A control device, method, battery, and vehicle of a flexible battery thermal management system

Abstract

The application is a control device, method, battery and vehicle of a flexible battery thermal management system. It comprises a battery monomer, a flexible top pipe, a battery lower box, a flexible side pipe, an electromagnetic fixer and a sliding rod. The lower end of the flexible top pipe is fixed on the battery monomer. The sliding rod is fixed on both sides of the battery monomer. The flexible side pipe is fixed on the sliding rod through the electromagnetic fixer. One end of the flexible side pipe is connected with a vehicle water pump. The other end of the flexible side pipe is connected with the flexible side pipes on both sides of the battery monomer. The other side of the flexible side pipe is connected with a loop of a battery thermal management system BMS. The electromagnetic fixer is connected with a vehicle HCU. The battery monomer is connected with a battery management system BMS. When the battery monomer has thermal runaway, the explosion-proof valve can break the flexible top pipe, and the cooling liquid flows out to extinguish the flame of the battery monomer and delay the thermal runaway. The application can ensure the consistency of the temperature of the power battery, delay the thermal runaway of the battery, improve the safety performance of the system, and improve the thermal management performance and service life of the battery liquid cooling plate.

Description

Technical Field

[0001] This invention relates to the field of automotive technology, specifically to a control device, method, battery, and vehicle for a flexible battery thermal management system. Background Technology

[0002] As a key component of new energy vehicles, the importance of the thermal management system for power batteries is self-evident. Currently, the mainstream battery thermal management system is the battery liquid cooling plate, which has a relatively complex structure and two major problems: 1. The complex structure of the thermal management system leads to uneven temperature distribution in the battery, which can easily cause poor thermal performance consistency between different cells; 2. The thermal management system cannot solve the problem of temperature consistency within the battery cells.

[0003] An existing power battery thermal management system and control method are disclosed. The system includes an expansion tank, an electric water pump, a power battery, a cooling module, a first solenoid valve, a second solenoid valve, a heat exchanger with an integrated expansion valve, a third solenoid valve, an air conditioning compressor and condenser, a fuel heater assembly, and a fourth solenoid valve. The control method, utilizing the above system, includes the following steps: obtaining the coolant temperature Tb at the power battery inlet; if the coolant temperature Tb at the power battery inlet is greater than the lower limit temperature Tb0 at the power battery inlet, selectively opening either the first circulation path or the second circulation path. This thermal management system ensures the battery operates at a suitable temperature, and the cooling module, the heat exchanger with the integrated expansion valve, and the fuel heater assembly can be flexibly arranged according to the situation, without being limited by vehicle space, resulting in flexible vehicle layout and high space utilization.

[0004] Furthermore, a battery thermal management control method, apparatus, medium, and device are provided. The method includes: predicting the battery temperature during the target trip based on road conditions, or predicting the battery temperature during the target charging process based on the magnitude of the charging current; and controlling the heating or cooling of the battery based on the predicted temperature. In other words, predicting the battery temperature change during future charging / discharging processes based on battery usage, and performing thermal management based on this predicted temperature, enables the battery to operate in a better state, effectively reduces system redundancy, minimizes unnecessary energy waste, and lowers overall vehicle thermal management power consumption.

[0005] A battery thermal management control method, a battery management controller, a system, and a vehicle are disclosed. The method includes: acquiring the maximum heating temperature value of a current module and comparing it with a preset temperature threshold; if the maximum heating temperature value of the current module is greater than or equal to the preset temperature threshold, then shutting down the heating circuit of the current module; selecting the module with the shortest shutdown time from the currently shut-down modules as a target module; acquiring the temperature value of the target module and the maximum temperature values ​​of other modules that are not shut down; comparing the temperature value of the target module with the maximum temperature values ​​of other modules that are not shut down; if the maximum temperature values ​​of other modules that are not shut down are greater than or equal to the temperature value of the target module, then shutting down the heating circuits of the other modules that are not shut down. The battery management controller shuts down the heating circuits of modules based on the comparison results of the module temperature values, reducing the temperature difference between modules, improving the lifespan of the power battery system, and increasing the vehicle's driving range.

[0006] The control devices and methods of the aforementioned battery thermal management system have complex structures and poor thermal management performance of the power battery. Summary of the Invention

[0007] This invention provides a control device for a flexible battery thermal management system, which can ensure the consistency of power battery temperature, delay battery thermal runaway, improve system safety performance, and enhance the thermal management performance and service life of the battery liquid cooling plate. It mainly solves the problem of poor thermal management consistency in existing battery thermal management systems.

