Battery box temperature adjusting method, temperature adjusting system, and working machine

Abstract

The application relates to the technical field of battery thermal management, and provides a battery box temperature adjusting method, a temperature adjusting system and a working machine. The method comprises the following steps: obtaining a battery box internal environment temperature T1 and a battery cell surface temperature T2; when the battery box internal environment temperature T1 is not in a battery cell optimal working temperature interval, controlling a whole vehicle thermal management module to adjust the battery box internal environment temperature, so that the battery box internal environment temperature is in the battery cell optimal working temperature interval; when the battery cell surface temperature T2 is not in the battery cell optimal working temperature interval, controlling a battery cell thermal management module to adjust the battery cell surface temperature, so that the battery cell surface temperature is in the battery cell optimal working temperature interval. When the battery box internal environment temperature T1 or the battery cell surface temperature T2 is not in the battery cell optimal working temperature interval, the whole vehicle thermal management module and the battery cell thermal management module work simultaneously, so that the battery cell is in the battery cell optimal working temperature interval, and the use efficiency and the cycle life of the battery cell are increased.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery thermal management, and particularly relates to a battery box temperature adjusting method, a temperature adjusting system and a working machine. BACKGROUND

[0002] At present, with vigorous promotion of new energy vehicles, electric vehicles develop rapidly, and the core component of the electric vehicle is a battery box for storing energy. In a low-temperature environment, battery charging is difficult, and the capacity greatly decays, which seriously affects the battery performance. In a high-temperature environment, the battery charging and discharging easily generates a large amount of heat, which easily causes an explosion risk, and it is a great challenge for battery thermal management.

[0003] In the prior art, in order to improve the charging and discharging performance of the battery cell, a battery box with a temperature control system is usually arranged, that is, a special temperature control system is arranged for the battery box. When the temperature of the battery box is low, the temperature control system heats the surface of the battery cell. When the temperature of the battery box is high, the temperature control system reduces the temperature of the surface of the battery cell.

[0004] The CTP (Cell To Pack) technology and the CTC (Cell To Chassis) technology, which are mainly promoted in the industry, are technologies of directly integrating the battery cell into the chassis. A large number of batteries are densely integrated in a large space. The battery box thermal management scheme in the prior art cannot meet the thermal management needs of the CTP technology and the CTC technology. SUMMARY

[0005] The present application provides a battery box temperature adjusting method, a temperature adjusting system and a working machine, which solve the problem that the battery box thermal management scheme in the prior art cannot meet the thermal management needs of the CTC and CTP high-density battery cells, and realize that the battery cell is always in the best temperature range, thereby increasing the use efficiency and cycle life of the battery cell.

[0006] The present application provides a battery box temperature adjusting method, which comprises the following steps:

[0007] obtaining an internal environment temperature T1 of the battery box and a battery cell surface temperature T2;

[0008] determining that the internal environment temperature T1 of the battery box is not in a battery cell optimal working temperature range [T0 min , T0 max ], and controlling a vehicle thermal management module to adjust the internal environment temperature of the battery box, so that the internal environment temperature of the battery box is in the battery cell optimal working temperature range [T0 min , T0 max ];

[0009] determining that the cell surface temperature T2 is not in the cell optimal working temperature interval [T0 min , T0 max ], controlling the cell thermal management module to adjust the cell surface temperature so that the cell surface temperature is in the cell optimal working temperature interval [T0 min , T0 max ]

[0010] According to the battery box temperature adjusting method provided by the application, when the internal environment temperature T1 of the battery box is in the cell optimal working temperature interval [T0 min , T0 max ], the circulating heat preservation module is controlled to work, and the circulating heat preservation module is used to promote the flow of the heat conduction medium, so that the internal environment temperature of the battery box is always in the cell optimal working temperature interval [T0 min , T0 max ].

[0011] According to the battery box temperature adjusting method provided by the application, when the internal environment temperature T1 of the battery box is not in the cell optimal working temperature interval [T0 min , T0 max ], the whole vehicle thermal management module is controlled to adjust the internal environment temperature of the battery box, and the step comprises the following steps.

[0012] When the internal environment temperature of the battery box is less than T0 min , the whole vehicle heat source module is controlled to raise the internal environment temperature of the battery box; wherein the whole vehicle thermal management module comprises the whole vehicle heat source module.

[0013] According to the battery box temperature adjusting method provided by the application,

[0014] When the internal environment temperature T1 of the battery box is not in the cell optimal working temperature interval [T0 min , T0 max ], the whole vehicle thermal management module is controlled to adjust the internal environment temperature of the battery box, and the step comprises the following steps.

