CN114614125A - Battery, battery temperature regulation method and battery management system - Google Patents

Abstract

The application relates to the technical field of automobile batteries, in particular to a battery, a battery temperature adjusting method and a battery management system. A plurality of annular pipelines are arranged in the inner cavity of the battery, each annular pipeline is communicated with a liquid tank, a communication passage of each annular pipeline and the liquid tank is provided with a switch valve, and each switch valve is used for being connected with a battery management system BMS; the plurality of annular pipelines divide the inner cavity of the battery into a plurality of temperature regulation areas, the battery is further provided with a temperature measurement component for acquiring temperature data of each temperature regulation area, and the temperature measurement component is used for sending the temperature data of each temperature regulation area to the BMS, so that the BMS determines the abnormal state of the battery temperature according to the temperature data of each temperature regulation area, and controls the open/close state and the sequence of each switch valve according to the abnormal state of the battery temperature, so that the antifreeze in the liquid tank flows through the annular pipeline with the closed switch valve.

Description

Battery, battery temperature regulation method and battery management system

【Technical field】

The present application relates to the technical field of automobile batteries, and in particular, to a battery, a battery temperature adjustment method and a battery management system.

【Background technique】

With the development of new energy vehicles, the proportion of electric vehicles is increasing. As the core component of electric vehicles, the battery system directly affects the performance and safety of electric vehicles. The battery system needs to work at a suitable temperature. If the temperature is too low, it will reduce the capacity, make charging difficult and affect the battery life. If the battery temperature is too high, it will cause thermal safety accidents. Therefore, it is necessary to adjust the temperature when the battery temperature is abnormal.

In the prior art, when the battery management system (Battery Management System, BMS) adjusts the temperature of the battery, the battery is generally regarded as a whole, and the temperature is controlled uniformly, and the control effect on the temperature consistency is poor.

[Content of the invention]

In view of this, the embodiments of the present invention provide a battery, a battery temperature adjustment method, and a battery management system. By adjusting the battery by partition, the consistency of the battery temperature is well ensured when the battery temperature is adjusted preferentially. .

In a first aspect, an embodiment of the present invention provides a battery, characterized in that a plurality of annular pipes are arranged in the inner cavity of the battery, each of the annular pipes is communicated with a liquid tank, and each of the annular pipes On-off valves are provided on the communication passages with the liquid tank, and each on-off valve is used to connect with the battery management system BMS;

The plurality of annular pipes divide the inner cavity of the battery into a plurality of temperature adjustment areas, and the battery is further provided with a temperature measuring component for acquiring temperature data of each temperature adjustment area, and the temperature measuring component is used for measuring each temperature adjustment area. The temperature data of the battery is sent to the BMS, so that the BMS determines the abnormal state of battery temperature according to the temperature data of each temperature adjustment area, and controls the opening/closing state and sequence of each switch valve according to the abnormal state of battery temperature, so as to The antifreeze liquid in the liquid tank is circulated in the annular pipe with the on-off valve closed.

Optionally, the inner cavity of the battery is further provided with a connecting pipe, and the water outlet and the water inlet of the connecting pipe are communicated with the liquid tank;

The interface of each annular pipe communicates with the pipe body of the connecting pipe, so as to communicate with the liquid tank through the connecting pipe.

Optionally, the connecting pipe is a U-shaped pipe;

The U-shaped pipeline is provided with a plurality of interface pairs, each of the interface pairs is symmetrically distributed on both sides of the U-shaped body, and each interface pair is used to connect two interfaces of a ring-shaped pipeline.

Optionally, the plurality of annular pipes are zigzag pipes of different sizes, and each zigzag pipe is nested and arranged in order of size.

In a second aspect, an embodiment of the present invention provides a battery temperature adjustment method, the method applies a battery management system BMS, and the BMS is connected to the on-off valve and the temperature measuring component in the battery according to any one of claims 1 to 4. , the BMS executes the method, including:

Obtain battery temperature data collected by each temperature measuring component, wherein each temperature measuring component is respectively deployed in each temperature adjustment area of the battery cavity;

According to the battery temperature data, determine the abnormal temperature state of each temperature adjustment area of the battery;

According to the abnormal state of the battery temperature, the opening/closing state and sequence of the on-off valves of each annular pipe are determined.

