CN110752417A

CN110752417A - Battery device, control method, control device and battery system

Info

Publication number: CN110752417A
Application number: CN201911026174.4A
Authority: CN
Inventors: 汪魁; 杨蓉; 李大全; 王振雨
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2019-10-25
Filing date: 2019-10-25
Publication date: 2020-02-04

Abstract

The application provides a battery device, a control method, a control device and a battery system, wherein the device comprises: the battery assembly comprises a battery body and a cold liquid pipe group positioned on one side of the battery body; the cold accumulation device comprises a cold accumulation assembly and a cold end fluid distributor, wherein the cold accumulation assembly comprises a cold accumulator and a permanent magnet structure; and the driving assembly is used for driving the permanent magnet structure and/or the regenerator to move so as to enable the permanent magnet structure and the regenerator to move relatively. In the device, the cold junction export can be with cold liquid nest of tubes intercommunication break-make ground, can be in order to control the break-make of cold junction export and cold liquid nest of tubes according to actual conditions to avoided magnetic refrigeration equipment direct and battery pack intercommunication, caused short-term temperature fluctuation and influenced battery pack's temperature homogeneity. In addition, the device adopts the permanent magnet structure to provide a magnetic field, and compared with a superconducting magnet and an electromagnet, the permanent magnet structure is simple, the manufacturing cost is low, and cooling is not needed.

Description

Battery device, control method, control device and battery system

Technical Field

The application relates to the field of new energy power batteries, in particular to a battery device, a control method, a control device, a storage medium, a processor and a battery system.

Background

With the development and popularization of new energy city buses, the energy density of the power battery is improved year by year, the consumption of the power battery is also enlarged year by year, and people continuously raise higher requirements on the endurance mileage of new energy automobiles. The battery generates a large amount of heat and has a high temperature, which adversely affects the battery capacity, the battery life, and the like. The power battery used as a core component of the electric automobile is greatly influenced by the ambient temperature, so a battery device is needed to control the battery to be at a better working ambient temperature.

The traditional battery device adopts a vapor compression refrigeration mode, comprises a refrigeration loop and a cooling liquid loop, and mainly comprises a compressor, a condenser, an expansion valve, an evaporator, a refrigerant, an air conditioning pipeline, a water pump, an electromagnetic valve, a water tank, a radiator, a heater and the like. The system has more parts, so that the whole system occupies large space and is inconvenient to maintain.

With the increasingly obvious disadvantages of the traditional vapor compression refrigeration technology in terms of environmental unfriendliness and heat exchange efficiency, the research and development of novel refrigeration technology (non-vapor compression refrigeration) is pressing.

The magnetic refrigeration technology is one of the novel refrigeration technologies with the best development prospect, particularly has outstanding advantages in the aspects of environmental friendliness and high efficiency, and compared with the traditional vapor compression refrigeration, the refrigeration efficiency of the magnetic refrigeration can reach 40-50% of Carnot cycle efficiency and is about 30% higher than that of the traditional compression refrigeration mode; the external magnetic refrigeration mode adopts magnetic materials to carry out solid-liquid heat exchange, and gas harmful to the environment can not be generated; and the magnetic refrigeration device has low operating frequency and generates small noise. With the above advantages, the magnetic refrigeration technology has become a new refrigeration technology which has received the highest attention in recent years.

If the cold and hot end heat exchange fluid of the magnetic refrigeration is directly communicated with the battery assembly, the temperature uniformity of the battery assembly is influenced due to short-term temperature fluctuation, and in addition, the temperature control is not intelligent enough. If a non-independent battery device or a system sharing the hot and cold water is adopted, the opening state of the air conditioner is limited, and the constant temperature of the battery assembly is not kept.

The above information disclosed in this background section is only for enhancement of understanding of the background of the technology described herein and, therefore, certain information may be included in the background that does not form the prior art that is already known in this country to a person of ordinary skill in the art.

Disclosure of Invention

The present application mainly aims to provide a battery device, a control method, a control device, a storage medium, a processor and a battery system, so as to solve the problem of low temperature control accuracy of the battery device in the prior art.

In order to achieve the above object, according to one aspect of the present application, there is provided a battery device including: the battery assembly comprises a battery body and a cold liquid pipe group positioned on one side of the battery body; the cold accumulation device comprises a cold accumulation assembly and a cold end fluid distributor, wherein the cold accumulation assembly comprises a cold accumulator and a permanent magnet structure, the cold accumulator comprises a solid magnetic working medium, the permanent magnet structure is positioned on at least one side of the cold accumulator in a first direction, the cold end fluid distributor is positioned on one side of the cold accumulation device in a second direction, the cold end fluid distributor is used for containing and distributing heat exchange fluid, the cold end fluid distributor is provided with a cold end outlet and a cold end inlet, the cold end outlet can be communicated with the cold liquid pipe group in an on-off mode, and the first direction is the height direction of the cold accumulation device; and the driving assembly is used for driving the permanent magnet structure and/or the regenerator to move so as to enable the permanent magnet structure and the regenerator to move relatively.

Further, the battery assembly further comprises a hot liquid pipe set, and the hot liquid pipe set is positioned on one side of the battery body, which is far away from the cold liquid pipe set; the cold accumulation device further comprises a hot end fluid distributor, the hot end fluid distributor is located on one side, far away from the cold end fluid distributor, of the cold accumulation device and used for containing and distributing heat exchange fluid, the hot end fluid distributor is provided with a hot end outlet and a hot end inlet, and the hot end outlet can be communicated with the hot end pipe group in an on-off mode.

Further, the battery device further includes: one end of the first heat exchanger is communicated with the cold end outlet in a switching mode, and the other end of the first heat exchanger is communicated with the cold end inlet; and one end of the second heat exchanger is communicated with the hot end outlet in a break-and-break mode, and the other end of the second heat exchanger is communicated with the hot end inlet.

Further, the pipeline between the first heat exchanger and the cold end outlet is a first pipeline, the pipeline between the cold liquid pipe group and the cold end outlet is a second pipeline, the pipeline between the second heat exchanger and the hot end outlet is a third pipeline, the pipeline between the hot liquid pipe group and the hot end outlet is a fourth pipeline, and the battery device further includes: the first three-way valve is partially positioned on the first pipeline and partially positioned on the second pipeline and used for controlling the on-off of the first pipeline and the on-off of the second pipeline; and the second three-way valve is partially positioned on the third pipeline and partially positioned on the fourth pipeline and is used for controlling the on-off of the third pipeline and the on-off of the fourth pipeline.

Further, the battery device further includes: a first temperature detector in communication with the battery assembly for detecting a temperature of the battery assembly; a second temperature detector in communication with the cold end outlet for detecting a temperature of the heat exchange fluid at the cold end outlet; and the third temperature detector is communicated with the hot end outlet and is used for detecting the temperature of the heat exchange fluid at the hot end outlet.

Further, the battery device further includes: and the pump assembly is positioned on a pipeline between the hot end outlet and the hot end inlet, and comprises a pump body and a rotating speed controller electrically connected with the pump body, wherein the rotating speed controller is used for controlling the rotating speed of the pump body.

Further, the cold accumulation assembly comprises a plurality of permanent magnet structures and a plurality of cold accumulators, at least one permanent magnet structure is arranged on two sides of each cold accumulator, the cold accumulation assembly further comprises a rotating shaft, and the rotating shaft is connected with at least one permanent magnet structure.

Furthermore, there are two groups of cold accumulators, each cold accumulator group includes at least one cold accumulator, there are two permanent magnet structures, which are an inner magnet structure and an outer magnet structure, respectively, wherein the outer magnet structure is located at the circumferential outer side of the inner magnet structure, the cold accumulator group is located between the outer magnet structure and the inner magnet structure, and the cold accumulator groups are arranged at intervals.

Further, the drive assembly includes: a motor; one end of the transmission structure is electrically connected with the motor, and the other end of the transmission structure is connected with the rotating shaft; and the motor controller is electrically connected with the motor and used for controlling the rotating speed of the motor.

Further, the pipeline between the first heat exchanger and the cold end outlet is a first pipeline, the pipeline between the cold liquid pipe group and the cold end outlet is a second pipeline, and the first three-way valve comprises: a first control valve located only on the first line; a second control valve located only on the second line; the pipeline between the second heat exchanger and the hot end outlet is a third pipeline, the pipeline between the hot water pipe group and the hot end outlet is a fourth pipeline, and the second three-way valve comprises: a third control valve located only on the third line; a fourth control valve located only on the fourth line.

According to another aspect of the present application, there is provided a control method including: collecting a first temperature, wherein the first temperature is the temperature of the battery assembly; the first temperature is differenced with a preset temperature to obtain a temperature difference; and controlling at least the cold end outlet to be communicated with the cold liquid pipe group under the condition that the temperature difference is larger than or equal to the maximum value of the first preset range, so that the battery device enters a second control mode.

