CN117734529A

CN117734529A - Thermal management method and device for battery pack

Info

Publication number: CN117734529A
Application number: CN202311348735.9A
Authority: CN
Inventors: 李俊
Original assignee: Zhejiang Geely Holding Group Co Ltd; Radar New Energy Vehicle Zhejiang Co Ltd
Current assignee: Zhejiang Geely Holding Group Co Ltd; Radar New Energy Vehicle Zhejiang Co Ltd
Priority date: 2023-10-17
Filing date: 2023-10-17
Publication date: 2024-03-22

Abstract

One or more embodiments of the present disclosure provide a method and apparatus for thermal management of a battery pack. The method comprises the following steps: acquiring a first moment of power supply of an external load by a battery pack based on a vehicle, which is set by a user; calculating a temperature cooling time period required for starting a refrigeration device of the vehicle to cool the battery pack so as to cool the temperature of the battery pack to an optimal temperature; and charging the battery pack based on a charging device to restore the SOC of the battery pack to a charging duration required for a preset value; and calculating the starting time for starting the refrigeration equipment to cool the battery pack in advance before the first time based on the temperature cooling time and the charging time. Accordingly, the refrigerating device can be started at the starting time to cool the battery pack to the optimal temperature, and the SOC of the battery pack is restored to the preset value, so that the battery pack is in the optimal state when the battery pack supplies power to the external load.

Description

Thermal management method and device for battery pack

Technical Field

One or more embodiments of the present disclosure relate to the field of automobiles, and more particularly, to a method and apparatus for thermal management of a battery pack.

Background

With the general use of electric vehicles, the discharge function of the electric vehicles is raised, and the China is wide in land margin and huge in temperature span. The Vehicle external discharge V2L (Vehicle-to-Load) is a technology for supplying power to an external Load by using a battery system of the Vehicle. In the V2L technology, the battery pack is not thermally managed, and how to make the battery pack in an optimal state when the battery pack supplies power to an external load is a technical problem to be solved.

Disclosure of Invention

In view of the foregoing, one or more embodiments of the present disclosure provide a method and apparatus for thermal management of a battery pack to solve the problems in the related art.

In order to achieve the above object, one or more embodiments of the present disclosure provide the following technical solutions:

according to a first aspect of one or more embodiments of the present specification, there is provided a method of thermal management of a battery pack, comprising:

acquiring a first moment of power supply of an external load by a battery pack based on a vehicle, which is set by a user;

calculating a temperature cooling time period required for starting a refrigeration device of the vehicle to cool the battery pack so as to cool the temperature of the battery pack to an optimal temperature; and charging the battery pack based on the charging device to restore the SOC of the battery pack to a charging duration required for a preset value;

calculating an opening time for starting the refrigeration equipment to cool the battery pack in advance before the first time based on the temperature cooling time and the charging time; and the time length between the starting time and the first time is not less than the sum of the temperature cooling time length and the charging time length.

According to a second aspect of one or more embodiments of the present specification, there is provided a thermal management device of a battery pack, comprising:

the acquisition module is used for acquiring a first moment of power supply of the external load by the battery pack based on the vehicle, which is set by a user;

the first calculation module is used for calculating a temperature cooling time period required for starting the refrigeration equipment of the vehicle to cool the battery pack so as to cool the temperature of the battery pack to an optimal temperature; and charging the battery pack based on the charging device to restore the SOC of the battery pack to a charging duration required for a preset value;

the second calculating module is used for calculating the starting time for starting the refrigeration equipment to cool the battery pack in advance before the first time based on the temperature cooling time and the charging time; and the time length between the starting time and the first time is not less than the sum of the temperature cooling time length and the charging time length.

According to a third aspect of one or more embodiments of the present specification, there is provided an electronic device comprising:

a processor;

a memory for storing processor-executable instructions;

wherein the processor implements the method of the first aspect by executing the executable instructions.

According to a fourth aspect of one or more embodiments of the present description, there is provided a computer readable storage medium having stored thereon computer instructions which, when executed by a processor, implement the steps of the method as described in the first aspect.