Optionally, according to the battery temperature data, the abnormal temperature state of each temperature adjustment area of the battery is determined, and the method includes:

determining a maximum temperature value and a minimum temperature value from the battery temperature data;

If the maximum temperature value is greater than the high temperature threshold, according to the order of the temperature in each of the temperature adjustment areas from high to low, sequentially control the on-off valves of the annular pipes in the corresponding temperature adjustment areas to close;

If the minimum temperature value is less than the low temperature threshold, the on-off valves of the annular pipes in the corresponding temperature adjustment areas are sequentially controlled to be closed according to the order of temperature in each of the temperature adjustment areas from low to high.

Optionally, according to the temperature data of each temperature adjustment area, the abnormal state of the battery temperature is determined, and the method further includes:

determining a maximum temperature value and a minimum temperature value from the battery temperature data;

If the difference between the maximum temperature value and the minimum temperature value is greater than a set threshold value, compare the temperature relationship between the maximum temperature value and the minimum temperature value and the antifreeze in the liquid tank;

If the temperature of the antifreeze liquid is less than the minimum temperature value, according to the order of the temperature in each of the temperature adjustment areas from high to low, the on-off valves of the annular pipes in the corresponding temperature adjustment areas are sequentially controlled to close;

If the temperature of the antifreeze is greater than the maximum temperature value, according to the order of the temperature in each of the temperature adjustment areas from low to high, the on-off valves of the annular pipes in the corresponding temperature adjustment areas are sequentially controlled to close;

If the temperature of the antifreeze liquid is between the minimum temperature value and the maximum temperature value, the on-off valves of all the annular pipes are controlled to be closed at the same time.

Optionally, the determining the highest temperature value and the lowest temperature value from the battery temperature data, the method includes:

Determine the maximum temperature and the minimum temperature in each of the temperature adjustment regions from the battery temperature data collected by each temperature measuring component;

respectively comparing the respective maximum temperature and minimum temperature of each of the temperature adjustment regions;

Determining the maximum temperature with the highest temperature value as the maximum temperature value;

The minimum temperature with the lowest temperature value is determined as the minimum temperature value.

Optionally, after determining the open/close state and sequence of the on-off valves of each annular pipe according to the abnormal state of the battery temperature, the method includes:

When it is determined that the battery temperature is restored from the abnormal state to the normal state, the on-off valve of each closed annular pipe is opened.

In a third aspect, an embodiment of the present invention provides a battery management system BMS, including:

at least one processor; and

at least one memory communicatively coupled to the processor, wherein:

The memory stores program instructions executable by the processor, and the processor invokes the program instructions to perform the method according to any one of the second aspects.

Through the above solution, the zone adjustment is realized for each temperature adjustment area inside the battery. Under the condition of maintaining the consistency of the battery temperature, the area with abnormal temperature in the battery is preferentially adjusted, which reduces the energy consumption and ensures the safe use of the battery.

【Description of drawings】

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

1 is a schematic structural diagram of a battery according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a battery system according to an embodiment of the present invention;

3 is a flowchart of a method for adjusting battery temperature according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a battery management system BMS according to an embodiment of the present invention.

【Detailed ways】

In order to better understand the technical solutions of the present invention, the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

It should be understood that the described embodiments are only some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The battery management system (BMS) usually controls the temperature of the battery through the liquid cooling pipeline set in the battery, which can realize the functions of low temperature heating and high temperature cooling when the battery temperature is abnormal. However, in the process of heating and cooling the battery, the consistency of the battery temperature is also critical. If the battery temperature consistency is poor, it will not only reduce the performance and reliability of the battery, but even cause a thermal runaway accident.

Through thermal simulation of the battery mounted on the electric vehicle, it can be known that the temperature of the battery in the working state has a certain difference at each position. The temperature in the central area of the battery is relatively high, and the temperature of the battery decreases gradually from the center to the periphery. There is a large difference between the temperature in the central area and the temperature in the peripheral area. When the battery continues to work, the temperature difference will have a great impact on the function and life of the battery. Therefore, in the process of temperature adjustment of the battery when the battery temperature is abnormal, it is necessary to ensure the consistency of the battery temperature as much as possible.