Further, the battery assembly further includes a hot-liquid tube group located on a side of the battery body away from the cold-liquid tube group, the cold storage device further includes a hot-end fluid distributor located on a side of the cold storage device away from the cold-end fluid distributor, the hot-end fluid distributor is used for containing and distributing heat exchange fluid, the hot-end fluid distributor has a hot-end outlet and a hot-end inlet, and the hot-end outlet is in on-off communication with the hot-liquid tube group, and the method includes: and under the condition that the temperature difference is smaller than or equal to the minimum value of the first preset range, at least controlling a hot end outlet to be communicated with a hot water pipe group, so that the battery device enters a third control mode.

Further, in the event that the temperature difference is greater than a maximum value of a first predetermined range, controlling at least the cold end outlet to communicate with a cold liquid tube set such that the battery device enters a second control mode, comprising: under the condition that the temperature difference is within a second preset range and is greater than or equal to the maximum value of the first preset range, controlling the rotating speed of the cold accumulation device within a first rotating speed range so that the battery device enters a first control sub-mode of the second control mode; and under the condition that the temperature difference is larger than the maximum value of the second preset range, controlling the rotating speed of the cold accumulation device to be in a second rotating speed range so that the battery device enters a second control sub-mode of the second control mode, wherein the maximum value of the first rotating speed range is smaller than the minimum value of the second rotating speed range.

Further, in a case that the temperature difference is less than or equal to a minimum value of the first predetermined range, controlling a hot end outlet to communicate with a hot pipe group so that the battery device enters a third control mode, including: in a case where the temperature difference is within a second predetermined range and is less than or equal to a minimum value of the first predetermined range, controlling the rotational speed of the cold storage device within a third rotational speed range such that the battery device enters a third control sub-mode of the third control mode, wherein the first predetermined range is included in the second predetermined range, the minimum value of the first predetermined range is greater than the minimum value of the second predetermined range, and the maximum value of the first predetermined range is less than the maximum value of the second predetermined range; and under the condition that the temperature difference is smaller than the minimum value of the second preset range, controlling the rotating speed of the cold accumulation device to be within a fourth rotating speed range, so that the battery device enters a fourth control sub-mode of the third control mode, and the maximum value of the third rotating speed range is smaller than the minimum value of the fourth rotating speed range.

Further, in the case where the temperature difference is greater than the maximum value of the first predetermined range, controlling at least the cold-end outlet to communicate with the cold-liquid tube group so that the battery device enters a second control mode, the control method further includes: detecting a second temperature when the temperature difference is greater than a maximum value of a first predetermined range, the second temperature being a temperature of the heat exchange fluid at the cold end outlet; and under the condition that the second temperature is lower than the first temperature, at least controlling a cold end outlet to be communicated with a cold liquid pipe group so that the battery device enters a second control mode.

Further, in a case that the temperature difference is smaller than or equal to the minimum value of the first predetermined range, at least a hot end outlet is controlled to be communicated with a hot pipe group, so that the battery device enters a third control mode, and the control method further includes: detecting a third temperature when the temperature difference is less than or equal to the minimum value of the first preset range, wherein the third temperature is the temperature of the heat exchange fluid at the hot end outlet; and under the condition that the third temperature is higher than the first temperature, at least controlling a hot end outlet to be communicated with a hot pipe group, so that the battery device enters a third control mode.

Further, the driving assembly includes a motor, a transmission structure and a motor controller, wherein one end of the transmission structure is electrically connected with the motor, the other end of the transmission structure is connected with the rotating shaft, and when the temperature difference is within a second predetermined range and is greater than or equal to the maximum value of the first predetermined range, the rotating speed of the cold storage device is controlled within a first rotating speed range, including: controlling the rotation speed of the motor within the first rotation speed range; controlling the rotational speed of the cold storage apparatus within a second rotational speed range in the case where the temperature difference is greater than the maximum value of the second predetermined range, including: and controlling the rotating speed of the motor to be in the second rotating speed range.

Further, the battery device further includes a pump assembly that is located on a pipeline between the hot end outlet and the hot end inlet, the pump assembly includes a pump body, and when the temperature difference is within the second predetermined range and is less than or equal to a minimum value of the first predetermined range, the rotational speed of the cold storage device is controlled within a third rotational speed range, so that the battery device enters a third control sub-mode of the third control mode, the battery device further includes: controlling the rotating speed of the pump body within a fifth rotating speed range; in a case where the temperature difference is smaller than a minimum value of the second predetermined range, controlling the rotational speed of the cold storage apparatus within a fourth rotational speed range so that the battery device enters a fourth control sub-mode of the third control mode, further comprising: and controlling the rotating speed of the pump body within a sixth rotating speed range, wherein the maximum value of the fifth rotating speed range is smaller than the minimum value of the sixth rotating speed range.

Further, before the battery device enters the second control mode or the third control mode, the method includes: and controlling the cold end outlet not to be communicated with the cold liquid pipe group and controlling the hot end outlet not to be communicated with the hot liquid pipe group, so that the battery device enters a first control mode.

Further, causing the battery device to enter the first control mode further includes: under the condition that the temperature difference is in a second preset range, controlling the rotating speed of the cold accumulation device to be in a seventh rotating speed range so that the battery device enters a first sub-mode of a first control mode; and under the condition that the temperature difference is not in a second preset range, controlling the rotating speed of the cold accumulation device to be in an eighth rotating speed range, and controlling to enter a second sub-mode of the first control mode, wherein the maximum value of the seventh rotating speed range is smaller than the minimum value of the eighth rotating speed range.

Further, after entering the control sub-mode, the second control sub-mode, the third control sub-mode or the fourth control sub-mode and operating for a predetermined time, the method further includes: and detecting a first temperature, and controlling the rotating speed of the cold accumulation device to be in a seventh rotating speed range under the condition that the temperature difference is in the first preset range, so that the battery device enters a first sub-mode of a first control mode.

According to still another aspect of the present application, there is provided a control apparatus including a collecting unit for collecting a first temperature, the first temperature being a temperature of a battery pack; the calculating unit is used for making a difference between the first temperature and a preset temperature to obtain a temperature difference; and the first control unit is used for controlling at least the cold end outlet to be communicated with the cold liquid pipe group under the condition that the temperature difference is larger than the maximum value of the first preset range, so that the battery device enters a second control mode.

According to still another aspect of the present application, there is provided a storage medium including a stored program, wherein the program executes any one of the control methods.

According to yet another aspect of the present application, there is provided a processor for executing a program, wherein the program executes any one of the control methods.

According to still another aspect of the present application, there is provided a battery system including: any one of the battery devices; control means for executing any one of the control methods.

Use the technical scheme of this application, drive assembly can be so that produce relative motion between permanent magnet structure and the regenerator, and then can add magnetism or demagnetization to the regenerator for solid magnetic medium in the regenerator takes place the magnetocaloric effect and dispels the heat or absorbs the heat, can take the cold volume of its production to battery body one side including the cold liquid nest of tubes through the heat transfer fluid in the cold junction fluid distributor, realizes refrigerating. In the device, but above-mentioned cold junction export break-make ground with above-mentioned cold liquid nest of tubes intercommunication, can be with the break-make of cold junction export and above-mentioned cold liquid nest of tubes according to actual conditions control to avoided magnetic refrigeration equipment direct and battery pack intercommunication, caused short-term temperature fluctuation and influenced battery pack's temperature homogeneity. In addition, the device adopts the permanent magnet structure to provide a magnetic field, and compared with a superconducting magnet and an electromagnet, the permanent magnet structure is simple, the manufacturing cost is low, and cooling is not needed. In addition, the magnetic working medium in the regenerator is a solid magnetic working medium, and compared with a liquid magnetic working medium, the solid magnetic working medium is mature in industry, and the density of the magnetic working medium is high under the same volume. The invention is also suitable for a liquid magnetic working medium (one type of magnetic fluid), has the advantages of convenient heat exchange and no secondary refrigerant (the heat exchange fluid in the invention) compared with a solid magnetic working medium, and uses a magnetic refrigeration system as a heat management system of the automobile power battery compared with the traditional vapor compression type refrigerant system, so that the system has fewer parts, and further the whole system has small occupied space and convenient maintenance.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:

fig. 1 shows a schematic structural diagram of a battery device according to an embodiment of the present application;

fig. 2 shows a schematic diagram of a battery device according to an embodiment of the present application in a first control mode;

fig. 3 shows a schematic diagram of a battery device according to an embodiment of the present application in a second control mode;

fig. 4 shows a schematic diagram of a battery device in a third control mode according to an embodiment of the present application;

FIG. 5 shows a flow chart of a control method according to an embodiment of the application; and

FIG. 6 shows a flow chart of yet another control method according to an embodiment of the application.

Wherein the figures include the following reference numerals:

100. a battery assembly; 101. a cold liquid tube bank; 102. a hydrothermal pipe bank; 103. a first temperature detector; 201. an inner magnet structure; 202. a regenerator; 203. an outer magnet structure; 301. a cold side fluid distributor; 302. a hot side fluid distributor; 400. a first heat exchanger; 401. a second temperature detector; 501. a cold end outlet; 502. a cold end inlet; 503. a hot end outlet; 504. a hot end inlet; 600. a first three-way valve; 601. a first control valve; 602. a second control valve; 700. a second three-way valve; 701. a third control valve; 702. a fourth control valve; 800. a second heat exchanger; 801. a third temperature detector; 910. a motor; 911. a motor controller; 912. a transmission structure; 913. a rotating shaft; 920. a pump body; 921. a rotational speed controller.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but 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 application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. Also, in the specification and claims, when an element is described as being "connected" to another element, the element may be "directly connected" to the other element or "connected" to the other element through a third element.