Based on the above embodiment, the opening time of the refrigeration device can be determined by calculating the temperature cooling time period required for opening the refrigeration device of the vehicle to cool the battery pack to the optimal temperature and the charging time period required for opening the charging device to restore the SOC of the battery pack to the preset value. Accordingly, the refrigerating device can be started at the starting time to cool the battery pack to the optimal temperature, and the SOC of the battery pack is restored to the preset value, so that the battery pack is in the optimal state when the battery pack supplies power to the external load.

Drawings

Fig. 1 is a flowchart of a method of thermal management of a battery pack according to an exemplary embodiment.

Fig. 2 is a schematic architecture diagram of a thermal management system for a battery pack according to an exemplary embodiment.

Fig. 3 is a schematic structural view of a thermal management device of a battery pack according to an exemplary embodiment.

Fig. 4 is a flowchart of a method of thermal management of a battery pack according to an exemplary embodiment.

Fig. 5 is a schematic structural diagram of an electronic device according to an exemplary embodiment.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with one or more embodiments of the present specification. Rather, they are merely examples of apparatus and methods consistent with aspects of one or more embodiments of the present description as detailed in the accompanying claims.

It should be noted that: in other embodiments, the steps of the corresponding method are not necessarily performed in the order shown and described in this specification. In some other embodiments, the method may include more or fewer steps than described in this specification. Furthermore, individual steps described in this specification, in other embodiments, may be described as being split into multiple steps; while various steps described in this specification may be combined into a single step in other embodiments.

With the common use of electric vehicles, the related technology has the advantages that the discharge function of the electric vehicles is raised, the Chinese land margin is wide, and the temperature span is huge. The Vehicle external discharge V2L (Vehicle-to-Load) refers to a technique of supplying power to an external Load using a battery system of the Vehicle. The V2L technology does not thermally manage the battery pack, and it is easy to make the battery pack not at an optimal temperature when the external load is supplied with power.

If the temperature of the battery pack is adjusted in advance, the electric quantity of the battery pack needs to be consumed, and the electric quantity of the battery pack is easy to cause that the electric quantity of the battery pack cannot meet the power supply requirement.

In the related art, when the vehicle is in a gun inserting State, if the vehicle has completed a charging operation of the vehicle through the charging device before the temperature of the battery pack is adjusted, that is, the State of Charge (SOC) of the battery pack has been charged to a preset value, the charging device will not automatically be turned on until a new charging instruction is not received when the SOC is lower than the preset value due to a subsequent consumption behavior of the battery pack.

In view of this, the present specification proposes a thermal management method of a battery pack. Based on the obtained time of supplying power to the external load by the battery pack, the temperature cooling time required for starting the refrigeration equipment of the vehicle to cool the battery pack to the optimal temperature and the charging time required for starting the charging equipment to restore the SOC of the battery pack to the preset value are calculated, so that the starting time of starting the refrigeration equipment can be determined.

When the method is realized, a first moment of power supply to an external load, which is set by a user and is based on a battery pack of a vehicle, is obtained; calculating a temperature cooling time period required for starting a refrigeration device of the vehicle to cool the battery pack so as to cool the temperature of the battery pack to an optimal temperature; and charging the battery pack based on the charging device to restore the SOC of the battery pack to a charging duration required for a preset value; calculating an opening time for starting the refrigeration equipment to cool the battery pack in advance before the first time based on the temperature cooling time and the charging time; and the time length between the starting time and the first time is not less than the sum of the temperature cooling time length and the charging time length.

In the above technical scheme, the starting time of the refrigeration equipment can be determined by calculating the temperature cooling time required for starting the refrigeration equipment of the vehicle to cool the battery pack to the optimal temperature and the charging time required for starting the charging equipment to restore the SOC of the battery pack to the preset value. Accordingly, the refrigerating device can be started at the starting time to cool the battery pack to the optimal temperature, and the SOC of the battery pack is restored to the preset value, so that the battery pack is in the optimal state when the battery pack supplies power to the external load.

In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the present specification will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

Referring to fig. 1, fig. 1 is a schematic diagram illustrating a method for thermal management of a battery pack according to an exemplary embodiment. The method may be performed by a battery management system (Battery Management System, BMS) that manages a battery pack of a vehicle, or may be performed by a vehicle control unit (Vehicle Control Unit, VCU) that controls the vehicle, and for simplicity, the VCU is taken as an execution subject in the following embodiments. The thermal management method of the battery pack may include the following steps.

S110, acquiring a first moment of power supply of the external load by the battery pack based on the vehicle, which is set by a user.