Referring to FIG. 1 , it is a schematic structural diagram of a battery 101 according to an embodiment of the present invention. As shown in FIG. 1 , the inner cavity of the battery 101 is provided with a plurality of annular pipes 102 of different sizes, which are nested and arranged in the inner cavity of the battery 101 in a back-shaped shape. In addition, the inner cavity of the battery is also provided with a connecting pipe 103, an on-off valve 104, and a water inlet 106 and a water outlet 107 connecting the pipes. Outside the battery 101, a liquid tank 105 connected to the battery 101 through a connecting conduit 103 is also provided.

In the embodiment of the present invention, the liquid cooling pipeline for adjusting the battery temperature is set as the annular pipeline 102, and the area range that can be adjusted by each annular pipeline 102 is correspondingly divided into a temperature adjustment area. One or more temperature measuring components are deployed in each temperature adjustment area, which are used for real-time monitoring of the temperature abnormality of each temperature adjustment area in the battery 101 . The number of divided temperature adjustment areas is the same as the number of annular pipes 102 arranged in the inner cavity of the battery, and the temperature of each temperature adjustment area is adjusted by the annular pipes 102 inside.

Since each annular pipe 102 is distributed in a loop shape with the center of the battery as the origin, which is consistent with the direction of temperature change of the battery, the partition adjustment of different temperature adjustment areas inside the battery 101 is realized, and the temperature consistency of the battery 101 is ensured.

Referring to FIG. 1 , the inner cavity of the battery 101 is further provided with connecting pipes 103 for communicating with the various annular pipes 102 . The connecting pipe 103 is generally configured as a U-shaped pipe, and a plurality of port pairs are symmetrically arranged on the pipe bodies on both sides of the U-shaped pipe, and each port pair is used to connect two ports of an annular pipe 102 . And an on-off valve 104 for individually controlling the on-off of each annular pipeline 102 is provided at each interface. In some embodiments, the on-off valve 104 is typically a three-way valve.

The water inlet 106 and the water outlet 107 of the connecting pipe 103 are communicated with the liquid tank 105 external to the battery 101 . When the temperature of the battery 101 needs to be adjusted, the antifreeze liquid in the liquid tank 105 is introduced into each annular pipe 102 through the connecting pipe 103 , using antifreeze to adjust the temperature of the temperature adjustment area to which each annular pipe 102 belongs. When the battery temperature is too high, antifreeze can reduce the battery temperature to the normal level; when the battery temperature is too low, the antifreeze can also raise the battery temperature to the normal level.

With reference to the battery 101 shown in FIG. 1 , an embodiment of the present invention provides a battery system for realizing zonal adjustment of different temperature adjustment regions inside the battery 101 . As shown in FIG. 2 , the battery system includes the battery 101 shown in FIG. 1 and the battery management system BMS 201 .

The battery 101 is used to communicate with the annular pipe 102 in the corresponding abnormal temperature adjustment area according to the instructions of the battery management system BMS201 in the state of abnormal temperature, so as to realize the zonal adjustment of the battery temperature.

The battery management system BMS201 is respectively connected with the temperature measurement components deployed in each temperature adjustment area, and is used to obtain the temperature of each temperature adjustment area of the battery 101 through each temperature measurement component, and perform real-time monitoring. When the temperature of the battery 101 is abnormally high, too low, or the temperature difference is too large, the annular pipe 102 in the temperature adjustment area corresponding to the abnormal temperature is controlled to be connected to realize the temperature adjustment of the temperature adjustment area. And after the temperature of the battery 101 returns to a normal state, the annular pipe 102 connected to the control is disconnected to complete the temperature adjustment.

The battery management system BMS201 is also used for connecting with the on-off valve 104 of each annular pipe 102, and sending instructions to each annular pipe 102 to control its on-off.

