under the condition that the temperature fluctuation of the cabin except the battery pack in the object heated by the heater is within the preset fluctuation range.

Optionally, the method further comprises:

and under the condition that the average temperature of the battery modules in the battery pack is detected to reach a preset target temperature, the heater is controlled to be converted from the target power to the first power within the target control time, and the opening value of the water mixing valve is controlled to be converted from the target opening value to a preset opening value within the target control time.

Optionally, the method further comprises:

in the presence of one or more of the following: and when receiving a fault notification of a water pump of the battery pack, detecting that the inlet temperature of the battery pack is greater than a preset first temperature threshold value, and detecting that the electric core temperature difference of a battery module in the battery pack is greater than a preset second temperature threshold value, controlling the heater to stop heating the battery pack.

Optionally, the method further comprises:

if the inlet temperature of the battery pack is detected to be not greater than a preset first temperature threshold value, the cell temperature difference of a battery module in the battery pack is detected to be not greater than a preset second temperature threshold value, and a fault removal notice of a water pump of the battery pack is received within a preset time period, acquiring a current first inlet temperature value of the battery pack and a current ambient temperature of the battery pack when a heating request for the battery pack is received;

and determining the power of the heater corresponding to the first inlet temperature value based on a preset corresponding relation between the inlet temperature value and the heater power, and taking the determined power of the heater corresponding to the first inlet temperature value as the first power.

Optionally, the determining, based on a pre-established correspondence relationship, a target power corresponding to the ambient temperature and the first power, a target opening value of a mixing valve, and a target control time includes:

determining a target power compensation value, the target opening value and the target control time corresponding to the ambient temperature and the first power based on a pre-constructed corresponding relationship;

Determining the target power based on the target power compensation value and the first power.

Optionally, the controlling the heater to convert the first power into the target power within the target control time to heat the battery pack, and controlling the opening value of the mixing valve to reach the target opening value within the target control time includes:

determining a power change speed of the heater based on the target power compensation value and the target control time, and determining an opening change speed of the water mixing valve based on the target opening value and the target control time;

and controlling the heater to convert the first power into the target power based on the power change speed within the target control time, and controlling the opening degree value of the water mixing valve to reach the target opening degree value based on the opening degree change speed.

In a second aspect, an embodiment of the present invention provides a heating control device for a battery pack, including:

the heating control device comprises a first obtaining module, a second obtaining module and a heating control module, wherein the first obtaining module is used for obtaining the current ambient temperature of a battery pack and the current first power of a heater under the condition of receiving a heating request for the battery pack;

A first determining module, configured to determine, based on a pre-established correspondence relationship, a target power, a target opening value of a water mixing valve, and a target control time that correspond to the ambient temperature and the first power, where the correspondence relationship is a correspondence relationship between the ambient temperature, the first power, the target opening value, and the target control time that are determined based on historical detection data, and the target power is a power that is used for enabling the temperature of the battery pack to reach a stable state and that does not cause temperature fluctuation of a cabin, other than the battery pack, in an object heated by the heater, to exceed a preset fluctuation range;

the first control module is used for controlling the heater to convert the first power into the target power within the target control time, and controlling the opening value of the water mixing valve to reach the target opening value within the target control time, so that the battery pack is heated under the condition that the temperature fluctuation of a cabin except the battery pack in an object heated by the heater is within the preset fluctuation range.

Optionally, the apparatus further comprises:

The second control module is used for controlling the heater to convert the target power into the first power within the target control time and controlling the opening value of the water mixing valve to convert the target opening value into a preset opening value within the target control time under the condition that the average temperature of the battery modules in the battery pack is detected to reach a preset target temperature.

Optionally, the apparatus further comprises:

a third control module for controlling the operation of the electronic device in the presence of one or more of the following: and when receiving a fault notification of a water pump of the battery pack, detecting that the inlet temperature of the battery pack is greater than a preset first temperature threshold value, and detecting that the electric core temperature difference of a battery module in the battery pack is greater than a preset second temperature threshold value, controlling the heater to stop heating the battery pack.

Optionally, the apparatus further comprises:

the second acquisition module is used for acquiring a current first inlet temperature value of the battery pack and a current environment temperature of the battery pack when a heating request for the battery pack is received if the inlet temperature of the battery pack is detected to be not greater than a preset first temperature threshold value, the cell temperature difference of a battery module in the battery pack is detected to be not greater than a preset second temperature threshold value, and a fault removal notice of a water pump of the battery pack is received within a preset time period;

And the second determining module is used for determining the power of the heater corresponding to the first inlet temperature value based on the preset corresponding relation between the inlet temperature value and the power of the heater, and taking the determined power of the heater corresponding to the first inlet temperature value as the first power.