The user may set a first time of supplying power to the external load using the battery pack of the vehicle through the vehicle-mounted interactive system or an Application (APP) associated with the vehicle according to actual needs, for example, the user may set a first time of supplying power to the external load using the battery pack of the vehicle in the vehicle interactive system after parking.

S120, calculating a temperature cooling time period required for starting a refrigeration device of the vehicle to cool the battery pack so as to cool the temperature of the battery pack to an optimal temperature; and charging the battery pack based on the charging device to restore the SOC of the battery pack to a charging duration required for a preset value.

S130, calculating the starting time for starting the refrigeration equipment to cool the battery pack in advance before the first time based on the temperature cooling time and the charging time; and the time length between the starting time and the first time is not less than the sum of the temperature cooling time length and the charging time length.

After determining a first time at which a battery pack of a vehicle supplies power to an external load, a temperature adjustment time period required to adjust the temperature of the battery pack of the vehicle to an optimal temperature may be calculated.

Wherein the temperature adjustment of the battery pack may include starting a heater to heat the battery pack or starting a refrigerating device to cool the battery pack.

In one embodiment, the temperature of the battery pack and the ambient temperature can be obtained, and whether the battery pack needs to be heated or cooled before the first moment when the battery pack supplies power to the external load is determined according to the temperature of the battery pack and the ambient temperature; if the battery pack is determined to be required to be heated, calculating a temperature heating time period required for starting a heater of the vehicle to heat the battery pack so as to heat the battery pack to an optimal temperature; and if the battery pack is determined to be required to be cooled, calculating a temperature cooling time period required for starting the refrigeration equipment of the vehicle to cool the battery pack so as to cool the temperature of the battery pack to an optimal temperature.

In one embodiment, the temperature of the battery pack is obtained, and if the temperature of the battery pack is lower than the optimal temperature of the battery pack, the temperature heating duration required for starting the heater of the vehicle to heat the battery pack to the optimal temperature is calculated.

In one embodiment, the temperature of the battery pack is obtained, and if the temperature of the battery pack is higher than the optimal temperature of the battery pack, a temperature cooling time period required for starting a refrigeration device of the vehicle to cool the battery pack to cool the temperature of the battery pack to the optimal temperature is calculated.

For simplicity, the following embodiments will take as an example the temperature cooling time period required to cool the battery pack to the optimal temperature by calculating the cooling time period required to turn on the refrigeration device of the vehicle.

The method for calculating the temperature cooling time period required for starting the refrigeration equipment of the vehicle to cool the battery pack to cool the temperature of the battery pack to the optimal temperature can be various, for example, estimation can be performed based on the preset corresponding relationship between the ambient temperature and the temperature cooling time period; or the temperature cooling time period can be calculated based on the ambient temperature through a preset formula.

The cooling device is started to cool the temperature of the battery pack, and the electric quantity of the battery pack needs to be consumed, so that the SOC of the battery pack is in shortage and cannot reach a preset value. For this, it is possible to instruct to turn on the charging device to charge the battery pack again after cooling the temperature of the battery pack to the optimal temperature, so as to restore the SOC of the battery pack to a preset value.

The preset value of SOC may be set according to actual needs, for example, 100%, 90%, 95%, etc.

In one embodiment, when a temperature cooling time period required for turning on a refrigeration device of the vehicle to cool the battery pack to cool the temperature of the battery pack to an optimal temperature is calculated, a charging time period required for charging the battery pack based on the charging device to restore the SOC of the battery pack to a preset value may also be calculated.

Based on the calculated temperature cooling time and the calculated charging time, an opening time for cooling the battery pack by opening the refrigeration equipment in advance before the first time can be calculated.

For example, a temperature cooling time period Δtd required to turn on a refrigeration device of the vehicle to cool the battery pack to cool the temperature of the battery pack to an optimal temperature Ts may be calculated based on the acquired ambient temperature T1 and the temperature T2 of the battery pack; and charging the battery pack based on the charging device to restore the SOC of the battery pack to a charging duration Δtc required for a preset value; determining the starting time ts for starting the refrigeration equipment in advance before the first time t1 for supplying power to the external load by the battery pack based on the calculated temperature cooling time delta td and charging time delta tc; where, the on time ts=t1- Δtd- Δtc. When the time reaches Ts, the refrigerating equipment is started to cool the battery pack so as to cool the temperature of the battery pack to the optimal temperature Ts, and then the refrigerating equipment is turned off to instruct the charging equipment to charge the battery pack so as to restore the SOC of the battery pack to a preset value.