Specifically, the on-off valves 104 provided at the interfaces connecting the connecting pipes 103 to the respective annular pipes 102 are all connected to the battery management system BMS201, and are used to individually control each annular pipe 102 under the instructions sent by the battery management system BMS201. on and off. When the battery 101 is working in a normal state, the on-off valves 104 are all in a disconnected state, and the annular pipes 102 controlled by the on-off valves 104 are also in an off state. When the battery management system BMS201 detects that the temperature is abnormal in the corresponding temperature adjustment area, it will send instruction information to the on-off valve 104 of the annular pipe 102 in the corresponding temperature area to control it to close to connect the corresponding annular pipe 102. At this time, the antifreeze will By connecting the pipes 103 into the corresponding annular pipes 102, the temperature adjustment of the temperature adjustment area is realized.

With reference to the battery system shown in FIG. 2 , an embodiment of the present invention provides a method for adjusting the temperature of a battery. Based on the method, it is possible to realize the zonal adjustment of each temperature adjustment area in the battery 101 . As shown in FIG. 3 , the method is applied to the battery management system BMS in the battery system, and the processing steps of the method include:

301. Acquire battery temperature data collected by each temperature measuring component.

Specifically, one or more temperature measuring components are deployed in each temperature adjustment area of the inner cavity of the battery for acquiring temperature data in each temperature adjustment area inside the battery. The battery management system BMS obtains the temperature data of each temperature adjustment area by monitoring the temperature information reported by each temperature measuring component in real time.

Among them, due to the problem of battery temperature distribution, the temperature in the same temperature adjustment area is also different. Therefore, in some cases, it is necessary to deploy multiple temperature measuring components in the same temperature adjustment area to sense the temperature difference in the same temperature adjustment area.

In some embodiments, the temperature measuring component is typically a temperature sensor.

302. Determine, according to the battery temperature data, abnormal temperature states of each temperature adjustment area of the battery.

Specifically, the battery management system BMS obtains the battery temperature data collected by the temperature measuring components in each temperature adjustment area respectively, and determines the highest temperature and the lowest temperature in each temperature adjustment area. The maximum temperature and the minimum temperature of each temperature adjustment area are compared respectively, and the maximum temperature value and the minimum temperature value of the battery are respectively determined.

The battery management system BMS determines the abnormal temperature state of each temperature regulation area of the battery according to the highest temperature value and the lowest temperature value.

When the maximum temperature value and the minimum temperature value are respectively between the preset high temperature threshold and low temperature threshold, and the difference between the maximum temperature value and the minimum temperature value does not exceed the set threshold, it is determined that the battery is in a normal state, and no temperature measurement is required. adjust.

When the maximum temperature value is greater than the set high temperature threshold, or the minimum temperature value is lower than the set low temperature threshold, or the temperature difference within the battery is greater than the set threshold, it is determined that the battery is in an abnormal temperature state, and it is necessary to connect the corresponding The annular pipe in the temperature regulation area realizes the regulation of the temperature in this area.

303 , according to the abnormal state of the battery temperature, determine the opening/closing state and sequence of the on-off valves of each annular pipeline.

Specifically, if it is detected that the highest temperature value in the battery is greater than the preset high temperature threshold, according to the order of temperature in each temperature adjustment area from high to low, the battery management system BMS controls the on-off valve of the annular pipe in the corresponding temperature adjustment area to close in turn , to achieve the connection of the annular pipeline. After the battery returns to a normal state and the temperature becomes stable, the annular pipes that control the communication are disconnected.

Optionally, if it is detected that the lowest temperature value in the battery is less than the preset low temperature threshold, the battery management system BMS will control the on-off valve of the annular pipeline in the corresponding temperature adjustment area in sequence according to the temperature of each temperature adjustment area from low to high. closed to achieve the communication of the annular pipe. After the battery returns to a normal state and the temperature becomes stable, the annular pipes that control the communication are disconnected.

Wherein, it is not necessary to communicate with all the annular pipes in the inner cavity of the battery when the temperature is adjusted. When it is determined that the battery temperature returns to a normal state after connecting some of the annular pipes, it is not necessary to continue to connect the remaining annular pipes.