Optionally, the first determining module is configured to:

Optionally, the first control module is configured to:

In a third aspect, an embodiment of the present invention provides an electronic device, which includes a processor, a memory, and a computer program stored on the memory and executable on the processor, where the computer program, when executed by the processor, implements the steps of the method for controlling heating of a battery pack provided in the foregoing embodiment.

In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements the steps of the method for controlling heating of a battery pack provided in the foregoing embodiment.

As can be seen from the above technical solutions provided by the embodiments of the present invention, in the case of receiving a heating request for a battery pack, the embodiments of the present invention obtain an ambient temperature at which the battery pack is currently located and a current first power of a heater, determine, based on a pre-established correspondence relationship, a target power, a target opening value of a mixing valve, and a target control time, where the correspondence relationship is a correspondence relationship between the ambient temperature, the first power, the target opening value, and the target control time determined based on historical detection data, the target power is a power for enabling the temperature of the battery pack to reach a stable state and not causing temperature fluctuation of a cabin other than the battery pack in an object heated by the heater to exceed a preset fluctuation range, and control the heater to convert from the first power to the target power within the target control time, and controlling the opening value of the water mixing valve to reach the target opening value within the target control time so as to heat the battery pack under the condition that the temperature fluctuation of the cabin except the battery pack in the object heated by the heater is within a preset fluctuation range. Therefore, the power of the heater can be controlled to be converted from the first power to the target power within the target control time, the opening value of the water mixing valve is controlled to reach the target opening value within the target control time, temperature fluctuation of other cabins cannot be caused, the problems that the power of the heater is repeatedly adjusted and the like are solved, and the control accuracy is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic flow chart illustrating a method for controlling heating of a battery pack according to the present invention;

FIG. 2 is a schematic diagram of a heater and mixing valve based battery pack heating system according to the present invention;

fig. 3 is a schematic flow chart illustrating another method for controlling heating of a battery pack according to the present invention;

fig. 4 is a schematic view illustrating a heating control method of a battery pack according to the present invention;

fig. 5 is a schematic view of a heating control device of a battery pack according to the present invention;

fig. 6 is a schematic structural diagram of an electronic device according to the present invention.

Detailed Description

The embodiment of the invention provides a heating control method and device for a battery pack and electronic equipment.

In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

As shown in fig. 1, an embodiment of the present invention provides a heating control method for a battery pack, and an implementation subject of the method may be a controller for controlling power of a heater and an opening value of a mixing valve. The method may specifically comprise the steps of:

in S102, when a heating request for the battery pack is received, the current ambient temperature of the battery pack and the current first power of the heater are obtained.

Taking a battery pack in an electric vehicle as an example, as shown in fig. 2, the battery pack may be a functional device of the electric vehicle, for example, the battery pack may be a battery pack including a ternary lithium iron cell, and since the ternary lithium iron cell has a high energy density, lithium ions may be precipitated to generate lithium dendrites under the condition of an excessively low temperature, and the ternary lithium iron cell may pierce a battery pack film to cause the cell to contact air to cause deflagration, the temperature of the battery pack needs to be strictly controlled to avoid safety problems. The heater can be as the heat production source for passenger cabin and battery package under the low temperature supply heat, passenger cabin water pump and battery package water pump can be arranged in the coolant liquid of circulation heat management pipeline, so that the coolant liquid of heater heating can circulate in the pipeline, the muddy water valve can be according to predetermineeing the proportion with the partial high temperature coolant liquid of heater heating send passenger cabin and battery package respectively into, ambient temperature can be the external environment temperature that electric automobile locates.

In the implementation, along with the popularization of electric vehicles, how to accurately control the heating of a battery pack in the electric vehicle becomes a focus of attention of electric vehicle manufacturers. At present, a heater may be controlled to heat a battery pack of an electric vehicle by a closed-loop control method, for example, when a battery thermal management system receives a heating request for the battery pack, the battery thermal management system may obtain real-time power of the heater, a real-time temperature value of the battery pack, and a preset target temperature that needs to be reached by the battery pack corresponding to the heating request, and adjust power of the heater by a preset control algorithm (e.g., a PID algorithm) to make the temperature of the battery pack reach the target temperature.