[0015] When the internal environment temperature of the battery box is greater than T0 max , the whole vehicle heat dissipation module is controlled to reduce the internal environment temperature of the battery box; wherein the whole vehicle thermal management module comprises the whole vehicle heat dissipation module.

[0016] According to the battery box temperature adjusting method provided by the application, when the internal environment temperature T1 of the battery box is not in the cell optimal working temperature interval [T0 min , T0 maxwhen the battery case internal environment temperature T1 is less than T0 min , and when it is determined that the cell surface temperature T2 is not in the cell optimal working temperature interval [T0 min , T0 max ], comprising:

[0017] preferentially determining whether the battery case internal environment temperature T1 is in the cell optimal working temperature interval [T0 min , T0 max ].

[0018] According to the battery case temperature adjusting method provided by the application, when the battery case internal environment temperature T1 is less than T0 min , the step comprises:

[0019] when the battery case internal environment temperature T1 is less than 0℃, the whole vehicle heat source module and the cell heat management module are controlled to be turned on.

[0020] Another aspect of the application is to provide a battery case temperature adjusting system, comprising:

[0021] a temperature detection module, configured to acquire the battery case internal environment temperature T1 and the cell surface temperature T2 respectively;

[0022] an environment temperature control module, configured to adjust the battery case internal environment temperature;

[0023] a whole vehicle heat management module, connected with the environment temperature control module, configured to adjust the temperature of the environment temperature control module;

[0024] a cell heat management module, configured to adjust the temperature of the cell surface;

[0025] a control module, electrically connected with the temperature detection module and the whole vehicle heat dissipation module, configured to control the whole vehicle heat management module and the cell heat management module to be turned on or turned off according to the detection result of the temperature detection module.

[0026] According to the battery case temperature adjusting system provided by the application, further comprising a multi-way valve and a circulating heat preservation module, the multi-way valve is electrically connected with the control module, and one of the whole vehicle heat management module, the circulating heat preservation module and the environment temperature control module is connected with one of the multi-way valve; the circulating heat preservation module is configured to promote the circulation of the heat conduction medium to keep the battery case internal environment temperature unchanged.

[0027] According to the battery case temperature adjusting system provided by the application, the whole vehicle heat management module comprises:

[0028] a whole vehicle heat source module, connected with one of the multi-way valve, configured to heat the environment temperature control module;

[0029] The whole vehicle heat dissipation module is connected with another path of the multi-way valve, and the whole vehicle heat dissipation module is used for refrigerating the environment temperature control module.

[0030] The application also provides a working machine comprising the battery box temperature regulating system.

[0031] The battery box temperature regulating method provided by the application comprises the following steps: obtaining an internal environment temperature T1 of a battery box and a cell surface temperature T2; when the internal environment temperature T1 of the battery box is not in a cell optimal working temperature interval [T0 min , T0 max ], controlling a whole vehicle heat management module to adjust the internal environment temperature of the battery box, so that the internal environment temperature of the battery box is in the cell optimal working temperature interval [T0 min , T0 max ]; when the cell surface temperature T2 is not in the cell optimal working temperature interval [T0 min , T0 max ], controlling a cell heat management module to adjust the cell surface temperature, so that the cell surface temperature is in the cell optimal working temperature interval [T0 min , T0 max ]; and through the whole vehicle heat management module, the internal environment temperature of the battery box is controlled to be in the cell optimal working temperature interval [T0 min , T0 max ], and then the cell heat management module is used for rapidly heating or high-temperature cooling the cell, so that the cell is always in the environment temperature of the optimal temperature interval, the use efficiency and the cycle life of the cell are increased, the method is suitable for the heat management of the large integrated battery such as the CTC and the CTP, the temperature of the battery box can be well adjusted, and the internal environment temperature T1 of the battery box and the cell surface temperature T2 are obtained, so that the regional temperature difference is compensated.

[0032] In addition, the whole vehicle heat management module is a structure for heat dissipation and cooling in the whole vehicle, the whole vehicle heat dissipation module in the prior art is applied to the battery box temperature regulation, the cell is always in the environment temperature of the optimal temperature interval, and excessive cost is not increased.

[0033] The battery box temperature regulating system provided by the application comprises a temperature detection module, an environment temperature control module and a whole vehicle heat management module, the temperature detection module is used for obtaining an internal environment temperature of a battery box and a cell surface temperature, the environment temperature control module is used for adjusting the internal environment temperature of the battery box, and the whole vehicle heat management module is used for adjusting the temperature of the environment temperature control module; a cell heat management module is used for adjusting the cell surface temperature, and a control module is used for controlling the opening and the closing of the whole vehicle heat management module and the cell heat management module according to the detection result of the temperature detection module, so that the battery box is always in an optimal working temperature interval, and the use efficiency and the cycle life of the cell are improved.