The triggering time for triggering the calculation process in the step S120 may be set according to actual needs, for example, the calculation process may be triggered when the first time set by the user for supplying power to the external load based on the battery pack of the vehicle is obtained; or, based on the obtained first time, the preset time before the first time corresponds to the second time t2 to wake up the VCU of the vehicle and trigger the calculation process, for example, the VCU of the vehicle may be wake up 2 hours or 3 hours before the time of use and trigger the calculation process.

In one embodiment, the VCU may obtain a first time t1 set by a user and used for supplying power to an external load based on a battery pack of the vehicle after the vehicle is parked, and set a second time t2 corresponding to a preset time before the first time to wake up the VCU, and determine whether the vehicle is in a gun inserting state, if so, trigger the calculation process, calculate a temperature cooling time period required for starting a refrigeration device of the vehicle to cool the battery pack to cool the temperature of the battery pack to an optimal temperature; and charging the battery pack based on the charging device to restore the SOC of the battery pack to a charging duration required for a preset value; and calculating the starting time for starting the refrigeration equipment to cool the battery pack in advance before the first time based on the temperature cooling time and the charging time.

The gun state may indicate whether the vehicle is in an ac charging state.

In one embodiment, after the calculation is triggered, the ambient temperature T1 and the current battery temperature T2 of the battery pack may be acquired first.

The method for obtaining the ambient temperature T1 may be set according to actual needs. For example, in one embodiment, the first ambient temperature T11 acquired at the current time may be taken as the ambient temperature T1, and for example, the first ambient temperature T11 at the current time may be acquired by an outdoor temperature sensor.

In another embodiment, since there is a certain time difference between the current time and the first time, it is also possible to obtain the second ambient temperature T12 at the first time from the weather forecast and determine the ambient temperature T1 used in the calculation process based on the first ambient temperature T11 and the second ambient temperature T12. For example, one of the first ambient temperature and the second ambient temperature may be selected as an ambient temperature used in the calculation process according to a time difference between the first time and the current time, or the ambient temperature t1=at11+bt12 may be calculated by performing weighted summation on the first ambient temperature and the second ambient temperature, where a and b are weighting coefficients, a+b=1, and the weighting coefficients a and b may be weighting coefficients corresponding to the time difference between the first time and the current time, for example, if the time difference is large, a may be smaller than b; if the time difference is short, a may be greater than b. If a=b=0.5, it means that the calculated ambient temperature T1 is the average of the first ambient temperature and the second ambient temperature.

The second ambient temperature may be the lowest temperature, the highest temperature or the average temperature of the driving moment in the weather forecast, and the like, which is not particularly limited herein.

Since there may be a difference in temperature throughout the battery pack of the vehicle, when the current battery temperature T2 is acquired, the acquired minimum temperature Tmin, maximum temperature Tmax, or average temperature may be selected as the current battery temperature T2 based on the values of a plurality of temperature sensors provided on the battery pack, which are not specifically defined herein, but the acquired maximum temperature Tmax of the battery pack is exemplified as the current battery temperature T2 in the following embodiments for the sake of brevity.

In the calculating process of step S120, the method for calculating the temperature cooling duration may be varied, an estimation method corresponding to the ambient temperature may be adopted, or a preset calculation formula may be used for calculation. For example, in one embodiment, the temperature cooling rate Sd of the battery pack after the battery pack is cooled by turning on the refrigeration device may be determined based on the cooling power P1 of the refrigeration device; and based on the temperature cooling rate Sd, calculating a temperature cooling time period required for starting the refrigeration equipment to cool the battery pack so as to cool the temperature of the battery pack from the current battery temperature T2 to the optimal temperature Ts.