[0008] The technical solution of this invention is described below in conjunction with the accompanying drawings:

[0009] In a first aspect, embodiments of the present invention provide a control device for a flexible battery thermal management system, comprising a battery cell 1, a flexible top tube 2, a lower battery housing 3, a flexible side tube 4, an electromagnetic clamp 5, and a sliding rod 6; the lower end of the flexible top tube 2 is fixed to the upper end of the battery cell 1; the sliding rod 6 is fixed to both sides of the battery cell 1; the flexible side tube 4 is fixed to the sliding rod 6 by the electromagnetic clamp 5; one end of the flexible side tube 4 is connected to a vehicle water pump, and the vehicle water pump is connected to the vehicle HCU; the other end of the flexible side tube 4 is connected to one side of the flexible side tube 4 on both sides of the battery cell 1; the other side of the flexible side tube 4 is connected to the circuit of the battery thermal management system (BMS); the lower end of the battery cell 1 is fixed to the lower battery housing 3; the electromagnetic clamp 5 is connected to the vehicle HCU; and the battery cell 1 is connected to the battery management system (BMS).

[0010] Furthermore, the flexible top tube 2 is made of flexible circular tube material, with one end being flat and tightly fixed to the top plane of the battery cell 1, and the other end being a semi-circular structure.

[0011] Furthermore, the flexible top tube 2 is fixed to the upper part of the explosion-proof valve on the top edge of the battery cell 1, and it is arranged in a serpentine bend.

[0012] Furthermore, the flexible side tube 4 is made of flexible circular tube material, with one end being flat and closely attached to the side plane of the battery cell 1, and the other end being a semi-circular structure.

[0013] Furthermore, the electromagnetic fastener 5 has a through hole inside; the flexible side tube 4 passes through the through hole; the electromagnetic fastener 5 slides on the sliding rod 6 through electromagnetic induction.

[0014] Furthermore, the flexible side tube 4 is arranged in a serpentine bend.

[0015] Secondly, the present invention also provides a control method for a control device of a flexible battery thermal management system, comprising the following steps:

[0016] Step 1: The Battery Management System (BMS) collects the temperature of battery cell 1;

[0017] Step 2: The Battery Management System (BMS) determines the control mode based on the collected temperature of the battery cell 1 and executes the corresponding control mode. The control modes are divided into three types: no-operation mode, thermal management mode, and thermal runaway mode.

[0018] Step 3: The Battery Management System (BMS) collects the temperature of battery cell 1 again and sends a signal feedback on the collected temperature of battery cell 1 to determine whether it meets the standard. If it does not meet the standard, repeat step 2; otherwise, exit control.

[0019] Further, in step two, the highest temperature of battery cell 1 collected by the battery management system (BMS) is defined as TM; the lowest temperature of battery cell 1 collected by the battery management system (BMS) is defined as TN; the temperature difference is defined as TC, where TC = TM - TN; the temperature difference is calculated from the test data collected every second; the thermal runaway trigger temperature is set as TS, and the thermal management mode trigger temperature is set as TR.

[0020] No working mode: TC≤TR, the battery management system (BMS) does not operate, and all electromagnetic retainers 5 are not working;

[0021] Thermal Management Mode: TC>TR, the Battery Management System (BMS) sends a signal command, and the electromagnetic retainers 5 at the highest and lowest temperature positions in battery cell 1 drive the flexible side tube 4 to start sliding. After working in thermal management mode for 5 minutes, it enters action feedback.

[0022] Thermal runaway mode: TC≥TS, the battery management system (BMS) sends a demand command to the vehicle HCU, which in turn sends a command to the vehicle water pump connected in series with the battery thermal management system to rotate at twice the normal speed to supply coolant. In addition, the vehicle HCU controls the explosion-proof valve, which breaks through the flexible jacking pipe 2, and the coolant flows out at an accelerated speed to extinguish the battery thermal runaway flame, further delaying thermal runaway.

[0023] Step 3: TC≤TR meets the standard.

[0024] Thirdly, embodiments of the present invention also provide a battery, including a control device for a flexible battery thermal management system.

[0025] Fourthly, embodiments of the present invention also provide a vehicle, including a battery.

[0026] The beneficial effects of this invention are as follows:

[0027] 1) In this invention, the flexible top tube is arranged in a curved manner and is arranged in a serpentine pattern along the side of the battery cell to increase the heat exchange area and reduce the temperature difference inside the same battery cell.