[0034] The application also provides a working machine, which has various advantages as described above due to comprising the battery box temperature regulating system as described above. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0036] Figure 1 is one of the flowcharts of the battery box temperature regulating method provided by the application;

[0037] Figure 2 is a structural schematic diagram of the battery box temperature regulating system provided by the application;

[0038] Figure 3 is a structural block diagram of the whole vehicle thermal management module provided by the application;

[0039] Figure 4 is a structural block diagram of the temperature detection module provided by the application;

[0040] Figure 5 is a structural schematic diagram of the electronic device provided by the application;

[0041] LIST OF REFERENCE NUMERALS

[0042] 1, battery box; 2, whole vehicle thermal management module; 21, whole vehicle heat source module; 22, whole vehicle heat dissipation module; 3, circulating heat preservation module; 4, temperature detection module; 41, first detection module; 42, second detection module; 5, cell thermal management module; 6, environmental temperature control module; 7, multi-way valve;

[0043] 510, processor; 520, communication interface; 530, memory; 540, communication bus. DETAILED DESCRIPTION

[0044] In order to make the objectives, technical solutions and advantages of the application clearer, the technical solutions in the application will be described clearly and completely below in combination with the drawings in the application. Obviously, the described embodiments are some embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative effort belong to the protection scope of the application.

[0045] In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0046] The following will be described in combination with Figure 1 The battery box temperature adjusting method provided by the present application is executed by hardware and / or software in the host computer of the working machine. As shown in the figure, the battery box temperature adjusting method of the present application at least includes the following steps: Figure 1

[0047] S101, obtaining the internal environment temperature T1 of the battery box 1 and the surface temperature T2 of the battery cell;

[0048] S102, when the internal environment temperature T1 of the battery box 1 is not in the optimal working temperature interval [T0 min , T0 max ] of the battery cell, controlling the whole vehicle thermal management module 2 to adjust the internal environment temperature of the battery box 1, so that the internal environment temperature of the battery box 1 is in the optimal working temperature interval [T0 min , T0 max ] of the battery cell;

[0049] S103, when the surface temperature T2 of the battery cell is not in the optimal working temperature interval [T0 min , T0 max ] of the battery cell, controlling the battery cell thermal management module 2 to adjust the surface temperature of the battery cell, so that the surface temperature of the battery cell is in the optimal working temperature interval [T0 min , T0 max ] of the battery cell;

[0050] In this embodiment, the optimal working temperature interval [T0 min , T0 max ] of the battery cell is usually set to 15-30℃, so as to ensure that the battery cell can be normally charged and discharged, and the performance of the battery cell is guaranteed. Other optimal working temperature intervals of the battery cell can also be set according to actual needs.

[0051] ​In S101, the battery box 1 internal environment temperature T1 and the cell surface temperature T2 are obtained, and the specific obtaining method can be measured by a temperature sensor, and the average value of multiple temperature values can also be obtained by multiple temperature sensors. Of course, the battery box internal environment temperature T1 and the cell surface temperature T2 can also be obtained by other temperature obtaining methods.

[0052] In S102, when the battery box 1 internal environment temperature T1 is not in the cell optimal working temperature interval [T0 min , T0 max ], the vehicle thermal management module 2 is controlled to adjust the battery box 1 internal environment temperature T1, so that the battery box 1 internal environment temperature T1 is in the cell optimal working temperature interval [T0 min , T0 max ]. Wherein, the vehicle thermal management module 2 is a structure in the vehicle itself, when the vehicle thermal management module is used to heat the battery box, the vehicle thermal management module is a heat source, for example, the motor, controller and the like in the vehicle. When the vehicle thermal management module 2 is used to cool the battery box 1, it can also be understood as a heat dissipation structure, such as heat exchanger, cooling fan, condenser and the like. In the present application, the vehicle thermal management module 2 in the prior art is applied to the temperature adjustment of the battery box, which can ensure that the cell is always in the optimal temperature interval of the environment temperature, and does not increase the cost.

[0053] In step S103, the cell thermal management module 5 can include a cell, a heating film and a liquid cooling plate, which is in contact with the cell. The cell thermal management module 5 is used to directly adjust the cell surface temperature. The cell surface temperature is adjusted by controlling the cell thermal management module 5, so that the cell surface temperature is in the cell optimal working interval. The cell is quickly heated or cooled by the cell thermal management module 5, so that the cell quickly reaches the optimal working temperature interval, and the use efficiency and cycle life of the cell are improved.