Optionally, if it is detected that the difference between the highest temperature value and the lowest temperature value in the battery is greater than the set threshold, the temperature relationship between the highest temperature value, the lowest temperature value and the antifreeze in the liquid tank is compared respectively.

If the temperature of the antifreeze is lower than the minimum temperature value, according to the order of temperature in each temperature adjustment area from high to low, the battery management system BMS will control the on-off valve of the annular pipe in the corresponding temperature adjustment area to close, and adjust the temperature difference in the battery.

If the temperature of the antifreeze is greater than the maximum temperature value, the battery management system BMS will control the on/off valve of the annular pipe in the corresponding temperature adjustment area to close according to the order of the temperature in each temperature adjustment area from low to high, and adjust the temperature difference in the battery. .

If the temperature of the antifreeze is between the minimum temperature value and the maximum temperature value, the on-off valves of all the annular pipes are controlled by the battery management system BMS to close at the same time to adjust the temperature difference in the battery.

In the embodiment of the present invention, the annular pipes are arranged and arranged in a loop shape, which is used to adjust the temperature adjustment areas inside the battery by partition. Under the condition of maintaining the consistency of the battery temperature, the areas with abnormal temperature in the battery are preferentially adjusted to reduce the temperature. It reduces the energy consumption and ensures the safe use of the battery.

FIG. 4 is a schematic structural diagram of an embodiment of the battery management system BMS in this specification. As shown in FIG. 4 , the above-mentioned BMS may include at least one processor; and at least one memory connected in communication with the above-mentioned processor, wherein: the memory stores a Program instructions executed by a processor, where the processor invokes the program instructions to execute the battery temperature adjustment method provided in this embodiment.

The above-mentioned BMS may be a device capable of conducting intelligent dialogue with the user, such as a cloud server, and the specific form of the above-mentioned BMS is not limited in the embodiment of this specification. It can be understood that the BMS here is the machine mentioned in the method embodiment.

Figure 4 shows a block diagram of an exemplary BMS suitable for implementing embodiments of the present specification. The BMS shown in FIG. 4 is only an example, and should not impose any limitation on the function and scope of use of the embodiments of the present specification.

As shown in Figure 4, the BMS takes the form of a general-purpose computing device. Components of the BMS may include, but are not limited to, one or more processors 410 , a communication interface 420 , a memory 430 , a communication bus 440 connecting different system components (including the memory 430 , the communication interface 420 and the processing unit 410 ).

Communication bus 440 represents one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, a graphics acceleration port, a processor, or a local bus using any of a variety of bus structures. For example, these architectures include, but are not limited to, Industry Standard Architecture (hereinafter referred to as: ISA) bus, Micro Channel Architecture (hereinafter referred to as: MAC) bus, enhanced ISA bus, video electronic standard Association (Video Electronics Standards Association; hereinafter referred to as: VESA) local bus and Peripheral Component Interconnection (Peripheral Component Interconnection; hereinafter referred to as: PCI) bus.

A BMS typically includes a variety of computer system readable media. These media can be any available media that can be accessed by the BMS, including volatile and non-volatile media, removable and non-removable media.

The memory 430 may include a computer system readable medium in the form of volatile memory, such as random access memory (Random Access Memory; hereinafter referred to as: RAM) and/or cache memory. The BMS may further include other removable/non-removable, volatile/non-volatile computer system storage media. Memory 430 may include at least one program product having a set (eg, at least one) of program modules configured to perform the functions of the various embodiments of this specification.

A program/utility having a set (at least one) of program modules that may be stored in memory 430, such program modules including, but not limited to, an operating system, one or more application programs, other program modules, and program data , each or some combination of these examples may include an implementation of a network environment. Program modules typically perform the functions and/or methods of the embodiments described in this specification.

The processor 410 executes various functional applications and data processing by running the programs stored in the memory 430, for example, to implement the battery temperature adjustment method provided by the embodiments shown in this specification.

The embodiments of this specification provide a non-transitory computer-readable storage medium, where the non-transitory computer-readable storage medium stores computer instructions, and the computer instructions cause the computer to perform the battery temperature adjustment provided by the embodiments shown in this specification method.