However, the closed-loop control method needs to adjust the power of the heater through the real-time feedback value of the battery pack, and in the process of power adjustment, since heating the battery pack causes the indoor temperature of the passenger compartment sharing one heater with the battery pack to decrease, and after the temperature control system of the passenger compartment detects the decrease of the indoor temperature of the passenger compartment, the temperature control system of the passenger compartment also takes measures for increasing the power of the heater, which may cause the electric heating management system and the temperature control system of the passenger compartment to simultaneously adjust the power of the heater, possibly causing problems such as overhigh power of the adjusted heater, even causing safety problems such as overhigh temperature of the battery pack, overlarge temperature difference and the like, so the control method has the problem of poor control accuracy. Therefore, an implementation scheme provided in the embodiments of the present invention may specifically include the following:

Since the battery pack may have a potential safety hazard problem when the temperature of the battery pack is lower than the preset temperature threshold, whether to send a heating request for the battery pack may be determined according to the relationship between the acquired temperature of the battery pack (such as the temperature detected by the temperature sensor 1 and/or the temperature sensor 2 in fig. 2) and the preset temperature threshold. For example, in the case where it is detected that the temperature detected by the temperature sensor 1 is less than the preset temperature threshold, a heating request for the battery pack may be transmitted, i.e., the controller may receive the heating request for the battery pack.

The controller may obtain the current ambient temperature (which may be 21 c, for example) at which the battery pack is located, and the current first power of the heater.

In S104, a target power, a target opening value of the mixing valve, and a target control time corresponding to the ambient temperature and the first power are determined based on the correspondence relationship constructed in advance.

Wherein the correspondence relationship may be a correspondence relationship between an ambient temperature, a first power, a target opening value, and a target control time, which are determined based on the historical detection data, the target power may be a value for bringing the temperature of the battery pack to a steady state, and the power which does not cause the temperature fluctuation of the compartment (such as a passenger compartment) except the battery pack in the object heated by the heater to exceed the preset fluctuation range is not generated, the water mixing valve can be used for adjusting the proportion of the high-temperature cooling liquid flowing into the battery pack and other compartments (namely the compartment before the battery pack in the object heated by the heater), the target opening value can be the proportion of the high-temperature cooling liquid flowing into different heating objects (including the battery pack and other compartments) controlled by the water mixing valve, and the target control time can be the time for controlling the heater to convert the first power into the target power and the time for controlling the opening value of the water mixing valve to convert the target opening value into the target opening value.

In the implementation, taking the heater as the battery pack and the passenger compartment for heating as an example, the indoor temperature T1 of the passenger compartment and the power Pheater1 of the heater after the electric vehicle operates for a first preset time (e.g., 30 minutes) may be obtained at different ambient temperatures T, then the opening value POSvalve of a mixing valve is set, and the indoor temperature T2 of the passenger compartment and the power Pheater2 of the heater may be obtained after a second preset time (e.g., 30 minutes).

Repeated detection is carried out on the basis of the opening values POSvalid of different water mixing valves, so that power Pheater2 (namely POSvalid 1 which does not cause the indoor temperature of the passenger cabin to become obviously low) with the fastest temperature rise rate and the smallest influence on the indoor temperature of the passenger cabin is found, and the corresponding relation among the ambient temperature T, POSvalve1, the Pheater1 and the Pheater2 is determined as the corresponding relation among the corresponding relation, namely the ambient temperature (namely T), the target opening value (namely POSvalid 1) of the water mixing valve, the first power (namely Pheater1) and the target power (namely Pheater 2).

In addition, the temperature of the water inlet of the heater can be set to be a preset value (such as 0 ℃), then the power of the heater is heated by the Pheater2 for the battery pack, the battery pack is enabled to reach a stable state (such as the temperature of the battery pack is not rising), the time tau for the battery pack to reach the stable state is obtained, and the corresponding relation between the target power (i.e. Pheater2) and the target control time (i.e. tau) in the corresponding relation is determined based on the Pheater2 and the time tau.

For example, the constructed correspondence may be as shown in table 1 below.

TABLE 1

Ambient temperature	First powerAt the gear position	Opening value of target	Target power	Target control time
					-5℃	100％	10％	0	5 minutes
-5℃	87％～100％	20％	100％	8 minutes
					-5℃	<87％	25％	100％	10 minutes
-10℃	100％	15％	0	5 minutes
					-10℃	87％～100％	25％	100％	8 minutes

According to the corresponding relation, the target power corresponding to the ambient temperature and the first power, the target opening value of the water mixing valve and the target control time can be obtained.

In S106, the heater is controlled to convert from the first power to the target power within the target control time, and the opening value of the water mixing valve is controlled to reach the target opening value within the target control time, so as to heat the battery pack in a case where the temperature fluctuation of the cabin other than the battery pack in the object heated by the heater is within a preset fluctuation range.