[0054] In an embodiment of the present application, it further comprises the steps of: when the battery box 1 internal environment temperature T1 is in the cell optimal working temperature interval [T0 min , T0 max ], the circulating heat preservation module 3 is controlled to work, and the circulating heat preservation module 3 is used to promote the flow of the heat conducting medium, so that the battery box 1 internal environment temperature T1 is always in the cell optimal working temperature interval [T0 min , T0 max ]. Wherein, when the battery box 1 internal environment temperature T1 is in the optimal working temperature interval [T0 min , T0 max ], it can be initially that the battery box 1 internal environment temperature T1 is less than T0 min, the battery box 1 is heated by the whole vehicle heat management module 2, so that the internal temperature of the battery box is increased to the optimal working temperature range; or the initial state is that the internal environment temperature T1 of the battery box 1 is greater than T0 max , the battery box 1 is cooled by the whole vehicle heat management module 2, so that the internal environment temperature T1 of the battery box 1 is reduced to the optimal working temperature range. Also, when the whole vehicle starts, the battery box 1 is in the optimal working temperature range, and then the circulating heat preservation module 3 starts to work to maintain the temperature in the box. The circulating heat preservation module 3 and the environment temperature control module 6 are used in cooperation, that is, the environment temperature control module 6 is arranged in the battery box 1, which can ensure that the battery box 1 maintains constant temperature, in addition, the circulating heat preservation module 3 can include a circulating pump, a heat conducting medium storage tank and a PTC heater, the environment temperature control module 6 includes a heat conducting pipe covering the battery box, the heat conducting pipe is provided with heat conducting medium, the circulating pump drives the medium to circulate, the PTC heater has constant temperature heating characteristics, so as to transfer the temperature to the heat conducting medium, thereby maintaining the temperature in the box, at this time, the battery cell is in a suitable environment temperature, which is beneficial to improve the use efficiency and cycle life of the battery. The heat conducting pipe is preferably made of copper pipe.

[0055] In an embodiment of the present application, in step S102, when it is determined that the internal environment temperature T1 of the battery box 1 is not in the optimal working temperature range [T0 min , T0 max ] of the battery cell, the whole vehicle heat management module 2 is controlled to adjust the internal environment temperature T1 of the battery box 1, including:

[0056] When it is determined that the internal environment temperature of the battery box 1 is less than T0 min , the whole vehicle heat source module 21 is controlled to increase the internal environment temperature of the battery box 1; wherein the whole vehicle heat management module 2 includes the whole vehicle heat source module 21, specifically, the whole vehicle heat source module 21 can be a heat generating component such as a motor and a controller, and the whole vehicle heat source module 21 can also be a heating component such as an air conditioner, as long as it can transfer heat with high temperature to the environment temperature control module 6.

[0057] In an embodiment of the present application, in step S103, when it is determined that the internal environment temperature T1 of the battery box 1 is not in the optimal working temperature range [T0 min , T0 max ] of the battery cell, the whole vehicle heat management module 2 is controlled to adjust the internal environment temperature of the battery box, including:

[0058] When it is determined that the internal environment temperature T1 of the battery box 1 is greater than T0 maxWhen the inside environment temperature of the battery box 1 is not in the optimal working temperature interval [T0 , T0

[0059] ] of the battery cell, the vehicle heat management module 2 is controlled to reduce the inside environment temperature of the battery box 1.

[0059] In the embodiment of the present application, in steps S102 and S103, when the inside environment temperature T1 of the battery box 1 is not in the optimal working temperature interval [T0 min , T0 max ] of the battery cell, and when the surface temperature T2 of the battery cell is not in the optimal working temperature interval [T0 min , T0 max ] of the battery cell, the inside environment temperature T1 of the battery box 1 is preferentially determined to be in the optimal working temperature interval [T0 min , T0 max ] of the battery cell. Since the battery cell is placed in the inside cavity of the battery box 1, the box body of the battery box 1 preferentially contacts the outside environment (in the CTC technology, the box body of the battery box is the chassis mechanism), when the outside environment temperature changes, the battery box 1 will first change in temperature due to the change in the environment temperature, when the inside environment temperature T1 of the battery box 1 is not in the optimal working temperature interval [T0 min , T0 max ] of the battery cell, the vehicle heat source module is started to heat the environment temperature control module, thereby increasing the inside environment temperature of the battery box, accelerating the response speed, so that the battery box is as soon as possible in the optimal working temperature interval [T0 min , T0 max ] of the battery cell, and the battery cell is as much as possible in the optimal working temperature interval [T0 min , T0 max ] of the battery cell.

[0060] In the embodiment of the present application, when the inside environment temperature T1 of the battery box 1 is less than T0 min , the following steps are included: when the inside environment temperature T1 of the battery box 1 is less than 0℃, the vehicle heat source module 21 and the battery cell heat management module 5 are controlled to be turned on; until the inside environment temperature T1 of the battery box 1 is in the optimal working temperature interval [T0 min , T0 max ] of the battery cell, the vehicle heat source module 21 is turned off; until the surface temperature T2 of the battery cell is in the optimal working temperature interval [T0 min , T0 max ] of the battery cell, the battery cell heat management module 5 is turned off.