As described in the background of the invention, in the prior art, a magnetic refrigeration device is directly connected to a battery assembly, which may affect the temperature uniformity of the battery assembly due to short-term temperature fluctuation.

Fig. 1 is a schematic diagram of a battery device according to an embodiment of the present application. As shown in fig. 1, the apparatus includes:

the battery pack 100 comprises a battery body and a cold liquid pipe group 101 positioned on one side of the battery body;

a cold storage device, including a cold storage assembly and a cold end fluid distributor 301, where the cold storage assembly includes a cold storage device 202 and a permanent magnet structure, where the cold storage device 202 includes a solid magnetic working medium, in a first direction, the permanent magnet structure is located on at least one side of the cold storage device 202, in a second direction, the cold end fluid distributor 301 is located on one side of the cold storage device, the cold end fluid distributor 301 is used for holding and distributing a heat exchange fluid, the cold end fluid distributor 301 has a cold end outlet 501 and a cold end inlet 502, the cold end outlet 501 is in communication with the cold liquid pipe group 101 in an on-off manner, the first direction is a height direction of the cold storage device, in a specific embodiment, the cold storage device is a cylinder, the first direction is a radial direction of the cold storage device, and the second direction is an axial direction of the cold storage device;

and a driving assembly for driving the permanent magnet structure and/or the regenerator 202 to move so that the permanent magnet structure and the regenerator 202 move relatively.

In this scheme, drive assembly can make and produce relative motion between permanent magnet structure and the regenerator, and then can add magnetism or demagnetize the regenerator for solid magnetic working medium in the regenerator takes place the magnetocaloric effect and dispels the heat or absorb the heat, and the cold volume that can produce through the heat transfer fluid in the cold junction fluid distributor can be taken to battery body one side and is included the cold liquid nest of tubes, realizes refrigerating. In the device, but above-mentioned cold junction export break-make ground with above-mentioned cold liquid nest of tubes intercommunication, can be with the break-make of cold junction export and above-mentioned cold liquid nest of tubes according to actual conditions control to avoided magnetic refrigeration equipment direct and battery pack intercommunication, caused short-term temperature fluctuation and influenced battery pack's temperature homogeneity. In addition, the device adopts the permanent magnet structure to provide a magnetic field, and compared with a superconducting magnet and an electromagnet, the permanent magnet structure is simple, the manufacturing cost is low, and cooling is not needed. In addition, the magnetic working medium in the regenerator is a solid magnetic working medium, and compared with a liquid magnetic working medium, the solid magnetic working medium is mature in industry, and the density of the magnetic working medium is high under the same volume. The invention is also suitable for a liquid magnetic working medium (one type of magnetic fluid), has the advantages of convenient heat exchange and no secondary refrigerant (the heat exchange fluid in the invention) compared with a solid magnetic working medium, and uses a magnetic refrigeration system as a heat management system of the automobile power battery compared with the traditional vapor compression type refrigerant system, so that the system has fewer parts, and further the whole system has small occupied space and convenient maintenance.

In order to further precisely control the temperature of the battery assembly, in an embodiment of the present application, as shown in fig. 1, the battery assembly 100 further includes a hot stack 102, the hot stack 102 is located on a side of the battery body away from the cold stack 101; the cold storage device further comprises a hot end fluid distributor 302, the hot end fluid distributor 302 is located on one side of the cold storage device far away from the cold end fluid distributor 301, the hot end fluid distributor 302 is used for containing and distributing heat exchange fluid, the hot end fluid distributor 302 is provided with a hot end outlet 503 and a hot end inlet 504, and the hot end outlet 503 can be in on-off communication with the hot end pipe group 102. In this way, the heat generated by the heat exchange fluid in the hot side fluid distributor 302 can be carried to one side of the cell body including the hot side tube bank 102, so as to realize heating. Specifically, when the temperature in battery assembly 100 is too low, hot water tube set 102 and hot end outlet 503 are communicated, so that the temperature of the heat exchange fluid in hot water tube set 102 of battery assembly 100 is increased, and the temperature in battery assembly 100 is increased. It should be noted that the hot liquid tube bank and the cold liquid tube bank are not far away from each other, but rather are arranged in the battery compartment independently and preferably uniformly.

In an embodiment of the present application, as shown in fig. 1, the battery device further includes a first heat exchanger 400 and a second heat exchanger 800, one end of the first heat exchanger 400 is in on-off communication with the cold end outlet 501, and the other end is in communication with the cold end inlet 502; one end of the second heat exchanger 800 is in on-off communication with the hot side outlet 503 and the other end is in communication with the hot side inlet 504. In the event that the cell assembly 100 does not require refrigeration, the cold side outlet 501 is placed in communication with the first heat exchanger 400, i.e., the heat exchange fluid in the cold side fluid distributor 301 is placed in heat exchange relationship with the fluid in the first heat exchanger 400. In the case where the battery assembly 100 does not require heating, the hot side outlet 503 is brought into communication with the second heat exchanger 800, i.e., the heat exchange fluid in the hot side fluid distributor 302 is brought into heat exchange relationship with the fluid in the second heat exchanger 800. Therefore, under the condition that the battery assembly 100 does not need to be cooled or heated, the cold end outlet 501 is communicated with the first heat exchanger 400, and the hot end outlet 503 is communicated with the second heat exchanger 800, so that direct communication between the magnetic refrigeration equipment and the battery assembly 100 can be further avoided, and the temperature uniformity of the battery assembly 100 is ensured.

In an embodiment of the present application, as shown in fig. 1, a pipeline between the first heat exchanger 400 and the cold-end outlet 501 is a first pipeline, a pipeline between the cold-liquid tube group 101 and the cold-end outlet 501 is a second pipeline, a pipeline between the second heat exchanger 800 and the hot-end outlet 503 is a third pipeline, and a pipeline between the hot-liquid tube group 102 and the hot-end outlet 503 is a fourth pipeline, as shown in fig. 1, the battery device further includes a first three-way valve 600 and a second three-way valve 700, where a part of the first three-way valve 600 is located on the first pipeline and a part of the first three-way valve is located on the second pipeline, and is configured to control on/off of the first pipeline and on/off of the second pipeline; when the second cold end valve is opened, the second pipeline is in a connection state, that is, the cold end outlet 501 is connected with the cold liquid pipe group 101. The accurate control of the temperature in the battery assembly 100 is realized by controlling the on-off of the first cold end valve and the second cold end valve of the first three-way valve 600; the second three-way valve 700 is partially located on the third pipeline and partially located on the fourth pipeline, and is used for controlling the on-off of the third pipeline and the on-off of the fourth pipeline. The on-off of the four pipelines is realized through the two three-way valves, so that the refrigeration, non-heating or heating is realized.

In an embodiment of the present application, as shown in fig. 1, a pipeline between the first heat exchanger 400 and the cold-side outlet 501 is a first pipeline, a pipeline between the cold-liquid pipe group 101 and the cold-side outlet 501 is a second pipeline, a pipeline between the second heat exchanger 800 and the hot-side outlet 503 is a third pipeline, and a pipeline between the hot-liquid pipe group 102 and the hot-side outlet 503 is a fourth pipeline, as shown in fig. 1, the first three-way valve 600 includes a first control valve 601 and a second control valve 602, the first control valve 601 is only located on the first pipeline, and the second control valve 602 is only located on the second pipeline. The second three-way valve 700 includes a third control valve 701 and a fourth control valve 702, and the third control valve 701 is only located on the third line; the fourth control valve 702 is located only on the fourth line. The first control valve 601 is also called a first cold end valve, the second control valve 602 is also called a second cold end valve, the third control valve 701 is also called a first hot end valve, and the fourth control valve 702 is also called a second hot end valve, when the first cold end valve is opened, the first pipeline is in a connection state, that is, the cold end outlet 501 is connected with the first heat exchanger 400; when the second cold end valve is opened, the second pipeline is in a connection state, that is, the cold end outlet 501 is connected with the cold liquid pipe group 101. The accurate control of the temperature in the battery assembly 100 is realized by controlling the on-off of the first cold end valve and the second cold end valve of the first three-way valve 600; the second three-way valve 700 includes a first hot end valve and a second hot end valve, and when the first hot end valve is opened, the third pipeline is in a connection state, that is, the hot end outlet 503 is connected with the second heat exchanger 800; when the second hot end valve is opened, the fourth pipeline is in a connected state, that is, the hot end outlet 503 is connected to the hot water pipe group 102, and the temperature in the battery assembly 100 is controlled by controlling the connection and disconnection of the first hot end valve and the second hot end valve of the second three-way valve 700.