In an implementation, for example, the ambient temperature is-10 ℃, the first power of the heater is 70%, and when a heating request for the battery pack is received, the corresponding target power is 98%, the target opening value of the mixing valve is 30%, and the target control time is 3min, which can be determined by the ambient temperature T1, the first power of 70%, and the corresponding relationship. The power of the heater is gradually changed from 70% to 98% within 3min, and the opening value of the water mixing valve is gradually increased from 0 to 30%.

In this way, the power of the heater is gradually increased within the target control time (i.e., the heater is controlled to be converted from the first power to the target power), the water mixing valve is gradually opened (i.e., the opening value of the water mixing valve is controlled to reach the target opening value within the target control time), so that the heat taken away by the battery pack is compensated in the power increasing process of the heater, the heating of the passenger compartment (i.e., the compartment except the battery pack in the object heated by the heater) is not affected, and the temperature of the coolant in the passenger compartment is maintained. In addition, the process that mixes the water valve and open gradually can not make the large-traffic battery package that flows of high temperature coolant liquid, and partial high temperature coolant liquid mixes with the cryogenic cooling liquid in the battery package in mixing the water valve, makes the coolant temperature who gets into the battery package reduce, guarantees the stationarity that the battery package temperature rises.

The embodiment of the invention provides a heating control method of a battery pack, which comprises the steps of acquiring the current ambient temperature of the battery pack and the current first power of a heater under the condition of receiving a heating request for the battery pack, determining the target power, the target opening value of a water mixing valve and the target control time corresponding to the ambient temperature and the first power based on a pre-established corresponding relation, wherein the corresponding relation is the corresponding relation among the ambient temperature, the first power, the target opening value and the target control time determined based on historical detection data, the target power is the power for enabling the temperature of the battery pack to reach a stable state and not causing the temperature fluctuation of a cabin except the battery pack in an object heated by the heater to exceed a preset fluctuation range, controlling the heater to be converted into the target power from the first power within the target control time, and controlling the opening value of the water mixing valve to reach the target opening value within the target control time so as to heat the battery pack under the condition that the temperature fluctuation of the cabin except the battery pack in the object heated by the heater is within a preset fluctuation range. Therefore, the power of the heater can be controlled to be converted from the first power to the target power within the target control time, the opening value of the water mixing valve is controlled to reach the target opening value within the target control time, temperature fluctuation of other cabins cannot be caused, the problems that the power of the heater is repeatedly adjusted and the like are solved, and the control accuracy is improved.

Example two

As shown in fig. 3, an embodiment of the present invention provides a method for controlling heating of a battery pack, where an execution main body of the method may be a server, and the server may be an independent server or a server cluster composed of a plurality of servers, and the method specifically includes the following steps:

in S302, when a heating request for the battery pack is received, the current ambient temperature of the battery pack and the current first power of the heater are obtained.

In S304, a target power compensation value, a target opening value, and a target control time corresponding to the ambient temperature and the first power are determined based on the correspondence relationship constructed in advance.

The correspondence relationship may be a correspondence relationship between an ambient temperature, a first power, a target power compensation value, a target opening value, and a target control time, which are determined based on the historical detection data, and the target power compensation value may be used to perform compensation processing on the first power so that the heater heats the battery pack without causing temperature fluctuation of a compartment other than the battery pack in the object heated by the heater to exceed a preset fluctuation range based on the first power after the compensation processing.

In S306, a target power is determined based on the target power compensation value and the first power.

In an implementation, the target power compensation value and the sum of the first power may be determined as the target power.

In addition, the gear where the sum of the target power compensation value and the first power is located can be obtained, and the target power corresponding to the gear where the sum of the target power compensation value and the first power is located is determined based on the preset corresponding relation between the gear and the power.

In S308, a power change speed of the heater is determined based on the target power compensation value and the target control time, and an opening degree change speed of the mixing valve is determined based on the target opening degree value and the target control time.

In an implementation, the ratio of the target power compensation value to the target control time may be determined as the power change speed of the heater, and the ratio of the target opening value to the target control time may be determined as the opening change speed of the mixing valve.

The determination method of the power change speed and the opening degree change speed is an optional and realizable determination method, and in an actual application scenario, there may be a plurality of different determination methods, which may be different according to different actual application scenarios, and this is not specifically limited in the embodiment of the present invention.

In S310, the heater is controlled to be switched from the first power to the target power based on the power change speed within the target control time, and the opening degree value of the mixing valve is controlled to reach the target opening degree value based on the opening degree change speed.