The above-described non-transitory computer-readable storage media may employ any combination of one or more computer-readable media. The computer-readable medium may be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus or device, or a combination of any of the above. More specific examples (non-exhaustive list) of computer readable storage media include: electrical connections with one or more wires, portable computer disks, hard disks, random access memory (RAM), read only memory (Read Only Memory) ; hereinafter referred to as: ROM), erasable programmable read only memory (Erasable Programmable Read Only Memory; hereinafter referred to as: EPROM) or flash memory, optical fiber, portable compact disk read only memory (CD-ROM), optical storage devices, magnetic storage devices , or any suitable combination of the above. In this document, a computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

A computer-readable signal medium may include a propagated data signal in baseband or as part of a carrier wave, with computer-readable program code embodied thereon. Such propagated data signals may take a variety of forms including, but not limited to, electromagnetic signals, optical signals, or any suitable combination of the foregoing. A computer-readable signal medium can also be any computer-readable medium other than a computer-readable storage medium that can transmit, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device .

Program code embodied on a computer readable medium may be transmitted using any suitable medium including, but not limited to, wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

Computer program code for carrying out the operations of this specification may be written in one or more programming languages, including object-oriented programming languages—such as Java, Smalltalk, C++, but also conventional Procedural programming language - such as the "C" language or similar programming language. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer, or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any kind of network, including a Local Area Network (hereinafter referred to as: LAN) or a Wide Area Network (hereinafter referred to as: WAN), or may be connected to an external computer (eg using an internet service provider to connect via the internet).

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

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present specification, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.

Any process or method description in the flowcharts or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing custom logical functions or steps of the process , and the scope of the preferred embodiments of this specification includes alternative implementations in which the functions may be performed out of the order shown or discussed, including performing the functions substantially concurrently or in the reverse order depending upon the functions involved, which should It is understood by those skilled in the art to which the embodiments of this specification belong.

Depending on the context, the word "if" as used herein can be interpreted as "at" or "when" or "in response to determining" or "in response to detecting." Similarly, the phrases "if determined" or "if detected (the stated condition or event)" can be interpreted as "when determined" or "in response to determining" or "when detected (the stated condition or event)," depending on the context )" or "in response to detection (a stated condition or event)".

It should be noted that the terminals involved in the embodiments of this specification may include but are not limited to personal computers (Personal Computer; hereinafter referred to as: PC), personal digital assistants (Personal Digital Assistant; hereinafter referred to as: PDA), wireless handheld devices, tablet Computer (Tablet Computer), mobile phone, MP3 player, MP4 player, etc.

In the embodiments provided in this specification, it should be understood that the disclosed systems, devices and methods may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined. Or it can be integrated into another system, or some features can be omitted, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

In addition, each functional unit in each embodiment of this specification may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware, or may be implemented in the form of hardware plus software functional units.

The above-mentioned integrated units implemented in the form of software functional units can be stored in a computer-readable storage medium. The above-mentioned software functional unit is stored in a storage medium, and includes several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (Processor) to execute the methods described in the various embodiments of this specification. some steps.

The above descriptions are only preferred embodiments of this specification, and are not intended to limit this specification. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this specification shall be included in this specification. within the scope of protection.

Claims (10)

1. A battery is characterized in that a plurality of annular pipelines are arranged in an inner cavity of the battery, each annular pipeline is communicated with a liquid tank, a switch valve is arranged on a communication passage of each annular pipeline and the liquid tank, and each switch valve is used for being connected with a battery management system BMS;

the plurality of annular pipelines divide the inner cavity of the battery into a plurality of temperature regulation areas, the battery is further provided with a temperature measurement component for acquiring temperature data of each temperature regulation area, and the temperature measurement component is used for sending the temperature data of each temperature regulation area to the BMS, so that the BMS determines the abnormal state of the battery temperature according to the temperature data of each temperature regulation area, and controls the open/close state and the sequence of each switch valve according to the abnormal state of the battery temperature, so that the antifreeze in the liquid tank flows through the annular pipeline with the closed switch valve.