In an embodiment of the present application, as shown in fig. 1, the battery device further includes a first temperature detector 103, a second temperature detector 401, and a third temperature detector 801, wherein the first temperature detector 103 is in communication with the battery assembly 100 and is configured to detect a temperature of the battery assembly 100; a second temperature detector 401 is communicated with the cold end outlet 501 and is used for detecting the temperature of the heat exchange fluid at the cold end outlet 501; a third temperature detector 801 is in communication with the hot side outlet 503 and is configured to detect a temperature of the heat exchange fluid at the hot side outlet 503. The temperature of the battery assembly 100, the temperature of the heat exchange fluid at the cold end outlet 501 and the temperature of the heat exchange fluid at the hot end outlet 503 are detected to obtain detection results, and the on-off states of the first three-way valve 600 and the second three-way valve 700 are controlled according to the detection results, so that the temperature of the battery assembly 100 is accurately controlled.

The first temperature detector, the second temperature detector and the third temperature detector of the present application may be any devices that implement the above-mentioned detection function, and in an embodiment of the present application, the first temperature detector, the second temperature detector and the third temperature detector are all temperature sensing bulbs.

In one embodiment of the present application, as shown in fig. 1, the battery device further includes a pump assembly, which is located on a pipeline between the hot end outlet 503 and the hot end inlet 504 because the pump assembly generates heat during operation, and the pump assembly includes a pump body 920 and a rotation speed controller 921 electrically connected to the pump body, and the rotation speed controller is configured to control a rotation speed of the pump body. The rotational speed of the pump body is controlled by the rotational speed controller to control the flow rate of the heat exchange fluid, and the flow rate of the heat exchange fluid is correspondingly controlled according to the detection result of the first temperature detector 103 and the detection result of the third temperature detector 801, so that the temperature of the battery assembly 100 can be controlled more accurately and rapidly. The pump assembly described above is preferably arranged between the warm end outlet 503 and the second three-way valve 700, since the pump assembly itself generates heat, the arrangement at the cold end having an effect on the cold produced. Is arranged between the hot side outlet 503 and the second heat exchanger (hot side heat exchanger) to facilitate the heat exchange fluid to dissipate the heat generated by the pump assembly itself and then flow in from the hot side inlet 504.

In an embodiment of the present application, as shown in fig. 1, the cold storage assembly includes a plurality of the permanent magnet structures and a plurality of the cold storages 202, at least one of the permanent magnet structures is disposed on both sides of each of the cold storages 202, and the cold storage assembly further includes a rotating shaft 913, and the rotating shaft 913 is connected to at least one of the permanent magnet structures.

In one embodiment of the present application, as shown in fig. 1, there are two groups of the above-mentioned regenerators 202, each of the two groups of the above-mentioned regenerators 202 includes at least one above-mentioned regenerator 202, and there are two above-mentioned permanent magnet structures, namely, an inner magnet structure 201 and an outer magnet structure 203, wherein the above-mentioned outer magnet structure 203 is located at the circumferential outer side of the above-mentioned inner magnet structure 201, and the above-mentioned regenerator 202 group is located between the above-mentioned outer magnet structure 203 and the above-mentioned inner magnet structure 201, specifically, at least one of the above-mentioned inner magnet structure and outer magnet structure includes a permanent magnet material (the outer magnet structure may include a permanent magnet material, the inner magnet structure may include a magnet material, the inner magnet structure and the outer magnet structure include a permanent magnet material. Specifically, a person skilled in the art can set the specific number of the regenerators 202 in each regenerator 202 group according to actual conditions.

In an embodiment of the present application, as shown in fig. 1, the driving assembly includes a motor 910, a transmission structure 912 and a motor controller 911, wherein one end of the transmission structure 912 is electrically connected to the motor 910, and the other end is connected to the rotating shaft 913; the motor 910 controller is electrically connected to the motor 910 for controlling the rotation speed of the motor 910. The rotating speed of the motor 910 is controlled by the motor 910 controller, so that the relative movement speed between the permanent magnet structure and the regenerator 202 is controlled, the magnetizing and demagnetizing control is realized, the temperature of the heat exchange fluid is controlled, and the refrigeration and heating are realized.

Of course, the driving assembly of the present application is not limited to the above-mentioned structure, and may be any other feasible structure, and those skilled in the art may select a driving assembly with a suitable structure according to the actual situation.

According to another exemplary embodiment of the present application, there is provided a control method that is the control method of the above-described battery device.

Fig. 5 is a flowchart of a control method according to an embodiment of the present application. As shown in fig. 5, the method comprises the steps of:

step S101, collecting a first temperature, wherein the first temperature is the temperature of a battery pack;

step S102, making a difference between the first temperature and a preset temperature to obtain a temperature difference;

and step S103, under the condition that the temperature difference is larger than the maximum value of the first preset range, at least controlling a cold end outlet to be communicated with a cold liquid pipe group, so that the battery device enters a second control mode.

In this application, obtain the temperature difference through the temperature and the predetermined temperature of calculating battery pack, and then according to the size of temperature difference, carry out corresponding control, specifically, under the circumstances that above-mentioned temperature difference is greater than the maximum value of first predetermined range, battery pack's temperature is higher promptly, need carry out refrigeration control promptly, and then control cold junction export and cold liquid nest of tubes intercommunication, and then realize the control to the temperature of the heat transfer fluid in the cold liquid nest of tubes to realize the refrigeration to battery pack.

It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than presented herein.

In one embodiment of the present application, the battery assembly further includes a hot stack disposed on a side of the battery body away from the cold stack, and the cold storage device further includes a hot fluid distributor disposed on a side of the cold storage device away from the cold fluid distributor, the hot fluid distributor being configured to receive and distribute a heat exchange fluid, the hot fluid distributor having a hot outlet and a hot inlet, the hot outlet being in open-close communication with the hot stack, the method includes, as shown in fig. 6, controlling at least the hot outlet to communicate with the hot stack such that the battery device enters a third control mode when the temperature difference is less than or equal to a minimum value of the first predetermined range, that is, △ T ≦ b2, controlling the hot outlet to communicate with the hot stack such that the temperature of the battery device is lower, the battery assembly needs to be heated, and the hot outlet is communicated with the hot stack, thereby controlling the temperature of the hot stack in the hot stack to control the temperature of the hot stack.

In an embodiment of this application, through control cold junction export and cold liquid nest of tubes intercommunication, and then realize the control to the heat transfer fluid's in the cold liquid nest of tubes temperature, and then realize the refrigeration control to battery pack, perhaps, through control hot junction export and hydrothermal nest of tubes intercommunication, and then realize the control to the heat transfer fluid's in the hydrothermal nest of tubes temperature, and then realize the heating control to battery pack, through refrigeration control and heating control's independent control, realized the accurate control to battery pack temperature.

In one embodiment of the present application, as shown in FIG. 6, in the case where the temperature difference is greater than or equal to the maximum value of the first predetermined range, i.e., b2 ≦ △ T, controlling at least the cold side outlet in communication with the cold liquid tube group so that the battery device enters the second control mode includes controlling the rotational speed of the cold storage apparatus in the first rotational speed range so that the battery device enters the first control sub-mode of the second control mode in the case where the temperature difference is within the second predetermined range and greater than or equal to the maximum value of the first predetermined range, i.e., b2 ≦ △ T ≦ c, and controlling the rotational speed of the cold storage apparatus in the second rotational speed range so that the battery device enters the second control sub-mode of the second control mode in the case where the temperature difference is greater than the maximum value of the second predetermined range, i.e., c < △ T, so that the rotational speed of the cold storage apparatus is adjusted in accordance with the temperature of the battery device, thereby controlling the temperature of the fluid, and achieving an accurate control of the temperature of the battery device.

The rotating speed of the first rotating speed range is within 15 r/min-60 r/min, the rotating speed is a lower rotating speed, namely the temperature difference is greater than or equal to the maximum value of the first predetermined range and still within the second predetermined range, the requirement of temperature control can be met by controlling the cold storage equipment to be a smaller rotating speed, the first rotating speed range is not limited to the range, and a person skilled in the art can select a proper first rotating speed range according to actual conditions.

The rotating speed of the second rotating speed range is within 60 r/min-300 r/min, the rotating speed is higher, namely the temperature difference is larger than the maximum value of the second preset range, the cold storage equipment is controlled to be higher rotating speed to meet the requirement of temperature control, of course, the second rotating speed range is not limited to the range, and a person skilled in the art can select a proper second rotating speed range according to actual conditions.

In one embodiment of the present application, as shown in fig. 6, in the case where the temperature difference is less than or equal to the minimum value of the first predetermined range, i.e., △ T ≦ b1, controlling the hot side outlet to communicate with the hot side bank so that the battery device enters a third control mode includes controlling the rotational speed of the cold storage device in a third rotational speed range so that the battery device enters a third control sub-mode of the third control mode in the case where the temperature difference is within the second predetermined range and less than or equal to the minimum value of the first predetermined range, i.e., a ≦ △ T ≦ b1, wherein the first predetermined range is included in the second predetermined range, the minimum value of the first predetermined range is greater than the minimum value of the second predetermined range, the maximum value of the first predetermined range is less than the maximum value of the second predetermined range, controlling the rotational speed of the cold storage device in a fourth rotational speed range so that the rotational speed of the cold storage device can be adjusted according to the third control sub-mode, and thus the rotational speed of the battery device can be adjusted accurately controlled according to the third control sub-mode.