In S312, one or more of the following occurs: when receiving the fault notice of the water pump of the battery pack, detecting that the inlet temperature of the battery pack is greater than a preset first temperature threshold value and detecting that the electric core temperature difference of the battery module in the battery pack is greater than a preset second temperature threshold value, controlling the heater to stop heating the battery pack.

In the implementation, as shown in fig. 2, the inlet temperature of the battery pack can be acquired through the temperature sensor 1, the cell temperature of each module in the battery module is acquired through the cell temperature sensor, and the highest cell temperature and the lowest cell temperature are used as the cell temperature difference of the battery module in the battery pack.

In S314, if it is detected that the inlet temperature of the battery pack is not greater than the preset first temperature threshold, and it is detected that the cell temperature difference of the battery module in the battery pack is not greater than the preset second temperature threshold, and a failure removal notification of the water pump of the battery pack is received, when a heating request for the battery pack is received, a first inlet temperature value of the current battery pack and an ambient temperature at which the battery pack is currently located are obtained.

In S316, the heater power corresponding to the first inlet temperature value is determined based on the preset correspondence relationship between the inlet temperature value and the heater power, and the heater power corresponding to the first inlet temperature value is determined as the first power.

In an implementation, after S316, S304 may be continuously performed, that is, the target control time, the target opening value of the mixing valve, and the target power are continuously determined according to the first power and the ambient temperature, the heater is controlled to convert from the first power to the target power within the target control time so as to heat the battery pack, and the opening value of the mixing valve is controlled to reach the target opening value within the target control time.

Furthermore, as shown in fig. 4, the control process can be divided into 6 different phases, such as a standby phase, a calculation phase, a temperature rise phase, a stabilization phase, an off output phase, and a heating pause phase.

The standby phase may be a phase when a heating request for the battery pack is not received. The calculation step may be a step of determining a target power compensation value, a target opening value, and a target control time corresponding to the ambient temperature and the first power according to a pre-established correspondence relationship when the heating request for the battery pack is received, that is, a step of acquiring the target power compensation value, the target opening value, and the target control time through the above steps S302 to S304. The temperature increase step may be a step of controlling the heater to convert the first power into the target power based on the power change rate within the target control time and controlling the opening degree of the water mixing valve to reach the target opening degree based on the opening degree change rate through the steps S306 to S310.

The temperature rise stage may be a stage in which the power of the heater reaches a target power, the opening value of the water mixing valve reaches the target opening value, and the average temperature of the battery pack reaches a set target temperature, where as shown in fig. 2, the average temperature of the battery pack may be an average value of the battery core temperatures of each battery module acquired by the battery core temperature sensor, an average value of the battery pack inlet temperature detected by the temperature sensor 1 and the battery pack outlet temperature detected by the temperature sensor 2, or an average value of the battery core temperature of each battery module, the battery pack inlet temperature, and the battery pack outlet temperature.

The step of turning off the output may be a step of, when the average temperature of the battery pack reaches a set target temperature, controlling the power of the heater to be converted from the target power to the first power within a target control time (i.e., eliminating the target power compensation value within the target control time), and controlling the opening value of the water mixing valve to be converted from the target opening value to zero, i.e., stopping heating the battery pack.

The heating pause period may be when one or more of the following occurs: and controlling the heater to stop heating the battery pack when receiving a fault notice of a water pump of the battery pack, detecting that the inlet temperature of the battery pack is greater than a preset first temperature threshold value, and detecting that the electric core temperature difference of a battery module in the battery pack is greater than a preset second temperature threshold value. If in the preset time period, the inlet temperature of the battery pack is detected to be not greater than a preset first temperature threshold value, the electric core temperature difference of the battery module in the battery pack is detected to be not greater than a preset second temperature threshold value, and the fault removing notice of the water pump of the battery pack is received, the calculation state can be converted, and if in the preset time period, the inlet temperature of the battery pack is not detected to be not greater than the preset first temperature threshold value, or the electric core temperature difference of the battery module in the battery pack is not detected to be not greater than the preset second temperature threshold value, or the fault removing notice of the water pump of the battery pack is not received, the standby state can be converted.

EXAMPLE III

Based on the same idea, the embodiment of the present invention further provides a heating control device for a battery pack, as shown in fig. 5.