[0061] Or when the vehicle is started for the first time at low temperature (less than 0 DEG C), the heat exchange is preferentially accessed to the vehicle heat source module 21, and the battery core heating module 5 is started to heat the battery core, when the internal environment temperature T1 of the battery box 1 is in the optimal working temperature interval [T0 min , T0 max ] of the battery core, the vehicle heat source module 21 is closed, and the circulating heat preservation module 3 is started; when the surface temperature T2 of the battery core is in the optimal working temperature interval [T0 min , T0 max ] of the battery core, the battery core heating module 5 is closed.

[0062] The battery box temperature adjusting method provided by the application can keep the battery core in the optimal working temperature interval [T0 min , T0 max ] all the time, increases the use efficiency and cycle life of the battery core, and compensates for the regional temperature difference by heating the environment temperature control module 6 through the vehicle heat source module 21 and heating the battery core through the battery core heating module 5.

[0063] The battery box temperature adjusting system provided by the application is described below, and the battery box temperature adjusting system described below can be correspondingly referred to the battery box temperature adjusting method described above. As shown in Figure 2 The battery box temperature adjusting device provided by the application at least comprises a temperature detection module 4, an environment temperature control module 6, a vehicle heat management module 2, a battery core heat management module 5 and a control module, the temperature detection module 4 is used for acquiring the internal environment temperature T1 of the battery box 1 and the surface temperature T2 of the battery core respectively, the environment temperature control module 6 is used for adjusting the internal environment temperature of the battery box 1, the vehicle heat management module 2 is connected with the environment temperature control module 6, and the vehicle heat management module 2 is used for adjusting the temperature of the environment temperature control module 6, the control module is electrically connected with the temperature detection module 4 and the vehicle heat management module 2, and the control module is used for controlling the opening or closing of the vehicle heat management module 2 and the battery core heat management module 5 according to the detection result of the temperature detection module 4.

[0064] The environment temperature control module 6 comprises a heat conduction pipe arranged in the battery box body, the environment temperature control module 6 is communicated with the vehicle heat management module 2, and the vehicle heat management module 2 can transmit heat or cold to the environment temperature control module 6, and it can be understood that the purpose is to make the temperature of the environment temperature control module 6 close to the temperature of the vehicle heat management module 2.

[0065] The battery box temperature control system provided by this invention acquires the internal ambient temperature of the battery box 1 through a temperature detection module 4, adjusts the internal ambient temperature of the battery box 1 through an ambient temperature control module 6, and heats or cools the ambient temperature control module 6 through a vehicle thermal management module 2. The control module, based on the detection results of the temperature detection module 4, controls the opening and closing of the vehicle heat dissipation module 22 and the cell thermal management module 5 to ensure that the battery box 1 is always within the optimal operating temperature range of the cells [T0]. min T0 max At ambient temperatures, this improves the efficiency and cycle life of the battery cells.

[0066] In one embodiment of the present invention, a multi-way valve 7 and a circulating insulation module 3 are also included. The multi-way valve 7 is electrically connected to a control module so that the control module can control the opening channel of the multi-way valve 7. The vehicle thermal management module 2, the circulating insulation module 3, and the ambient temperature control module 6 are respectively connected to one of the channels of the multi-way valve 7. The circulating insulation module 3 is used to keep the ambient temperature T1 inside the battery box constant.

[0067] Among them, such as Figure 3 As shown, the vehicle thermal management module 2 includes a vehicle heat source module 21 and a vehicle heat dissipation module 22. The vehicle heat source module 21 is connected to one of the ports of the multi-way valve 7. The vehicle heat source module 21 is used to heat the ambient temperature control module 6. The vehicle heat source module 21 may include heat-generating components such as motors and controllers, and may also include components that can generate heat, such as air conditioners. The vehicle heat dissipation module 22 is connected to the other port of the multi-way valve 7 and is used to cool the ambient temperature control module 6.

[0068] When the internal ambient temperature T1 of the battery box is lower than the minimum value T0 of the optimal temperature range of the battery cell... min At this time, the control module controls the multi-way valve 7 to connect with the ambient temperature control module 6, and also controls the vehicle heat source module 21 to connect with the multi-way valve 7. Meanwhile, the multi-way valve 7 is disconnected from the vehicle heat dissipation module 22 and the circulating insulation module 3. The vehicle heat source module 21 and the ambient temperature control module 6 are connected, and the heat generated by the vehicle heat source module 21 heats the heat pipe of the ambient temperature control module 6, raising the temperature inside the battery box until the battery box temperature reaches the optimal operating temperature range of the battery cells [T0]. min T0 max Until then. The control module disconnects the multi-way valve 7 from the ambient temperature control module 6 and the vehicle heat source module 21, and connects the multi-way valve to the circulating insulation module 3. The circulating insulation module 3 starts to work, and the heat transfer medium circulates in the heat transfer pipe to maintain the temperature inside the box.