The rotating speed of the third rotating speed range is within 15 r/min-60 r/min, the rotating speed is a lower rotating speed, namely the temperature difference is smaller than or equal to the minimum value of the first predetermined range and still within the second predetermined range, the requirement of temperature control can be met by controlling the cold storage equipment to be a smaller rotating speed, the third rotating speed range is not limited to the range, and a person skilled in the art can select a suitable third rotating speed range according to actual conditions.

The rotation speed of the fourth rotation speed range is within 60 r/min-300 r/min, the rotation speed is a higher rotation speed, and when the temperature difference is smaller than the minimum value of the second predetermined range, namely the temperature difference is outside the second predetermined range, the rotation speed for controlling the cold storage device to be a larger rotation speed can meet the temperature control requirement, of course, the second rotation speed range is not limited to this range, and a person skilled in the art can select a suitable second rotation speed range according to actual conditions.

In one embodiment of the present application, as shown in fig. 3, where the dashed line indicates that the cold end is not connected, and where the temperature difference is greater than the maximum value of the first predetermined range, at least the cold end outlet is controlled to be connected to the cold liquid tube bank, so that the battery device enters the second control mode, the control method further includes: detecting a second temperature when the temperature difference is greater than a maximum value of a first predetermined range, the second temperature being a temperature of the heat exchange fluid at the cold end outlet; and under the condition that the second temperature is lower than the first temperature, at least controlling a cold end outlet to be communicated with a cold liquid pipe group so that the battery device enters a second control mode. The second control mode specifically operates in the cooling mode as shown in fig. 3. The second control valve 602 in the first three-way valve 600 is open and the first control valve 601 is closed; the third control valve 701 in the second three-way valve 700 is closed, the fourth control valve 702 is opened and held, and the initial mode is unchanged. In this mode, the battery pack's cold liquid tube bank 101 is switched into the magnetic refrigeration system. Cold fluid generated by the magnetic refrigeration device flows out from a cold end outlet 501, passes through the second control valve 602, enters the cold liquid tube group 101 of the battery assembly, returns to a cold end inlet 502 of the magnetic refrigeration device, passes through the magnetized cold storage device 202 again, is further increased in temperature, flows through a hot end outlet 503 of the magnetic refrigeration device, flows through the fourth control valve 702, enters the second heat exchanger 800 (namely, a hot end heat exchanger) through a pipeline, returns to a hot end inlet 504 of the magnetic refrigeration device, and flows out from the cold end outlet 501 after passing through the demagnetized cold storage device 202, so that circulation in the second control mode is completed. The refrigeration control needs to be carried out under the condition that the temperature difference is detected to be larger than or equal to the maximum value of the first preset range, at the moment, the temperature of the heat exchange fluid of the cold end outlet needs to be detected, under the condition that the temperature of the heat exchange fluid of the cold end outlet is smaller than the first temperature, namely, under the condition that refrigeration needs to be realized, the cold end outlet is controlled to be communicated with the cold liquid pipe group, namely, the second control valve is controlled to be switched on, so that the heat exchange fluid flows into the cold liquid pipe group, and the refrigeration control is further realized.

In an embodiment of the present application, as shown in fig. 4, where the dashed line indicates that the hot side outlet is not connected, and the temperature difference is smaller than or equal to the minimum value of the first predetermined range, at least the hot side outlet is controlled to be connected to the hot side pipe set, so that the battery device enters a third control mode, the control method further includes: detecting a third temperature when the temperature difference is less than or equal to the minimum value of the first predetermined range, wherein the third temperature is the temperature of the heat exchange fluid at the hot end outlet; and under the condition that the third temperature is higher than the first temperature, at least controlling the hot end outlet to be communicated with the hot water pipe group, so that the battery device enters a third control mode, wherein the third control mode specifically adopts a working principle of a heating mode as shown in fig. 4. The first three-way valve 600 maintains the initial mode while the third control valve 701 in the second three-way valve 700 is opened and the fourth control valve 702 is closed. In this mode, the hot stack 102 of the battery compartment is connected to the magnetic refrigeration system. The hot fluid generated by the magnetic refrigeration device flows out of the hot end outlet 503, passes through the valve third control valve 701, enters the hot water pipe group 102 of the battery bin, returns to the hot end inlet 504 of the magnetic refrigeration device, passes through the demagnetized cold accumulator 202 again, is further reduced in temperature, flows through the valve first control valve 601 from the cold end outlet 501 of the magnetic refrigeration device, enters the first heat exchanger 400, returns to the cold end inlet 502 of the magnetic refrigeration device, and flows out of the hot end outlet 503 after passing through the magnetized cold accumulator 202, so that the circulation under the third control mode is completed.

And under the condition that the temperature difference is smaller than or equal to the minimum value of the first preset range, heating control needs to be carried out, at the moment, the temperature of the heat exchange fluid at the hot end outlet needs to be detected, and under the condition that the temperature of the heat exchange fluid at the hot end outlet is larger than the first temperature, the hot end outlet is controlled to be communicated with the hot liquid pipe group, namely the fourth control valve is controlled to be communicated, so that the heat exchange fluid flows into the hot liquid pipe group, and further heating is carried out.

In one embodiment of the present application, the driving assembly includes a motor, a transmission structure and a motor controller, wherein one end of the transmission structure is electrically connected to the motor, the other end of the transmission structure is connected to the rotating shaft, and when the temperature difference is within a second predetermined range and is greater than or equal to a maximum value of the first predetermined range, the driving assembly controls the rotating speed of the cold storage device within a first rotating speed range, including: controlling the rotation speed of the motor within the first rotation speed range; controlling the rotational speed of the cold storage apparatus within a second rotational speed range in the case where the temperature difference is greater than the maximum value of the second predetermined range includes: the rotating speed of the motor is controlled within the second rotating speed range, namely the rotating speed of the motor is controlled within the second rotating speed range, so that the rotating speed of the cold storage equipment is controlled within the second rotating speed range, and the temperature of the battery pack is accurately controlled

In an embodiment of the application, the battery device further includes a pump assembly, the pump assembly is located on a pipeline between the hot end outlet and the hot end inlet, the pump assembly includes a pump body, and when the temperature difference is within the second predetermined range and is less than or equal to a minimum value of the first predetermined range, the pump assembly controls the rotational speed of the cold storage device within a third rotational speed range, so that the battery device enters a third control sub-mode of the third control mode, the pump assembly further includes: the rotating speed of the pump body is controlled within a fifth rotating speed range, so that the flow speed of the heat exchange fluid is controlled, and the temperature of the battery pack is controlled more accurately and rapidly.

The rotating speed of the fifth rotating speed range is within 30 r/min-60 r/min, the rotating speed is a lower rotating speed, namely the temperature difference is within the second predetermined range and is less than or equal to the minimum value of the first predetermined range, the temperature control requirement can be met by controlling the cold storage equipment to be a smaller rotating speed, the fifth rotating speed range is not limited to the range, and a person skilled in the art can select a suitable fifth rotating speed range according to actual conditions.

When the temperature difference is smaller than the minimum value of the second predetermined range, the method controls the rotational speed of the cold storage device within a fourth rotational speed range so that the battery device enters a fourth control sub-mode of the third control mode, and further includes: and controlling the rotation speed of the pump body within a sixth rotation speed range, wherein the maximum value of the fifth rotation speed range is smaller than the minimum value of the sixth rotation speed range.

The rotating speed of the sixth rotating speed range is within 60 r/min-300 r/min, that is, the temperature difference is smaller than the minimum value of the second predetermined range, the cold storage device is controlled to have a larger rotating speed, which can meet the requirement of temperature control, of course, the sixth rotating speed range is not limited to this range, and those skilled in the art can select an appropriate sixth rotating speed range according to the actual situation.

In an embodiment of the application, before the battery device enters the second control mode or the third control mode, as shown in fig. 2, a dashed line indicates that the cold end outlet is not connected, the cold end outlet is controlled not to be connected to the cold liquid pipe set, and the hot end outlet is controlled not to be connected to the hot liquid pipe set, so that the battery device enters the first control mode. The specific working principle of the first control mode is as follows: as shown in fig. 2, i.e., the initial mode. Along with the starting of the battery and the starting of the magnetic refrigerating device, the temperature of the battery is gradually increased, and the magnetic refrigerating machine gradually and stably works. The second control valve 602 in the first three-way valve is closed and the first control valve 601 is opened; the third control valve 701 of the second three-way valve is closed and the fourth control valve 702 is open. In this mode, the battery assembly is not connected to the magnetic refrigeration system. Cold fluid generated by the magnetic refrigeration device flows out from a cold end outlet 501, passes through the first valve control valve 601, enters the first heat exchanger 400 (namely, a cold end heat exchanger), returns to a cold end inlet 502 of the magnetic refrigeration device, passes through the magnetized cold storage device 202 again, is further increased in temperature, flows through a hot end outlet 503 of the magnetic refrigeration device, flows through the fourth valve control valve 702, enters the second heat exchanger 800 (namely, a hot end heat exchanger) through a pipeline, returns to a hot end inlet 504 of the magnetic refrigeration device, and flows out from the cold end outlet 501 after passing through the demagnetized cold storage device 202, so that circulation in the first control mode is completed. Before refrigeration control or heating control is carried out, the battery device needs to be controlled in a preparation stage, namely a cold liquid tube group and a hot liquid tube group are not communicated, so that the problem that short-term temperature fluctuation influences the temperature uniformity of the battery assembly due to direct communication of magnetic refrigeration equipment and the battery assembly is further avoided, the rapidity of controlling the temperature of the battery assembly is further ensured, and the battery device cannot be damaged.