This heating control device of battery package includes: a first obtaining module 501, a first determining module 502, and a first control module 503, wherein:

a first obtaining module 501, configured to, when a heating request for a battery pack is received, obtain a current ambient temperature of the battery pack and a current first power of a heater;

a first determining module 502, configured to determine, based on a pre-established correspondence relationship, a target power, a target opening value of a water mixing valve, and a target control time, where the target power, the target opening value of the water mixing valve, and the target control time correspond to the ambient temperature and the first power, and the correspondence relationship is determined based on historical detection data, where the target power is a power that is used for enabling the temperature of the battery pack to reach a stable state and that does not cause temperature fluctuation of a cabin, other than the battery pack, in an object heated by the heater to exceed a preset fluctuation range;

The first control module 503 is configured to control the heater to convert the first power into the target power within the target control time, and control the opening value of the water mixing valve to reach the target opening value within the target control time, so as to heat the battery pack when temperature fluctuation of a cabin except the battery pack in an object heated by the heater is within the preset fluctuation range.

In an embodiment of the present invention, the apparatus further includes:

and the second determining module is used for determining the power of the heater corresponding to the first inlet temperature value based on the preset corresponding relation between the inlet temperature value and the power of the heater, and taking the determined power of the heater corresponding to the first inlet temperature value as the first power. .

In this embodiment of the present invention, the first determining module 502 is configured to:

In this embodiment of the present invention, the first control module 503 is configured to:

The embodiment of the invention provides a heating control device of a battery pack, which is characterized in that under the condition of receiving a heating request for the battery pack, the current ambient temperature of the battery pack and the current first power of a heater are obtained, and the target power, the target opening value of a water mixing valve and the target control time corresponding to the ambient temperature and the first power are determined based on the pre-established corresponding relation, wherein the corresponding relation is the corresponding relation among the ambient temperature, the first power, the target opening value and the target control time determined based on historical detection data, the target power is the power for enabling the temperature of the battery pack to reach a stable state and not causing the temperature fluctuation of a cabin except the battery pack in an object heated by the heater to exceed a preset fluctuation range, and the heater is controlled to be converted from the first power to the target power within the target control time, and controlling the opening value of the water mixing valve to reach the target opening value within the target control time so as to heat the battery pack under the condition that the temperature fluctuation of the cabin except the battery pack in the object heated by the heater is within a preset fluctuation range. Therefore, the power of the heater can be controlled to be converted from the first power to the target power within the target control time, the opening value of the water mixing valve is controlled to reach the target opening value within the target control time, temperature fluctuation of other cabins cannot be caused, the problems that the power of the heater is repeatedly adjusted and the like are solved, and the control accuracy is improved.

Example four

Figure 6 is a schematic diagram of a hardware configuration of an electronic device implementing various embodiments of the invention,

the electronic device 600 includes, but is not limited to: a radio frequency unit 601, a network module 602, an audio output unit 603, an input unit 604, a sensor 605, a display unit 606, a user input unit 607, an interface unit 608, a memory 609, a processor 610, and a power supply 611. Those skilled in the art will appreciate that the electronic device configuration shown in fig. 6 does not constitute a limitation of the electronic device, and that the electronic device may include more or fewer components than shown, or some components may be combined, or a different arrangement of components. In the embodiment of the present invention, the electronic device includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer, and the like.

The processor 610 is configured to, in a case that a heating request for a battery pack is received, obtain a current ambient temperature of the battery pack and a current first power of a heater;

a processor 610, configured to determine a target power, a target opening value of a water mixing valve, and a target control time, which correspond to the ambient temperature and the first power, based on a pre-established correspondence relationship, where the correspondence relationship is a correspondence relationship between the ambient temperature, the first power, the target opening value, and the target control time, which are determined based on historical detection data, and the target power is a power that is used for enabling the temperature of the battery pack to reach a stable state and does not cause temperature fluctuation of a cabin, other than the battery pack, in an object heated by the heater, to exceed a preset fluctuation range;

The processor 610 is configured to control the heater to convert the first power into the target power within the target control time, and control the opening value of the water mixing valve to reach the target opening value within the target control time, so as to heat the battery pack when temperature fluctuation of a cabin except the battery pack in an object heated by the heater is within the preset fluctuation range.

In addition, the processor 610 is further configured to control the heater to convert the target power into the first power within the target control time and control the opening value of the water mixing valve to convert the target opening value into a preset opening value within the target control time when it is detected that the average temperature of the battery modules in the battery pack reaches a preset target temperature.

Additionally, the processor 610 is further configured to, in the event that one or more of the following occurs: and when receiving a fault notification of a water pump of the battery pack, detecting that the inlet temperature of the battery pack is greater than a preset first temperature threshold value, and detecting that the electric core temperature difference of a battery module in the battery pack is greater than a preset second temperature threshold value, controlling the heater to stop heating the battery pack.