In one embodiment, the temperature cooling rate Sd of the battery pack may be a fixed value determined based on the cooling power P1 of the refrigerating device; alternatively, since the temperature cooling rate of the battery pack is strongly related to the ambient temperature, the temperature cooling rate of the battery pack may be corrected based on the ambient temperature to obtain the temperature cooling rate P1 more conforming to the ambient temperature. For example, in one embodiment, a temperature cooling base rate S1 of the refrigeration device may be determined based on a cooling power of the refrigeration device; and then based on the obtained ambient temperature T1, correcting the temperature cooling basic rate S1 by using a first correction coefficient K1 corresponding to the ambient temperature, and calculating to obtain a temperature cooling rate Sd of the battery pack after starting the refrigeration equipment to cool the battery pack, wherein the temperature cooling rate Sd can be obtained by the following disclosure calculation:

Sd＝S1×K1

wherein, K1 may be obtained by querying from a preset mapping table, for example, as shown in the following table:

ambient temperature T1	＜35	[35；50]	＞50
				First oneCorrection coefficient K1	1	1.2	1.5

The temperature cooling rate Sd obtained after the ambient temperature correction can be more in line with the actual situation, so that more accurate temperature cooling duration can be calculated.

And based on the temperature cooling rate Sd, calculating a temperature cooling duration Δtd required for starting the refrigeration equipment to cool the battery pack so as to cool the temperature of the battery pack from the current battery temperature T2 to the optimal temperature Ts, wherein a formula for calculating the temperature cooling duration can be expressed as follows:

Δtd＝ΔT/Sd

where Δt is the temperature difference between the current battery temperature T2 cooled to the optimal temperature Ts.

Based on the cooling power P1 of the refrigeration device and the temperature cooling duration Δtd, the electric energy W1 consumed by the refrigeration device to cool the battery pack to an optimal temperature is calculated, where a formula for calculating the consumed electric energy may be represented as follows:

W1＝P1·Δtd

calculating a charging time period deltatc required for charging the battery pack based on the charging device to supplement the electric energy consumed by the refrigerating device based on the charging power P2 of the charging device, wherein a formula for calculating the charging time period can be expressed as follows:

Δtc＝W2/P1

wherein, W2 is the amount of electricity needed to be supplemented to charge the SOC of the battery pack to a preset value.

The charging power P2 may also be corrected based on the ambient temperature, for example, by looking up a table to obtain a second correction coefficient corresponding to the ambient temperature, and correcting the charging power based on the second correction coefficient, so as to obtain the charging power used in the actual calculation process.

The amount of power W2 to be replenished to charge the SOC of the battery pack to a preset value may be the same as or different from the amount of power W1 consumed to turn on the refrigeration device to cool the temperature of the battery pack to an optimal temperature. For example, if the SOC of the battery pack is equal to a preset value before the cooling device is turned on to cool the battery pack, w1=w2 may be considered; if the SOC of the battery pack is greater than or less than a preset value before the cooling device is turned on to cool the battery pack, it may be considered that W1 is not equal to W2. However, for simplicity of calculation, the charging time period is calculated by taking w1=w2 as an example in the following embodiments, and the calculation formula is as follows:

Δtc＝Q1/P1

after the temperature cooling duration Δtd and the charging duration Δtc are calculated, the opening time ts of the refrigeration device that is started in advance before the first time t1 when the battery pack supplies power to the external load may be determined.

Based on the above embodiment, by determining the temperature cooling rate, the temperature cooling duration Δtd and the consumed electric energy W1 are calculated, and the charging duration Δtc is calculated based on the consumed electric energy W1, so that the opening time ts for opening the refrigeration equipment can be calculated more accurately.

In one embodiment, due to a certain time difference between the second time t2 of triggering calculation and the start time ts of turning on the refrigerating device, other unexpected factors may occur during this time, for example, the user requires to turn on the air conditioner or other devices in advance to increase the power consumption of the battery pack, or sudden changes in the temperature of the battery pack due to abrupt environmental changes, etc. For this purpose, it is also possible to wake up the VCU in advance at a third time t3, for example, 10 minutes or half an hour, within a short time before the start time ts, to reacquire the current battery temperature and the ambient temperature, and to determine whether the above calculation process needs to be re-executed. For example, it may be compared whether the temperature difference between the current battery temperature and the ambient temperature acquired at the second time t2 and the third time t3 exceeds a preset temperature threshold, and if the temperature difference does not exceed the temperature threshold, the refrigeration device is started to cool the battery pack until the starting time t 2; if the temperature threshold value is exceeded, the calculation process is re-executed, the temperature cooling time required for starting the refrigeration equipment of the vehicle to cool the temperature of the battery pack to the optimal temperature is re-calculated, and the charging time required for recovering the SOC of the battery pack to the preset value is re-calculated, so that the starting time is re-determined and applied.