In an embodiment of the present application, the entering of the battery device into the first control mode further includes, as shown in fig. 6, controlling the rotational speed of the cold storage device within a seventh rotational speed range to enter the first sub-mode of the first control mode when the temperature difference is within a second predetermined range, that is, a is not more than △ T not more than c, and controlling the rotational speed of the cold storage device within a seventh rotational speed range to meet the temperature control requirement, where the rotational speed of the seventh rotational speed range is within 30r/min to 60r/min, that is, the temperature difference is within the second predetermined range, that is, the seventh rotational speed range is not limited to this range, and those skilled in the art can select an appropriate seventh rotational speed range according to actual conditions.

And under the condition that the temperature difference is not in a second preset range, controlling the rotating speed of the cold accumulation equipment to be in an eighth rotating speed range, and controlling to enter a second sub-mode of the first control mode, wherein the maximum value of the seventh rotating speed range is smaller than the minimum value of the eighth rotating speed range. The rotating speed of the eighth rotating speed range is within 60 r/min-300 r/min, namely the temperature difference is outside the second preset range, the cold storage equipment is controlled to be at a larger rotating speed, the requirement of temperature control can be met, the eighth rotating speed range is not limited to the range, and a person skilled in the art can select a proper eighth rotating speed range according to actual conditions, so that the rapidity of controlling the temperature of the battery pack is further ensured, and the battery device is not damaged.

In an embodiment of the application, after entering the first control sub-mode, the second control sub-mode, the third control sub-mode, or the fourth control sub-mode, and operating for a predetermined time, the method further includes: and detecting a first temperature, and controlling the rotating speed of the cold storage equipment to be within a seventh rotating speed range under the condition that the temperature difference is within the first preset range, so that the battery device enters a first sub-mode of a first control mode, namely, under the condition that the temperature difference is detected to be within the first preset range, refrigeration and heating are not needed, and the battery device is controlled to operate under the first sub-mode of the first control mode, namely, under the stable operation mode of the first control mode, so that the temperature control can be realized.

In another exemplary embodiment of the present application, there is provided a control apparatus including:

the battery pack temperature acquisition device comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring a first temperature, and the first temperature is the temperature of the battery pack;

a comparison unit for making a difference between the first temperature and a predetermined temperature to obtain a temperature difference;

and the first control unit is used for controlling at least the cold end outlet to be communicated with the cold liquid pipe group under the condition that the temperature difference is larger than the maximum value of the first preset range, so that the battery device enters a second control mode.

In this application, through the comparing element, the temperature of comparison battery pack and predetermined temperature obtain the temperature difference, and then according to the size of temperature difference, carry out corresponding control, specifically, under the circumstances that above-mentioned temperature difference is greater than the maximum value of first predetermined range, battery pack's temperature is higher promptly, need carry out refrigeration control promptly, and then control cold junction export and cold liquid nest of tubes intercommunication, and then realize the control to the heat transfer fluidic temperature in the cold liquid nest of tubes, and then realize the refrigeration control to battery pack, the accurate control to battery pack temperature has been realized.

In one embodiment of the present application, the battery assembly further includes a hot stack disposed on a side of the battery body away from the cold stack, the cold storage device further includes a hot fluid distributor disposed on a side of the cold storage device away from the cold fluid distributor, the hot fluid distributor being configured to receive and distribute a heat exchange fluid, the hot fluid distributor having a hot outlet and a hot inlet, the hot outlet being in fluid communication with the hot stack, the apparatus includes a second control unit configured to control at least the hot outlet to communicate with the hot stack when the temperature difference is less than or equal to a minimum value of a first predetermined range, as shown in fig. 6, the first predetermined range is represented by (b1, b2), the temperature difference is represented by △ T, so that the battery apparatus enters a third control mode.

In one embodiment of the present application, the first control unit is further configured to control the rotational speed of the cold storage device within a first rotational speed range so that the battery device enters a first control sub-mode of the second control mode when the temperature difference is within a second predetermined range and equal to or greater than a maximum value of the first predetermined range, and to control the rotational speed of the cold storage device within a second rotational speed range so that the battery device enters a second control sub-mode of the second control mode when the temperature difference is greater than a maximum value of the second predetermined range, wherein the maximum value of the first rotational speed range is smaller than a minimum value of the second rotational speed range. According to the temperature of the battery device, the rotating speed of the cold accumulation equipment can be adjusted, so that the temperature of the heat exchange fluid is controlled, and the accurate control of the temperature of the battery device can be realized.

In one embodiment of the present application, the second control unit is further configured to control the rotational speed of the cold storage device in a third rotational speed range as shown in fig. 6 to enable the battery device to enter a third control sub-mode of the third control mode when the temperature difference is within the second predetermined range and is less than or equal to a minimum value of the first predetermined range, that is, a is less than or equal to △ T is less than or equal to b1, wherein the first predetermined range is included in the second predetermined range, the minimum value of the first predetermined range is greater than the minimum value of the second predetermined range, the maximum value of the first predetermined range is less than the maximum value of the second predetermined range, and the rotational speed of the cold storage device is controlled in a fourth rotational speed range as shown in fig. 6 to enable the battery device to enter the fourth control mode of the third control sub-mode, and the maximum value of the third rotational speed range is less than the minimum value of the fourth rotational speed range, so that the rotational speed of the cold storage device can be adjusted according to the temperature of the battery device, thereby enabling the temperature of the heat storage device to be accurately controlled.

In an embodiment of the present application, the first control unit is further configured to, in a case where the temperature difference is greater than a maximum value of a first predetermined range, control at least the cold-end outlet to communicate with the cold-liquid tube group, so that the battery device enters a second control mode, and in a case where the temperature difference is greater than the maximum value of the first predetermined range, detect a second temperature, where the second temperature is a temperature of the heat exchange fluid at the cold-end outlet; and under the condition that the second temperature is lower than the first temperature, at least controlling a cold end outlet to be communicated with a cold liquid pipe group so that the battery device enters a second control mode. The second control mode specifically operates in the cooling mode as shown in fig. 3. The second control valve 602 in the first three-way valve 600 is open and the first control valve 601 is closed; the third control valve 701 in the second three-way valve 700 is closed, the fourth control valve 702 is opened and held, and the initial mode is unchanged. In this mode, the battery pack's cold liquid tube bank 101 is switched into the magnetic refrigeration system. Cold fluid generated by the magnetic refrigeration device flows out from a cold end outlet 501, passes through the second control valve 602, enters the cold liquid tube group 101 of the battery assembly, returns to a cold end inlet 502 of the magnetic refrigeration device, passes through the magnetized cold storage device 202 again, is further increased in temperature, flows through a hot end outlet 503 of the magnetic refrigeration device, flows through the fourth control valve 702, enters the second heat exchanger 800 (namely, a hot end heat exchanger) through a pipeline, returns to a hot end inlet 504 of the magnetic refrigeration device, and flows out from the cold end outlet 501 after passing through the demagnetized cold storage device 202, so that circulation in the second control mode is completed. The refrigeration control needs to be carried out under the condition that the temperature difference is detected to be larger than or equal to the maximum value of the first preset range, at the moment, the temperature of the heat exchange fluid of the cold end outlet needs to be detected, under the condition that the temperature of the heat exchange fluid of the cold end outlet is smaller than the first temperature, namely, under the condition that refrigeration needs to be realized, the cold end outlet is controlled to be communicated with the cold liquid pipe group, namely, the second control valve is controlled to be switched on, so that the heat exchange fluid flows into the cold liquid pipe group, and the refrigeration control is further realized.

In an embodiment of the present application, the second control unit is further configured to, in a case where the temperature difference is smaller than or equal to a minimum value of the first predetermined range, control at least a hot end outlet to communicate with a hot end pipe group, so that the battery device enters a third control mode, and in a case where the temperature difference is smaller than or equal to a minimum value of the first predetermined range, detect a third temperature, where the third temperature is a temperature of the heat exchange fluid at the hot end outlet; and under the condition that the third temperature is higher than the first temperature, at least controlling a hot end outlet to be communicated with a hot water pipe group, so that the battery device enters a third control mode. The third control mode specifically operates in a heating mode as shown in fig. 4. The first three-way valve 600 maintains the initial mode while the third control valve 701 in the second three-way valve 700 is opened and the fourth control valve 702 is closed. In this mode, the hot stack 102 of the battery compartment is connected to the magnetic refrigeration system. The hot fluid generated by the magnetic refrigeration device flows out from the hot end outlet 503, passes through the valve third control valve 701, enters the hot water tube group 102 of the battery bin, returns to the hot end inlet 504 of the magnetic refrigeration device, passes through the demagnetized cold accumulator 202 again, is further reduced in temperature, flows through the valve first control valve 601 from the cold end outlet 501 of the magnetic refrigeration device, enters the first heat exchanger 400 (i.e., the cold end heat exchanger) and returns to the cold end inlet 502 of the magnetic refrigeration device, and flows out from the hot end outlet 503 after passing through the magnetized cold accumulator 202, so that the circulation under the third control mode is completed.