In addition, the processor 610 is further configured to, if it is detected that the inlet temperature of the battery pack is not greater than a preset first temperature threshold, and it is detected that the cell temperature difference of a battery module in the battery pack is not greater than a preset second temperature threshold, and a fault release notification of a water pump of the battery pack is received, obtain a current first inlet temperature value of the battery pack and a current ambient temperature of the battery pack when a heating request for the battery pack is received;

in addition, the processor 610 is further configured to determine, based on a preset corresponding relationship between an inlet temperature value and heater power, the heater power corresponding to the first inlet temperature value, and use the heater power corresponding to the first inlet temperature value as the first power.

Further, the processor 610 is further configured to determine a target power compensation value, the target opening value, and the target control time corresponding to the ambient temperature and the first power based on a pre-constructed correspondence relationship;

additionally, the processor 610 is further configured to determine the target power based on the target power compensation value and the first power.

In addition, the processor 610 is further configured to determine a power change speed of the heater based on the target power compensation value and the target control time, and determine an opening degree change speed of the mixing valve based on the target opening degree value and the target control time;

in addition, the processor 610 is further configured to control the heater to convert from the first power to the target power based on the power change speed within the target control time, and control the opening value of the mixing valve to reach the target opening value based on the opening change speed.

The embodiment of the invention provides an electronic device, which obtains the current ambient temperature of a battery pack and the current first power of a heater under the condition of receiving a heating request for the battery pack, determines a target power, a target opening value of a water mixing valve and a target control time corresponding to the ambient temperature and the first power based on a pre-established corresponding relation, wherein the corresponding relation is the corresponding relation among the ambient temperature, the first power, the target opening value and the target control time determined based on historical detection data, the target power is the power for enabling the temperature of the battery pack to reach a stable state and not causing the temperature fluctuation of a cabin except the battery pack in an object heated by the heater to exceed a preset fluctuation range, controls the heater to be converted from the first power to the target power within the target control time, and controls the opening value of the water mixing valve to reach the target opening value within the target control time, to heat the battery pack in a case where temperature fluctuation of a compartment other than the battery pack in the object heated by the heater is within a preset fluctuation range. Therefore, the power of the heater can be controlled to be converted from the first power to the target power within the target control time, the opening value of the water mixing valve is controlled to reach the target opening value within the target control time, temperature fluctuation of other cabins cannot be caused, the problems that the power of the heater is repeatedly adjusted and the like are solved, and the control accuracy is improved.

It should be understood that, in the embodiment of the present invention, the radio frequency unit 601 may be used for receiving and sending signals during a message sending and receiving process or a call process, and specifically, receives downlink data from a base station and then processes the received downlink data to the processor 610; in addition, the uplink data is transmitted to the base station. In general, radio frequency unit 601 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 601 may also communicate with a network and other electronic devices through a wireless communication system.

The electronic device provides wireless broadband internet access to the user via the network module 602, such as assisting the user in sending and receiving e-mails, browsing web pages, and accessing streaming media.

The audio output unit 603 may convert audio data received by the radio frequency unit 601 or the network module 602 or stored in the memory 609 into an audio signal and output as sound. Also, the audio output unit 603 may also provide audio output related to a specific function performed by the electronic apparatus 600 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 603 includes a speaker, a buzzer, a receiver, and the like.

The input unit 604 is used to receive audio or video signals. The input unit 604 may include a Graphics Processing Unit (GPU) 6041 and a microphone 6042, and the graphics processor 6041 processes image data of a still picture or video obtained by an image capturing apparatus (such as a camera) in a video capture mode or an image capture mode. The processed image frames may be displayed on the display unit 606. The image frames processed by the graphic processor 6041 may be stored in the memory 609 (or other storage medium) or transmitted via the radio frequency unit 601 or the network module 602. The microphone 6042 can receive sound, and can process such sound into audio data. The processed audio data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 601 in case of the phone call mode.

The electronic device 600 also includes at least one sensor 605, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that can adjust the brightness of the display panel 6061 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 6061 and/or the backlight when the electronic apparatus 600 is moved to the ear. As one type of motion sensor, an accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used to identify the posture of an electronic device (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), and vibration identification related functions (such as pedometer, tapping); the sensors 605 may also include fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., which are not described in detail herein.

The display unit 606 is used to display information input by the user or information provided to the user. The display unit 606 may include a display panel 6061, and the display panel 6061 may be configured in the form of a Liquid Crystal Display (LCD), an organic light-emitting diode (OLED), or the like.