[0069] When the real-time temperature of battery box 1 is higher than T0 of the optimal temperature range of the battery cell maxAt this time, the control module controls the multi-way valve 7 to connect with the vehicle cooling module 22 and the ambient temperature control module 6. Meanwhile, the multi-way valve 7 is disconnected from the vehicle heat source module 21 and the circulating insulation module 3. The vehicle cooling module 22 and the ambient temperature control module 6 are connected, and the vehicle cooling module 22 connects to the heat pipe of the ambient temperature control module 6 for cooling and heat exchange within the battery box. When the ambient temperature inside the battery box is within the optimal operating temperature range of the battery cells [T0], min T0 max When [T0], disconnect the vehicle cooling module 2 and connect the circulating insulation module 3. The circulating pump performs heat exchange inside the box to keep the temperature inside the box always within the optimal operating temperature range of the battery cells. min T0 max ].

[0070] like Figure 4 As shown, in one embodiment of the present invention, the temperature detection module 4 includes a first detection module 41 and a second detection module 42. The first detection module 41 is used to detect the ambient temperature T1 inside the battery box, and the second detection module 42 is used to detect the temperature T2 on the surface of the battery cell. The first detection module 41 and the second detection module 42 may include temperature sensors or other temperature acquisition units of different structural forms.

[0071] The working process of the battery box temperature control system provided by the present invention is as follows: the internal ambient temperature T1 of the battery box is obtained through the first detection module 41; when T1 is less than T0... min When the multi-way valve 7 opens, it connects to the vehicle's heat source module 21, and the heat generated by the motor, etc., heats the heat pipes inside the battery box, causing the temperature inside the box to rise; when the ambient temperature T1 inside the battery box is within the optimal operating temperature range of the battery cell [T0], min T0 max When the vehicle heat source module 21 is disconnected, the circulating insulation module 3 is started to circulate the heat inside the box and maintain the temperature inside the box.

[0072] The cell surface temperature T2 is obtained through the second detection module 42. When T2 is within the optimal operating temperature range of the cell [T0], the temperature is determined. min T0 max At this time, it is not necessary to use the cell thermal management module 5 to heat the cell to ensure that the cell is in a suitable ambient temperature. When T2 is less than T0 min At this time, the multi-way valve 7 opens and connects to the cell thermal management module 5, which heats the surface of the cell.

[0073] When the first detection module 41 obtains that the internal ambient temperature T1 of the battery box 1 is greater than T0 through temperature sensors distributed throughout the box, maxWhen the battery box 1 internal environment temperature T1 is in the interval [T0, T0], the multi-way valve 7 opens the access to the whole vehicle heat dissipation module 22, and the copper pipe refrigeration is accessed to the whole vehicle heat dissipation module 22 to exchange heat in the box, when the battery box 1 internal environment temperature T1 is in the interval [T0, T0], the whole vehicle heat dissipation module 22 is disconnected, and the circulating heat preservation module 3 is accessed to exchange heat in the box through the circulating pump to keep the battery box 1 internal environment temperature T1 in the interval [T0 min , T0 max ] of the best working temperature of the battery cell.

[0074] In addition, when the whole vehicle is started or charged at low temperature for the first time, the low temperature here can be understood as less than 0 DEG C, at this time, the whole vehicle heat source module 21 should be accessed to exchange heat, and the battery cell heat management module 5 is started to heat the battery cell, when the battery box 1 internal environment temperature T1 is in the interval [T0 min , T0 max ] of the best working temperature of the battery cell, the whole vehicle heat source module 21 is closed; when the surface temperature T2 of the battery cell is in the interval T0 of the best working temperature, the battery cell heat management module 5 is closed, and the circulating heat preservation module 3 is started.

[0075] The application can make the battery cell in the best temperature interval, increase the use efficiency and cycle life of the battery cell, and the whole vehicle heat source module 21 and the battery cell heat management module 5 are used to heat the battery box 1 at the same time, and the temperature difference of the region is compensated.

[0076] Another aspect of the application also provides a working machine comprising the battery box temperature regulating system.

[0077] The working machine provided by the embodiment of the application does not constitute limitation on the type of the working machine, for example, the working machine can be an electric excavator, an electric crane, an electric loader and the like.