And under the condition that the temperature difference is smaller than or equal to the minimum value of the first preset range, heating control needs to be carried out, at the moment, the temperature of the heat exchange fluid at the hot end outlet needs to be detected, and under the condition that the temperature of the heat exchange fluid at the hot end outlet is larger than the first temperature, namely, under the condition that heating can be realized, the hot end outlet is controlled to be communicated with the hot liquid pipe group, namely, the fourth control valve is controlled to be communicated, so that the heat exchange fluid flows into the hot liquid pipe group, and further, the heating control is realized.

In one embodiment of the present application, the driving assembly includes a motor, a transmission structure and a motor controller, wherein one end of the transmission structure is electrically connected to the motor, the other end of the transmission structure is connected to the rotating shaft, and when the temperature difference is within a second predetermined range and is greater than or equal to a maximum value of the first predetermined range, the driving assembly controls the rotating speed of the cold storage device within a first rotating speed range, including: controlling the rotation speed of the motor within the first rotation speed range; controlling the rotational speed of the cold storage apparatus within a second rotational speed range in the case where the temperature difference is greater than the maximum value of the second predetermined range includes: and controlling the rotating speed of the motor to be in the second rotating speed range. Namely, the rotating speed of the motor is controlled in the second rotating speed range, so that the rotating speed of the cold storage equipment is in the second rotating speed range, and the temperature of the battery component is accurately controlled

The rotating speed of the fifth rotating speed range is within 30 r/min-60 r/min, and is a lower rotating speed, that is, although the temperature difference is within the second predetermined range and is less than or equal to the minimum value of the first predetermined range, the temperature control requirement can be met by controlling the cold storage device to be a smaller rotating speed, of course, the fifth rotating speed range is not limited to this range, and a person skilled in the art can select a suitable fifth rotating speed range according to actual conditions.

The rotating speed of the sixth rotating speed range is within 60 r/min-300 r/min, namely the temperature difference is less than the minimum value of the second predetermined range, the cold storage device is controlled to be at a larger rotating speed, and the requirement of temperature control can be met.

In an embodiment of the present application, the third control unit is further configured to, as shown in fig. 6, control the rotational speed of the cold storage device within a seventh rotational speed range in a case where the temperature difference is within a second predetermined range, that is, a is not greater than △ T not greater than c, so that the battery device enters the first sub-mode of the first control mode, control the cold storage device to be a smaller rotational speed in the seventh rotational speed range in which the rotational speed is within 30r/min to 60r/min, that is, the temperature difference is within the second predetermined range, so as to meet the requirement of temperature control, although the seventh rotational speed range is not limited to this range, and a person skilled in the art can select an appropriate seventh rotational speed range according to actual circumstances;

In an embodiment of the application, after entering the first control sub-mode, the second control sub-mode, the third control sub-mode, or the fourth control sub-mode, and after operating for a period of time, the method further includes: and detecting a first temperature, and controlling the battery device to enter a first sub-mode of a first control mode under the condition that the temperature difference is within the first preset range, namely, under the condition that the temperature difference is within the first preset range, the battery device is controlled to operate in the first sub-mode of the first control mode, namely, in a smooth operation mode of the first control mode, so that the temperature control can be realized without cooling or heating.

Another exemplary embodiment of the present application includes a battery system including a battery device and a control device that may enable precise control of a temperature of a battery assembly.

The control device comprises a processor and a memory, the acquisition unit, the comparison unit, the first control unit and the like are stored in the memory as program units, and the processor executes the program units stored in the memory to realize corresponding functions.

The processor comprises a kernel, and the kernel calls the corresponding program unit from the memory. One or more than one kernel can be set, and the precise control of the temperature of the battery component is realized by adjusting the kernel parameters.

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), and the memory includes at least one memory chip.

An embodiment of the present invention provides a storage medium on which a program is stored, the program implementing the above-described control method when executed by a processor.

The embodiment of the invention provides a processor, which is used for running a program, wherein the control method is executed when the program runs.

The embodiment of the invention provides equipment, which comprises a processor, a memory and a program which is stored on the memory and can run on the processor, wherein when the processor executes the program, at least the following steps are realized:

The device herein may be a server, a PC, a PAD, a mobile phone, etc.

The present application further provides a computer program product adapted to perform a program of initializing at least the following method steps when executed on a data processing device:

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application 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 application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. 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 data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data 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 data 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 data 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). The 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, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.

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 identical elements in the process, method, article, or apparatus that comprises the element.

From the above description, it can be seen that the above-described embodiments of the present application achieve the following technical effects:

1) the utility model provides a battery device, drive assembly can be so that produce relative motion between permanent magnet structure and the regenerator, and then can add magnetism or demagnetization to the regenerator for solid magnetic medium in the regenerator takes place the magnetocaloric effect and dispels the heat or absorb the heat, and the cold volume that can produce through the heat transfer fluid in the cold junction fluid distributor is taken to battery body one side and is included the cold liquid nest of tubes, realizes refrigerating. In the device, but above-mentioned cold junction export break-make ground with above-mentioned cold liquid nest of tubes intercommunication, can be with the break-make of cold junction export and above-mentioned cold liquid nest of tubes according to actual conditions control to avoided magnetic refrigeration equipment direct and battery pack intercommunication, caused short-term temperature fluctuation and influenced battery pack's temperature homogeneity. In addition, the device adopts the permanent magnet structure to provide a magnetic field, and compared with a superconducting magnet and an electromagnet, the permanent magnet structure is simple, the manufacturing cost is low, and cooling is not needed. In addition, the magnetic working medium in the regenerator is a solid magnetic working medium, and compared with a liquid magnetic working medium, the solid magnetic working medium is mature in industry, and the density of the magnetic working medium is high under the same volume. The invention is also suitable for a liquid magnetic working medium (one type of magnetic fluid), has the advantages of convenient heat exchange and no secondary refrigerant (the heat exchange fluid in the invention) compared with a solid magnetic working medium, and uses a magnetic refrigeration system as a heat management system of the automobile power battery compared with the traditional vapor compression type refrigerant system, so that the system has fewer parts, and further the whole system has small occupied space and convenient maintenance.

2) The control method obtains the temperature difference by calculating the temperature of the battery pack and the preset temperature, and then performs corresponding control according to the temperature difference, specifically, under the condition that the temperature difference is larger than the maximum value of the first preset range, namely, the temperature of the battery pack is higher, refrigeration control is required, and then the cold end outlet is controlled to be communicated with the cold liquid pipe group, so that the temperature of the heat exchange fluid in the cold liquid pipe group is controlled, and refrigeration of the battery pack is realized.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery device, comprising:

the battery assembly comprises a battery body and a cold liquid pipe group positioned on one side of the battery body;

the cold accumulation device comprises a cold accumulation assembly and a cold end fluid distributor, wherein the cold accumulation assembly comprises a cold accumulator and a permanent magnet structure, the cold accumulator comprises a solid magnetic working medium, the permanent magnet structure is positioned on at least one side of the cold accumulator in a first direction, the cold end fluid distributor is positioned on one side of the cold accumulation device in a second direction, the cold end fluid distributor is used for containing and distributing heat exchange fluid, the cold end fluid distributor is provided with a cold end outlet and a cold end inlet, the cold end outlet can be communicated with the cold liquid pipe group in an on-off mode, and the first direction is the height direction of the cold accumulation device;

and the driving assembly is used for driving the permanent magnet structure and/or the regenerator to move so as to enable the permanent magnet structure and the regenerator to move relatively.

2. The battery device according to claim 1,

the battery assembly also comprises a hot liquid pipe group, and the hot liquid pipe group is positioned on one side of the battery body far away from the cold liquid pipe group;

the cold accumulation device further comprises a hot end fluid distributor, the hot end fluid distributor is located on one side, far away from the cold end fluid distributor, of the cold accumulation device and used for containing and distributing heat exchange fluid, the hot end fluid distributor is provided with a hot end outlet and a hot end inlet, and the hot end outlet can be communicated with the hot end pipe group in an on-off mode.

3. The battery device according to claim 1, further comprising:

one end of the first heat exchanger is communicated with the cold end outlet in a switching mode, and the other end of the first heat exchanger is communicated with the cold end inlet;

one end of the second heat exchanger can be communicated with the hot end outlet in an on-off mode, and the other end of the second heat exchanger is communicated with the hot end inlet.

4. The battery device of claim 3, wherein the line between the first heat exchanger and the cold side outlet is a first line, the line between the cold bank of tubes and the cold side outlet is a second line, the line between the second heat exchanger and the hot side outlet is a third line, and the line between the hot bank of tubes and the hot side outlet is a fourth line, the battery device further comprising:

the first three-way valve is partially positioned on the first pipeline and partially positioned on the second pipeline and used for controlling the on-off of the first pipeline and the on-off of the second pipeline;

and the second three-way valve is partially positioned on the third pipeline and partially positioned on the fourth pipeline and is used for controlling the on-off of the third pipeline and the on-off of the fourth pipeline.