[0028] 2) In this invention, the flexible side tubes are arranged in a curved manner, serpentine along the side of the battery cell, which increases the heat exchange area and reduces the temperature difference inside the same cell.

[0029] 3) In this invention, the electromagnetic fixing device can receive instructions from the battery BMS and slide along the direction of the sliding rod through the principle of electromagnetic induction, thereby driving the flexible side tube to slide.

[0030] 4) In this invention, the flexible jacking pipe is arranged above the explosion-proof valve on the top edge of the battery cell. When the battery cell experiences thermal runaway, the explosion-proof valve can break through the flexible jacking pipe, allowing the coolant to flow out, extinguishing the flame of the battery cell, and delaying thermal runaway.

[0031] 5) This invention can ensure the consistency of power battery temperature, delay battery thermal runaway, improve system safety performance, and enhance the thermal management performance and service life of battery liquid cooling plate. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the overall structure of the control device of the flexible battery thermal management system described in this invention from one angle.

[0034] Figure 2 This is a schematic diagram of the main view of the present invention;

[0035] Figure 3 This is a schematic diagram of the overall structure of the present invention from another angle;

[0036] Figure 4This is a top view of the present invention;

[0037] Figure 5 This is a partial enlarged view of the structure of the invention from a top view schematic diagram;

[0038] Figure 6 This is a flowchart illustrating the control method of a flexible battery thermal management system according to the present invention.

[0039] In the picture:

[0040] 1. Battery cell;

[0041] 2. Flexible pipe jacking;

[0042] 3. Lower battery housing;

[0043] 4. Flexible edge tube;

[0044] 5. Electromagnetic fastener;

[0045] 6. Sliding rod. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0048] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0049] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0050] Example 1

[0051] See Figures 1-3 A control device for a flexible battery thermal management system includes a battery cell 1, a flexible top tube 2, a lower battery housing 3, a flexible side tube 4, an electromagnetic fixing device 5, and a sliding rod 6.

[0052] The lower end of the flexible top tube 2 is fixed to the upper end of the battery cell 1; the sliding rod 6 is fixed to both sides of the battery cell 1; the flexible side tube 4 is fixed to the sliding rod 6 by an electromagnetic fixing device 5; one end of the flexible side tube 4 is connected to the vehicle water pump, and the vehicle water pump is connected to the vehicle HCU; the other end of the flexible side tube 4 is connected to one side of the flexible side tube 4 on both sides of the battery cell 1; the other side of the flexible side tube 4 is connected to the circuit of the battery thermal management system (BMS); the lower end of the battery cell 1 is fixed to the lower battery housing 3; the electromagnetic fixing device 5 is connected to the vehicle HCU; the battery cell 1 is connected to the battery management system (BMS).

[0053] See Figures 3-5 The flexible top tube 2 is made of flexible circular tube material, with one end being flat and tightly fixed to the top plane of the battery cell 1, and the other end being a semi-circular structure.

[0054] The flexible top tube 2 is fixed above the explosion-proof valve on the top edge of the battery cell 1. It is arranged in a serpentine bend along the side of the battery cell 1 to increase the heat exchange area and reduce the temperature difference inside the same cell.

[0055] The flexible side tube 4 is made of flexible circular tube material, with one end being flat and closely attached to the side plane of the battery cell 1, and the other end being a semi-circular structure. The flexible side tube 4 is arranged in a serpentine bend; it is arranged in a serpentine pattern along the side of the battery cell 1 to increase the heat exchange area and reduce the temperature difference within the same cell.

[0056] The battery thermal management system (BMS) can simultaneously manage the thermal properties of the side and top edges of battery cell 1, thereby improving the temperature uniformity of battery cell 1.

[0057] The electromagnetic fastener 5 has a through hole inside; the flexible side tube 4 passes through the through hole. The electromagnetic fastener 5 can receive commands from the battery BMS and slide along the direction of the sliding rod 6 through the principle of electromagnetic induction, thereby driving the flexible side tube 4 to slide.

[0058] The flexible jacking pipe 2 is arranged above the explosion-proof valve on the top edge of the battery cell 1. When the battery cell 1 experiences thermal runaway, the explosion-proof valve can break through the flexible jacking pipe 2, allowing the coolant to flow out, extinguishing the flame of the battery cell 1, and delaying thermal runaway.