[0078] The working machine provided by the embodiment of the application comprises the battery box temperature regulating system, so that the battery cell can be in the best temperature interval, the use efficiency and cycle life of the battery cell are improved, and the temperature solution for the CTC and CTP large integrated battery can well regulate the temperature of the battery box and compensate the temperature difference of the region through the whole vehicle heat source module 21 and the battery cell heat management module 5.

[0079] Figure 5 An example of an electronic device is shown in the physical structure diagram, Figure 5As shown, the electronic device can include a processor 510, a communications interface 520, a memory 530, and a communications bus 540, wherein the processor 510, the communications interface 520, and the memory 530 complete mutual communication through the communications bus 540. The processor 510 can invoke a logical instruction in the memory 530 to execute a battery box temperature adjustment method, which includes:

[0080] Obtaining an internal environment temperature T1 of the battery box and a cell surface temperature T2;

[0081] Determining that the internal environment temperature T1 of the battery box is not in the cell optimal working temperature interval [T0 min , T0 max ], controlling a whole vehicle thermal management module to adjust the internal environment temperature of the battery box, so that the internal environment temperature of the battery box is in the cell optimal working temperature interval [T0 min , T0 max ];

[0082] Determining that the cell surface temperature T2 is not in the cell optimal working temperature interval [T0 min , T0 max ], controlling a cell thermal management module to adjust the cell surface temperature, so that the cell surface temperature is in the cell optimal working temperature interval [T0 min , T0 max ].

[0083] In addition, the logical instruction in the memory 530 described above can be realized in the form of a software function unit and sold or used as an independent product, and can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or the part that contributes to the prior art or part of the technical solutions can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a plurality of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in the various embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various program code storage media.

[0084] In another aspect, the present application also provides a computer program product, which comprises a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions which, when executed by a computer, enable the computer to perform the battery case temperature adjustment method provided by any of the above methods, the method comprising:

[0085] obtaining an internal environment temperature T1 of the battery case and a cell surface temperature T2;

[0086] determining that the internal environment temperature T1 of the battery case is not in the optimal working temperature interval [T0 min , T0 max ] of the cell, and controlling a vehicle thermal management module to adjust the internal environment temperature of the battery case so that the internal environment temperature of the battery case is in the optimal working temperature interval [T0 min , T0 max ] of the cell;

[0087] determining that the cell surface temperature T2 is not in the optimal working temperature interval [T0 min , T0 max ] of the cell, and controlling a cell thermal management module to adjust the cell surface temperature so that the cell surface temperature is in the optimal working temperature interval [T0 min , T0 max ] of the cell.

[0088] In yet another aspect, the present application also provides a non-transitory computer-readable storage medium having a computer program stored thereon, the computer program being executed by a processor to implement the battery case temperature adjustment method provided by any of the above methods, the method comprising:

[0089] obtaining an internal environment temperature T1 of the battery case and a cell surface temperature T2;

[0090] determining that the internal environment temperature T1 of the battery case is not in the optimal working temperature interval [T0 min , T0 max ] of the cell, and controlling a vehicle thermal management module to adjust the internal environment temperature of the battery case so that the internal environment temperature of the battery case is in the optimal working temperature interval [T0 min , T0 max ] of the cell;

[0091] determining that the cell surface temperature T2 is not in the optimal working temperature interval [T0 min , T0 max ] of the cell, and controlling a cell thermal management module to adjust the cell surface temperature so that the cell surface temperature is in the optimal working temperature interval [T0 min , T0 max ] of the cell.

[0092] The device embodiments described above are merely illustrative, wherein the units described as separate components can or can not be physically separate, and the components displayed as units can or can not be physical units, i.e., can be located in one place or distributed on multiple network units. Part or all of the modules can be selected to achieve the purposes of the embodiments according to actual needs. Those skilled in the art can understand and implement without creative labor.

[0093] Through the description of the above embodiments, those skilled in the art can clearly understand that the embodiments can be realized by means of software and necessary universal hardware platforms, and of course can also be realized by hardware. Based on such understanding, the above technical solutions can be embodied in the form of software products, and the computer software products can be stored in a computer readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and include a plurality of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute the methods described in each embodiment or some parts of the embodiments.

[0094] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0095] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "way", "specific way", or "some ways" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or way are included in at least one embodiment or way of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or way. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate way in any one or more embodiments or ways. In addition, those skilled in the art can combine and combine the different embodiments or features of different embodiments or ways described in the present application without contradiction.