5. The battery device according to claim 1, further comprising:

a first temperature detector in communication with the battery assembly for detecting a temperature of the battery assembly;

a second temperature detector in communication with the cold end outlet for detecting a temperature of the heat exchange fluid at the cold end outlet;

and the third temperature detector is communicated with the hot end outlet and is used for detecting the temperature of the heat exchange fluid at the hot end outlet.

6. The battery device according to claim 2, further comprising:

and the pump assembly is positioned on a pipeline between the hot end outlet and the hot end inlet, and comprises a pump body and a rotating speed controller electrically connected with the pump body, wherein the rotating speed controller is used for controlling the rotating speed of the pump body.

7. The battery device according to any one of claims 1 to 6, wherein the cold storage assembly comprises a plurality of the permanent magnet structures and a plurality of the cold storage devices, at least one of the permanent magnet structures is disposed on both sides of each of the cold storage devices, and the cold storage assembly further comprises a rotating shaft connected with at least one of the permanent magnet structures.

8. The battery device according to claim 7, wherein there are two groups of cold accumulators, each comprising at least one of the cold accumulators, and two of the permanent magnet structures are an inner magnet structure and an outer magnet structure, wherein the outer magnet structure is located circumferentially outward of the inner magnet structure, the cold accumulators are located between the outer magnet structure and the inner magnet structure, and the cold accumulators are spaced apart.

9. The battery device of claim 7, wherein the drive assembly comprises:

a motor;

one end of the transmission structure is electrically connected with the motor, and the other end of the transmission structure is connected with the rotating shaft;

and the motor controller is electrically connected with the motor and used for controlling the rotating speed of the motor.

10. The battery device according to claim 4,

the first heat exchanger with pipeline between the cold junction export is first pipeline, cold liquid nest of tubes with pipeline between the cold junction export is the second pipeline, first three-way valve includes:

a first control valve located only on the first line;

a second control valve located only on the second line;

the pipeline between the second heat exchanger and the hot end outlet is a third pipeline, the pipeline between the hot water pipe group and the hot end outlet is a fourth pipeline, and the second three-way valve comprises:

a third control valve located only on the third line;

a fourth control valve located only on the fourth line.

11. A control method of the battery device according to any one of claims 1 to 10, characterized by comprising:

collecting a first temperature, wherein the first temperature is the temperature of the battery assembly;

the first temperature is differenced with a preset temperature to obtain a temperature difference;

and controlling at least the cold end outlet to be communicated with the cold liquid pipe group under the condition that the temperature difference is larger than or equal to the maximum value of the first preset range, so that the battery device enters a second control mode.

12. The method of claim 11 wherein the battery assembly further comprises a hot bank of tubes on a side of the battery body remote from the cold bank of tubes, the cold thermal storage device further comprising a hot side fluid distributor on a side of the cold reservoir remote from the cold side fluid distributor for holding and distributing a heat exchange fluid, the hot side fluid distributor having a hot side outlet and a hot side inlet, the hot side outlet in fluid communication with the hot bank of tubes, the method comprising:

and under the condition that the temperature difference is smaller than or equal to the minimum value of the first preset range, at least controlling a hot end outlet to be communicated with a hot water pipe group, so that the battery device enters a third control mode.

13. The control method of claim 11, wherein in the event that the temperature difference is greater than a maximum of a first predetermined range, controlling at least a cold end outlet in communication with a cold bank of tubes such that the battery device enters a second control mode comprises:

under the condition that the temperature difference is within a second preset range and is greater than or equal to the maximum value of the first preset range, controlling the rotating speed of the cold accumulation device within a first rotating speed range so that the battery device enters a first control sub-mode of the second control mode;

and under the condition that the temperature difference is larger than the maximum value of the second preset range, controlling the rotating speed of the cold accumulation device to be in a second rotating speed range so that the battery device enters a second control sub-mode of the second control mode, wherein the maximum value of the first rotating speed range is smaller than the minimum value of the second rotating speed range.

14. The control method of claim 13, wherein controlling a hot end outlet to communicate with a hot stack of tubes such that the battery device enters a third control mode in the case where the temperature difference is less than or equal to a minimum value of the first predetermined range comprises:

in a case where the temperature difference is within a second predetermined range and is less than or equal to a minimum value of the first predetermined range, controlling the rotational speed of the cold storage device within a third rotational speed range such that the battery device enters a third control sub-mode of the third control mode, wherein the first predetermined range is included in the second predetermined range, the minimum value of the first predetermined range is greater than the minimum value of the second predetermined range, and the maximum value of the first predetermined range is less than the maximum value of the second predetermined range;

and under the condition that the temperature difference is smaller than the minimum value of the second preset range, controlling the rotating speed of the cold accumulation device to be within a fourth rotating speed range, so that the battery device enters a fourth control sub-mode of the third control mode, and the maximum value of the third rotating speed range is smaller than the minimum value of the fourth rotating speed range.

15. The control method of claim 13, wherein in the event that the temperature difference is greater than a maximum of a first predetermined range, controlling at least a cold end outlet in communication with a cold bank of tubes such that the battery device enters a second control mode, the control method further comprising:

detecting a second temperature when the temperature difference is greater than a maximum value of a first predetermined range, the second temperature being a temperature of the heat exchange fluid at the cold end outlet;

and under the condition that the second temperature is lower than the first temperature, at least controlling a cold end outlet to be communicated with a cold liquid pipe group so that the battery device enters a second control mode.

16. The control method of claim 14, wherein in the event that the temperature difference is less than or equal to a minimum value of the first predetermined range, controlling at least a hot side outlet to communicate with a hot bank so that the battery device enters a third control mode, the control method further comprising:

detecting a third temperature when the temperature difference is less than or equal to the minimum value of the first preset range, wherein the third temperature is the temperature of the heat exchange fluid at the hot end outlet;

and under the condition that the third temperature is higher than the first temperature, at least controlling a hot end outlet to be communicated with a hot pipe group, so that the battery device enters a third control mode.

17. The control method of claim 13, wherein the driving assembly comprises a motor, a transmission structure and a motor controller, wherein the transmission structure has one end electrically connected to the motor and the other end connected to the rotating shaft,

controlling the rotational speed of the cold storage apparatus in a first rotational speed range in a case where the temperature difference is within a second predetermined range and equal to or greater than a maximum value of the first predetermined range, including: controlling the rotation speed of the motor within the first rotation speed range;

controlling the rotational speed of the cold storage apparatus within a second rotational speed range in the case where the temperature difference is greater than the maximum value of the second predetermined range, including: and controlling the rotating speed of the motor to be in the second rotating speed range.

18. The control method of claim 14, wherein the battery device further comprises a pump assembly located on the line between the hot side outlet and the hot side inlet, the pump assembly comprising a pump body,

in a case where the temperature difference is within the second predetermined range and is less than or equal to a minimum value of the first predetermined range, controlling the rotational speed of the cold storage device within a third rotational speed range such that the battery device enters a third control sub-mode of the third control mode, further comprising:

controlling the rotating speed of the pump body within a fifth rotating speed range;

in a case where the temperature difference is smaller than a minimum value of the second predetermined range, controlling the rotational speed of the cold storage apparatus within a fourth rotational speed range so that the battery device enters a fourth control sub-mode of the third control mode, further comprising:

and controlling the rotating speed of the pump body within a sixth rotating speed range, wherein the maximum value of the fifth rotating speed range is smaller than the minimum value of the sixth rotating speed range.

19. The control method according to claim 12, characterized by comprising, before the battery device enters the second control mode or the third control mode:

and controlling the cold end outlet not to be communicated with the cold liquid pipe group and controlling the hot end outlet not to be communicated with the hot liquid pipe group, so that the battery device enters a first control mode.

20. The control method of claim 19, wherein causing the battery device to enter the first control mode further comprises:

under the condition that the temperature difference is in a second preset range, controlling the rotating speed of the cold accumulation device to be in a seventh rotating speed range so that the battery device enters a first sub-mode of a first control mode;

and under the condition that the temperature difference is not in a second preset range, controlling the rotating speed of the cold accumulation device to be in an eighth rotating speed range, and controlling to enter a second sub-mode of the first control mode, wherein the maximum value of the seventh rotating speed range is smaller than the minimum value of the eighth rotating speed range.

21. The control method of claim 14, further comprising, after running for a predetermined time after entering the control sub-mode, the second control sub-mode, the third control sub-mode, or the fourth control sub-mode:

and detecting a first temperature, and controlling the rotating speed of the cold accumulation device to be in a seventh rotating speed range under the condition that the temperature difference is in the first preset range, so that the battery device enters a first sub-mode of a first control mode.

22. A control device, comprising:

the acquisition unit is used for acquiring a first temperature, and the first temperature is the temperature of the battery pack;

the calculating unit is used for making a difference between the first temperature and a preset temperature to obtain a temperature difference;

23. A storage medium characterized by comprising a stored program, wherein the program executes the control method of any one of claims 11 to 21.

24. A processor, characterized in that the processor is configured to run a program, wherein the program is configured to execute the control method according to any one of claims 11 to 21 when running.

25. A battery system, comprising:

the battery device of any one of claims 1 to 10;

control means for executing the control method of any one of claims 11 to 21.