The user input unit 607 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the electronic device. Specifically, the user input unit 607 includes a touch panel 6071 and other input devices 6072. Touch panel 6071, also referred to as a touch screen, may collect touch operations by a user on or near it (e.g., operations by a user on or near touch panel 6071 using a finger, stylus, or any suitable object or accessory). The touch panel 6071 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 610, receives a command from the processor 610, and executes the command. In addition, the touch panel 6071 can be implemented by various types such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. The user input unit 607 may include other input devices 6072 in addition to the touch panel 6071. Specifically, the other input devices 6072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a track ball, a mouse, and a joystick, which are not described herein again.

Further, the touch panel 6071 can be overlaid on the display panel 6061, and when the touch panel 6071 detects a touch operation on or near the touch panel 6071, the touch operation is transmitted to the processor 610 to determine the type of the touch event, and then the processor 610 provides a corresponding visual output on the display panel 6061 according to the type of the touch event. Although the touch panel 6071 and the display panel 6061 are shown in fig. 6 as two separate components to implement the input and output functions of the electronic device, in some embodiments, the touch panel 6071 and the display panel 6061 may be integrated to implement the input and output functions of the electronic device, and this is not limited here.

The interface unit 608 is an interface for connecting an external device to the electronic apparatus 600. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 608 may be used to receive input (e.g., data information, power, etc.) from external devices and transmit the received input to one or more elements within the electronic device 600 or may be used to transmit data between the electronic device 600 and external devices.

The memory 609 may be used to store software programs as well as various data. The memory 609 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 609 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The processor 610 is a control center of the electronic device, connects various parts of the whole electronic device by using various interfaces and lines, performs various functions of the electronic device and processes data by running or executing software programs and/or modules stored in the memory 609, and calling data stored in the memory 609, thereby performing overall monitoring of the electronic device. Processor 610 may include one or more processing units; preferably, the processor 610 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 610.

The electronic device 600 may further include a power supply 611 (e.g., a battery) for supplying power to the various components, and preferably, the power supply 611 may be logically connected to the processor 610 via a power management system, such that the power management system may be used to manage charging, discharging, and power consumption.

Preferably, an embodiment of the present invention further provides an electronic device, which includes a processor 610, a memory 609, and a computer program stored in the memory 609 and capable of running on the processor 610, where the computer program, when executed by the processor 610, implements each process of the above embodiment of the method for controlling heating of a battery pack, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.

EXAMPLE five

An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the above-mentioned embodiment of the method for controlling heating of a battery pack, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here. The computer-readable storage medium may be a Read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

The embodiment of the invention provides a computer-readable storage medium, which is used for acquiring the current ambient temperature of a battery pack and the current first power of a heater under the condition of receiving a heating request for the battery pack, determining the target power, the target opening value of a water mixing valve and the target control time corresponding to the ambient temperature and the first power based on a pre-established corresponding relation, wherein the corresponding relation is the corresponding relation among the ambient temperature, the first power, the target opening value and the target control time determined based on historical detection data, the target power is the power which is used for enabling the temperature of the battery pack to reach a stable state and cannot cause the temperature fluctuation of a cabin except the battery pack in an object heated by the heater to exceed a preset fluctuation range, controlling the heater to be converted from the first power to the target power within the target control time, and controlling the opening value of the water mixing valve to reach the target opening value within the target control time so as to heat the battery pack under the condition that the temperature fluctuation of the cabin except the battery pack in the object heated by the heater is within a preset fluctuation range. Therefore, the power of the heater can be controlled to be converted from the first power to the target power within the target control time, the opening value of the water mixing valve is controlled to reach the target opening value within the target control time, temperature fluctuation of other cabins cannot be caused, the problems that the power of the heater is repeatedly adjusted and the like are solved, and the control accuracy is improved.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable batch processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable batch processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable batch processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable batch processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.

The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). Memory is an example of a computer-readable medium.

Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include transitory computer readable media (transient media) such as modulated data signals and carrier waves.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A method of controlling heating of a battery pack, the method comprising:

2. The method of claim 1, further comprising:

3. The method of claim 1, further comprising:

4. The method of claim 3, further comprising:

5. The method according to claim 1, wherein the determining a target power, a target opening value of a mixing valve and a target control time corresponding to the ambient temperature and the first power based on a pre-established correspondence relationship comprises:

6. The method of claim 5, wherein the controlling the heater to convert from the first power to the target power for heating the battery pack and to control the opening value of the mixing valve to reach the target opening value within the target control time comprises:

7. A heating control device for a battery pack, the device comprising:

8. The apparatus of claim 7, further comprising:

9. An electronic device comprising a processor, a memory, and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method for controlling heating of a battery pack according to any one of claims 1 to 6.

10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method for controlling heating of a battery pack according to any one of claims 1 to 6.