[0096] It should be pointed out finally that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit the same; and although the present application has been described in detail with reference to the foregoing embodiments, it should be appreciated by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features thereof can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery box temperature regulation method, applied to a battery system employing CTP or CTC technology, characterized in that, Including the following steps: S101. Obtain the internal ambient temperature T1 of the battery box and the surface temperature T2 of the battery cell; S102, Determine that the internal ambient temperature T1 of the battery box is not within the optimal operating temperature range of the battery cells [T0] min T0 max When [T0], the vehicle thermal management module adjusts the internal ambient temperature of the battery pack to ensure that the internal ambient temperature of the battery pack is within the optimal operating temperature range of the battery cells. min T0 max ]; S103, Determine that the cell surface temperature T2 is not within the optimal operating temperature range of the cell [T0] min T0 max When [T0], the control cell thermal management module adjusts the cell surface temperature to keep it within the cell's optimal operating temperature range. min T0 max ]; S104. Determine that the internal ambient temperature T1 of the battery box is within the optimal operating temperature range of the battery cell [T0]. min， T0 max When [T0], the circulating heat preservation module is activated. This module promotes the flow of the heat transfer medium to ensure that the internal ambient temperature of the battery box remains within the optimal operating temperature range of the battery cell. min， T0 max ]Inside.

2. The battery box temperature regulation method according to claim 1, characterized in that, The internal ambient temperature T1 of the battery box is determined to be outside the optimal operating temperature range of the battery cells [T0]. min， T0 max When [the vehicle's thermal management module is activated], it regulates the internal ambient temperature of the battery pack, including: The internal ambient temperature of the battery box is determined to be less than T0. min At the same time, the vehicle thermal management module controls the vehicle heat source module to raise the internal ambient temperature of the battery box; wherein, the vehicle thermal management module includes the vehicle heat source module.

3. The battery box temperature regulation method according to claim 1, characterized in that, The internal ambient temperature T1 of the battery box is determined to be outside the optimal operating temperature range of the battery cells [T0]. min， T0 max When [the vehicle's thermal management module is activated], it regulates the internal ambient temperature of the battery pack, including: The internal ambient temperature of the battery box is determined to be greater than T0. max At the same time, the vehicle thermal management module controls the vehicle cooling module to reduce the internal ambient temperature of the battery box; wherein, the vehicle thermal management module includes the vehicle cooling module.

4. The battery box temperature regulation method according to claim 1, characterized in that, The internal ambient temperature T1 of the battery box is determined to be outside the optimal operating temperature range of the battery cells [T0]. min， T0 max When, and when it is determined that the cell surface temperature T2 is not within the cell's optimal operating temperature range [T0], min， T0 max When, it includes: First, determine whether the internal ambient temperature T1 of the battery box is within the optimal operating temperature range of the battery cell [T0]. min， T0 max ].

5. The battery box temperature regulation method according to claim 2, characterized in that, The internal ambient temperature T1 of the battery box is determined to be less than T0. min At that time, including: When the internal ambient temperature T1 of the battery box is determined to be less than 0°C, the vehicle heat source module and the cell thermal management module are turned on.

6. A battery box temperature control system, characterized in that, To implement the method of any one of claims 1-5, comprising: The temperature detection module is used to acquire the ambient temperature T1 inside the battery box and the surface temperature T2 of the battery cell, respectively. An ambient temperature control module is used to adjust the internal ambient temperature of the battery box; A vehicle thermal management module is connected to the ambient temperature control module, and the vehicle thermal management module is used to adjust the temperature of the ambient temperature control module. The cell thermal management module is used to regulate the temperature of the cell surface; The control module is electrically connected to both the temperature detection module and the vehicle heat dissipation module; the control module is used to control the opening or closing of the vehicle thermal management module and the battery cell thermal management module based on the detection results of the temperature detection module. The control module is also used to determine whether the internal ambient temperature T1 of the battery box is within the optimal operating temperature range of the battery cell [T0]. min， T0 max When [T0], the circulating heat preservation module is activated. This module promotes the flow of the heat transfer medium to ensure that the internal ambient temperature of the battery box remains within the optimal operating temperature range of the battery cell. min， T0 max ]Inside.

7. The battery box temperature control system according to claim 6, characterized in that, It also includes a multi-way valve and a circulating insulation module. The multi-way valve is electrically connected to the control module, and the vehicle thermal management module, the circulating insulation module, and the ambient temperature control module are each connected to one of the multi-way valves. The circulating insulation module is used to keep the ambient temperature T1 inside the battery box constant.

8. The battery box temperature control system according to claim 7, characterized in that, The vehicle thermal management module includes: The vehicle heat source module is connected to one of the channels of the multi-way valve; the vehicle heat source module is used to heat the ambient temperature control module. The vehicle cooling module is connected to another path of the multi-way valve; and the vehicle cooling module is used to cool the ambient temperature control module.

9. A type of operating machinery, characterized in that, Includes the battery box temperature control system as described in any one of claims 6-8.

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