[0059] Example 2

[0060] See Figure 6 A control method for a control device of a flexible battery thermal management system includes the following steps:

[0061] Step 1: The Battery Management System (BMS) collects the temperature of battery cell 1;

[0062] Step 2: The Battery Management System (BMS) determines the control mode based on the collected temperature of the battery cell 1 and executes the corresponding control mode. The control modes are divided into three types: no-operation mode, thermal management mode, and thermal runaway mode.

[0063] Define the highest temperature of battery cell 1 collected by the battery management system (BMS) as TM; the lowest temperature of battery cell 1 collected by the battery management system (BMS) as TN; the temperature difference as TC, TC = TM - TN; the temperature difference is calculated from the test data every second; set the thermal runaway trigger temperature as TS, and the thermal management mode trigger temperature as TR.

[0064] No working mode: TC≤TR, the battery management system (BMS) does not operate, and all electromagnetic retainers 5 are not working;

[0065] Thermal Management Mode: TC>TR, the Battery Management System (BMS) sends a signal command, and the electromagnetic retainers 5 at the highest and lowest temperature positions in battery cell 1 drive the flexible side tube 4 to start sliding. After working in thermal management mode for 5 minutes, it enters action feedback.

[0066] Thermal runaway mode: TC≥TS, the battery management system (BMS) sends a demand command to the vehicle HCU, which in turn sends a command to the vehicle water pump connected in series with the battery thermal management system to rotate at twice the normal speed to supply coolant. In addition, the vehicle HCU controls the explosion-proof valve, which breaks through the flexible jacking pipe 2, and the coolant flows out at an accelerated speed to extinguish the battery thermal runaway flame, further delaying thermal runaway.

[0067] Step 3: The Battery Management System (BMS) collects the temperature of battery cell 1 again and sends a signal feedback on the collected temperature of battery cell 1 to determine whether it meets the standard. If TC≤TR, it meets the standard; if it does not meet the standard, repeat step 2; otherwise, exit control.

[0068] This invention can ensure the consistency of power battery temperature, delay battery thermal runaway, improve system safety performance, and enhance the thermal management performance and service life of battery liquid cooling plates.

[0069] Example 3

[0070] This embodiment also provides a battery, which includes the control device of the above-mentioned flexible battery thermal management system, including a battery cell 1, a flexible top tube 2, a lower battery housing 3, a flexible side tube 4, an electromagnetic fixing device 5, and a sliding rod 6.

[0071] The lower end of the flexible top tube 2 is fixed to the upper end of the battery cell 1; the sliding rod 6 is fixed to both sides of the battery cell 1; the flexible side tube 4 is fixed to the sliding rod 6 by an electromagnetic fixing device 5; one end of the flexible side tube 4 is connected to the vehicle water pump, and the vehicle water pump is connected to the vehicle HCU; the other end of the flexible side tube 4 is connected to one side of the flexible side tube 4 on both sides of the battery cell 1; the other side of the flexible side tube 4 is connected to the circuit of the battery thermal management system (BMS); the lower end of the battery cell 1 is fixed to the lower battery housing 3; the electromagnetic fixing device 5 is connected to the vehicle HCU; the battery cell 1 is connected to the battery management system (BMS).

[0072] The flexible top tube 2 is made of flexible circular tube material, with one end being flat and tightly fixed to the top plane of the battery cell 1, and the other end being a semi-circular structure.

[0073] The flexible top tube 2 is fixed above the explosion-proof valve on the top edge of the battery cell 1. It is arranged in a serpentine bend along the side of the battery cell 1 to increase the heat exchange area and reduce the temperature difference inside the same cell.

[0074] The flexible side tube 4 is made of flexible circular tube material, with one end being flat and closely attached to the side plane of the battery cell 1, and the other end being a semi-circular structure. The flexible side tube 4 is arranged in a serpentine bend; it is arranged in a serpentine pattern along the side of the battery cell 1 to increase the heat exchange area and reduce the temperature difference within the same cell.

[0075] The electromagnetic fastener 5 has a through hole inside; the flexible side tube 4 passes through the through hole. The electromagnetic fastener 5 can receive commands from the battery BMS and slide along the direction of the sliding rod 6 through the principle of electromagnetic induction, thereby driving the flexible side tube 4 to slide.

[0076] The battery thermal management system (BMS) can simultaneously manage the thermal properties of the side and top edges of battery cell 1, thereby improving the temperature uniformity of battery cell 1.