Referring to fig. 2, fig. 2 is a schematic architecture diagram of an in-vehicle control system according to an exemplary embodiment. As shown in fig. 2, the system may include a VCU 10, a vehicle-mounted communication terminal (T-BOX) 11, a heater 12, an On-Board Charge (OBC) 13, and the like, wherein the VCU 10, the T-BXO 11, and the heater 12 may communicate through a controller area network (Controller Area Network, CAN).

Referring to fig. 3, fig. 3 illustrates a method for thermal management of a battery pack implemented based on the above-mentioned vehicle-mounted control system, and as shown in fig. 3, the method for thermal management of a battery pack includes the following steps.

A1. The user parks, and a first time t1 of V2L is set through an application APP or a vehicle-mounted interaction system;

A2. a second time t2 preset for 3 hours before the first time t1 wakes up the VCU;

A3. judging whether the vehicle is in a gun inserting state or not; if the gun inserting state is in, executing the step A41-A71; if not, executing the step A42-A72;

A41. acquiring an ambient temperature T1 and a current battery temperature T2, and calculating a temperature cooling time delta td required for starting refrigeration equipment of the vehicle to cool the battery pack so as to cool the battery pack to an optimal temperature; and charging the battery pack based on the charging device to restore the SOC of the battery pack to a charging duration Δtc required for a preset value; determining a starting time ts for starting the refrigeration equipment in advance before a first time t1 for supplying power to an external load by the battery pack based on the temperature cooling time delta td and the charging time delta tc;

A51. when the starting time ts is reached, starting the refrigeration equipment to cool the battery pack;

A61. when the battery pack is cooled to the optimal temperature Ts, the refrigerating equipment is closed, and the SOC is started to charge the battery pack;

A71. when the first time t1 is reached, the charge of the battery pack reaches a preset value of SOC.

A42. Acquiring an ambient temperature T1 and a current battery temperature T2, calculating a temperature cooling time delta td required for starting the refrigeration equipment of the vehicle to cool the battery pack to an optimal temperature, and determining a starting time ts' for starting the refrigeration equipment in advance before a first time T1 for supplying power to an external load by the battery pack based on the temperature cooling time delta td;

A52. when the starting time ts' is reached, starting the refrigeration equipment to cool the battery pack;

A72. at the first time t1, the temperature of the battery pack is cooled to an optimal temperature.

Corresponding to the embodiments of the thermal management method of the battery pack described above, embodiments of the thermal management device of the battery pack are also provided.

As shown in fig. 4, the thermal management device of the battery pack includes: an acquisition module 401, a first calculation module 402 and a second calculation module 403.

The acquiring module 401 is configured to acquire a first time set by a user when the external load is powered by the vehicle-based battery pack; the first calculating module 402 is configured to calculate a temperature cooling time period required for turning on a refrigeration device of the vehicle to cool the battery pack so as to cool the temperature of the battery pack to an optimal temperature; and charging the battery pack based on the charging device to restore the SOC of the battery pack to a charging duration required for a preset value; the second calculating module 403 is configured to calculate, based on the temperature cooling duration and the charging duration, an opening time when the refrigeration device is opened in advance to cool the battery pack before the first time; and the time length between the starting time and the first time is not less than the sum of the temperature cooling time length and the charging time length.

Optionally, the first computing module 402 is configured to:

determining the temperature cooling rate of the battery pack after starting the refrigeration equipment to cool the battery pack based on the cooling power of the refrigeration equipment;

and based on the temperature cooling rate, calculating a temperature cooling time period required for starting the refrigeration equipment to cool the battery pack so as to cool the temperature of the battery pack to the optimal temperature.

Optionally, the first computing module 402 is configured to:

determining a temperature cooling base rate of the refrigeration device based on a cooling power of the refrigeration device;

and correcting the temperature cooling basic rate by using a first correction coefficient corresponding to the ambient temperature, and calculating to obtain the temperature cooling rate of the battery pack after the refrigeration equipment is started to cool the battery pack.