2. The battery of claim 1, wherein the battery cavity is further provided with a connecting pipe, and a water outlet and a water inlet of the connecting pipe are communicated with the liquid tank;

and the interface of each annular pipeline is communicated with the pipe body of the connecting pipeline so as to be communicated with the liquid tank through the connecting pipeline.

3. The battery of claim 2, wherein the connecting conduit is a U-shaped conduit;

the U-shaped pipeline is provided with a plurality of interface pairs, each interface pair is symmetrically distributed on two sides of the U-shaped body, and each interface pair is used for connecting two interfaces of one annular pipeline.

4. The battery according to any one of claims 1-3, wherein the plurality of circular pipes are circular pipes with different sizes, and the circular pipes are sequentially nested according to the size order.

5. A battery temperature adjusting method, characterized in that the method employs a battery management system BMS connected to a switching valve and a temperature measuring part in a battery according to any one of claims 1 to 4, the BMS performing the method, comprising:

acquiring battery temperature data acquired by each temperature measurement component, wherein each temperature measurement component is respectively deployed in each temperature regulation area of the inner cavity of the battery;

determining the temperature abnormal state of each temperature adjusting area of the battery according to the battery temperature data;

and determining the opening/closing state and sequence of the switch valves of each annular pipeline according to the abnormal state of the battery temperature.

6. The method according to claim 5, wherein the determining of the abnormal temperature state of each temperature regulation region of the battery based on the battery temperature data comprises:

determining a maximum temperature value and a minimum temperature value from the battery temperature data;

if the highest temperature value is larger than the high-temperature threshold value, sequentially controlling the switch valves of the annular pipelines in the corresponding temperature adjusting areas to be closed according to the sequence of the temperature of each temperature adjusting area from high to low;

and if the lowest temperature value is smaller than the low-temperature threshold value, sequentially controlling the switch valves of the annular pipelines in the corresponding temperature adjusting areas to be closed according to the sequence of the temperatures of the temperature adjusting areas from low to high.

7. The method according to claim 5, wherein the battery temperature abnormal state is determined based on the temperature data of the respective temperature regulation regions, the method further comprising:

determining a maximum temperature value and a minimum temperature value from the battery temperature data;

if the difference value between the highest temperature value and the lowest temperature value is larger than a set threshold value, respectively comparing the temperature relationship between the highest temperature value and the antifreeze liquid in the liquid tank and the temperature relationship between the lowest temperature value and the antifreeze liquid in the liquid tank;

if the temperature of the antifreeze is lower than the lowest temperature value, sequentially controlling the on-off valves of the annular pipelines in the corresponding temperature adjusting areas to be closed according to the sequence of the temperature of each temperature adjusting area from high to low;

if the temperature of the antifreeze is higher than the highest temperature value, sequentially controlling the switch valves of the annular pipelines in the corresponding temperature adjusting areas to be closed according to the sequence of the temperature of each temperature adjusting area from low to high;

and if the temperature of the antifreeze is between the lowest temperature value and the highest temperature value, closing the switch valves of all the annular pipelines.

8. The method according to any one of claims 6-7, wherein the determining a highest temperature value and a lowest temperature value from the battery temperature data comprises:

determining the highest temperature and the lowest temperature in each temperature adjusting area from battery temperature data acquired by each temperature measuring component;

respectively comparing the highest temperature and the lowest temperature of each temperature adjusting area;

determining the highest temperature with the highest temperature value as the highest temperature value;

determining the lowest temperature with the lowest temperature value as the lowest temperature value.

9. The method according to claim 5, wherein after determining the open/close state and the sequence of the open/close valves of the respective ring conduits according to the battery temperature abnormal state, the method comprises:

and when the battery temperature is determined to be recovered to the normal state from the abnormal state, opening and closing valves of the annular pipelines which are completely closed.

10. A Battery Management System (BMS), comprising:

at least one processor; and

at least one memory communicatively coupled to the processor, wherein:

the memory stores program instructions executable by the processor, the processor invoking the program instructions to perform the method of any of claims 5 to 9.

Images