[0077] The flexible jacking pipe 2 is arranged above the explosion-proof valve on the top edge of the battery cell 1. When the battery cell 1 experiences thermal runaway, the explosion-proof valve can break through the flexible jacking pipe 2, allowing the coolant to flow out, extinguishing the flame of the battery cell 1, and delaying thermal runaway.

[0078] Batteries that include a control device for a flexible battery thermal management system are safer.

[0079] Example 4

[0080] This embodiment also provides a vehicle that includes the battery described above, and the installation of the battery improves the stability and safety of the vehicle.

[0081] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the scope of protection of the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, any person skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of the present invention within the scope of the technology disclosed in the present invention. These simple modifications are all within the scope of protection of the present invention.

[0082] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

[0083] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. A control device for a flexible battery thermal management system, characterized by, It includes battery monomer (1), flexible top pipe (2), battery lower box (3), flexible side pipe (4), electromagnetic fixer (5) and sliding rod (6); The lower end of the flexible top pipe (2) is fixed at the upper end of the battery monomer (1); The sliding rod (6) is fixed on both sides of the battery monomer (1); The flexible side pipe (4) is fixed on the sliding rod (6) through the electromagnetic fixer (5); One end of the flexible side pipe (4) is connected with the vehicle water pump, and the vehicle water pump is connected with the vehicle HCU; The other end of the flexible side pipe (4) is connected with one side of the flexible side pipe (4) on both sides of the battery monomer (1); The other side of the flexible side pipe (4) is connected with the loop of the battery thermal management system BMS; The lower end of the battery monomer (1) is fixed on the battery lower box (3); The electromagnetic fixer (5) is connected with the vehicle HCU; The battery monomer (1) is connected with the battery management system BMS; The flexible top pipe (2) is a flexible round pipe material, one end of which is a plane and is fixed tightly with the top plane of the battery monomer (1), and the other end is a semicircular structure; The flexible top pipe (2) is fixed on the upper part of the explosion-proof valve on the top edge of the battery monomer (1), which is arranged in a serpentine curve; The flexible side pipe (4) is a flexible round pipe material, one end of which is a plane and is fixed tightly with the side plane of the battery monomer (1), and the other end is a semicircular structure; The electromagnetic fixer (5) is provided with a through hole in the inside; The flexible side pipe (4) passes through the through hole; The electromagnetic fixer (5) receives the instruction of the battery BMS, and slides along the direction of the sliding rod (6) through the electromagnetic induction principle, thereby driving the flexible side pipe (4) to slide; The flexible side pipe (4) is arranged in a serpentine curve.

2. The control method of claim 1, wherein It includes the following steps: Step one, the battery management system BMS collects the temperature of the battery monomer (1); Step two, the battery management system BMS judges according to the collected temperature of the battery monomer (1), judges the control mode and executes the corresponding control mode; Among them, the control mode is divided into three kinds: no work mode, thermal management mode and thermal runaway mode; Step three, the battery management system BMS collects the temperature of the battery monomer (1) again, and feeds back the collected temperature of the battery monomer (1), judges whether it meets the standard, if not, repeats step two; Otherwise, exit control; Among them, step two, define the highest temperature of the battery monomer (1) collected by the battery management system BMS as TM; The lowest temperature of the battery monomer (1) collected by the battery management system BMS is TN; The temperature difference is TC, TC=TM-TN; The temperature difference is calculated from the implementation test data every second; Set the thermal runaway trigger temperature as TS, and the thermal management mode trigger temperature as TR; No work mode: TC≤TR, the battery management system BMS does not act, and all electromagnetic fixers (5) do not work; Thermal management mode: TC>TR, the battery management system BMS sends a signal instruction, the electromagnetic fixer (5) drives the flexible side pipe (4) to start sliding, and the thermal management mode works for 5 minutes and then enters the action feedback. Thermal runaway mode: TC≥TS, the battery management system BMS sends demand instructions to the vehicle HCU, the HCU sends instructions to the vehicle water pump in series in the battery thermal management system, and the cooling liquid is rotated according to the normal two times speed, and the vehicle HCU controls the explosion-proof valve, the flexible top pipe (2) is broken by the explosion-proof valve, the cooling liquid is accelerated to flow out to extinguish the battery thermal runaway flame, and the thermal runaway is further delayed; Step three, TC≤TR is up to standard.

3. A battery, characterized by A control device of a flexible battery thermal management system according to claim 1.

4. A vehicle characterized by comprising: A battery according to claim 3.

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