Optionally, the first computing module 402 is configured to:

based on the cooling power of the refrigeration equipment and the temperature cooling time, calculating electric energy consumed by the refrigeration equipment to cool the battery pack to the optimal temperature;

and calculating the charging time period required for charging the battery pack based on the charging equipment based on the charging power of the charging equipment so as to supplement the electric energy consumed by the refrigeration equipment.

Optionally, the first calculating module 402 is configured to wake up the vehicle control unit of the vehicle at a second time corresponding to a preset duration before the first time.

Fig. 5 is a schematic block diagram of an apparatus according to an exemplary embodiment. Referring to fig. 5, at the hardware level, the device includes a processor 502, an internal bus 504, a network interface 506, a memory 508, and a non-volatile storage 510, although other hardware requirements are also possible. One or more embodiments of the present description may be implemented in a software-based manner, such as by the processor 502 reading a corresponding computer program from the non-volatile storage 510 into the memory 508 and then running. Of course, in addition to software implementation, one or more embodiments of the present disclosure do not exclude other implementation manners, such as a logic device or a combination of software and hardware, etc., that is, the execution subject of the following processing flow is not limited to each logic unit, but may also be hardware or a logic device.

The system, apparatus, module or unit set forth in the above embodiments may be implemented in particular by a computer chip or entity, or by a product having a certain function. A typical implementation device is a computer, which may be in the form of a personal computer, laptop computer, cellular telephone, camera phone, smart phone, personal digital assistant, media player, navigation device, email device, game console, tablet computer, wearable device, or a combination of any of these devices.

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

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

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 storage media for a computer 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, read only compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic disk storage, quantum memory, graphene-based storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by the computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transmission media), such as modulated data signals and carrier waves.

It should be noted that, the user information (including but not limited to user equipment information, user personal information, etc.) and the data (including but not limited to data for analysis, stored data, presented data, etc.) related to the present application are information and data authorized by the user or fully authorized by each party, and the collection, use and processing of the related data need to comply with the related laws and regulations and standards of the related country and region, and provide corresponding operation entries for the user to select authorization or rejection.

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 one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.

The foregoing describes specific embodiments of the present disclosure. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims can be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

The terminology used in the one or more embodiments of the specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the one or more embodiments of the specification. As used in this specification, one or more embodiments and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.

It should be understood that although the terms first, second, third, etc. may be used in one or more embodiments of the present description to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of one or more embodiments of the present description. The word "if" as used herein may be interpreted as "at … …" or "at … …" or "responsive to a determination", depending on the context.

The foregoing description of the preferred embodiment(s) is (are) merely intended to illustrate the embodiment(s) of the present invention, and it is not intended to limit the embodiment(s) of the present invention to the particular embodiment(s) described.

Claims

1. A method of thermal management of a battery pack, the method comprising:

calculating a temperature cooling time period required for starting a refrigeration device of the vehicle to cool the battery pack so as to cool the temperature of the battery pack to an optimal temperature; and charging the battery pack based on a charging device to restore the SOC of the battery pack to a charging duration required for a preset value;

2. The method of claim 1, wherein the calculating a temperature cooling time period required to turn on a refrigeration device of the vehicle to cool the battery pack to cool the temperature of the battery pack to an optimal temperature comprises:

3. The method of claim 2, wherein determining a temperature cooling rate of the battery pack after turning on the refrigeration device to cool the battery pack based on the cooling power of the refrigeration device comprises:

4. The method of claim 2, wherein the calculating a charge duration required to charge the battery pack based on the charging device to restore the SOC of the battery pack to a preset value comprises:

5. The method according to claim 1, comprising, before calculating a temperature cooling time period required to turn on a refrigeration device of the vehicle to cool the battery pack to an optimal temperature,:

and waking up the whole vehicle control unit of the vehicle at a second moment corresponding to the preset time before the first moment.

6. A thermal management device for a battery pack, the device comprising:

the first calculation module is used for calculating a temperature cooling time period required for starting the refrigeration equipment of the vehicle to cool the battery pack so as to cool the temperature of the battery pack to an optimal temperature; and charging the battery pack based on a charging device to restore the SOC of the battery pack to a charging duration required for a preset value;

7. The apparatus of claim 6, wherein the first computing module is to:

8. The apparatus of claim 7, wherein the first computing module is to:

9. A computer readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements the steps of the method of any of claims 1-5.

10. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the method of any of claims 1-5 when the program is executed.