Heat recovery method and related apparatus

Abstract

The application provides a heat recovery method and related device, which are applied to a battery system. The battery system comprises a battery unit, a control unit, a sensor unit, a switching unit, a switching unit and N heat recovery units. The method comprises the following steps: obtaining a first temperature value detected by the sensor unit; determining a temperature grade corresponding to the first temperature value, wherein the control unit is provided with multiple temperature grades; calling the switching unit to control the switching state of the switching unit according to the temperature grade, so as to adjust the connection state of M heat recovery units in the N heat recovery units and the battery unit, wherein M is a positive integer less than or equal to N; and recovering heat from the battery unit according to the M heat recovery units.

Description

Technical Field

[0001] This application belongs to the field of energy recovery and utilization technology, specifically relating to a heat recovery method and related apparatus. Background Technology

[0002] Currently, in existing immersion power systems, heat is recovered from the battery via coolant, which is then piped to a heat recovery unit for further processing. The cooled coolant is then piped back to the battery immersion area to complete the heat recovery process. This method cannot control the rate of heat recovery and can only meet a single heat exchange requirement. Summary of the Invention

[0003] This application provides a heat recovery method and related apparatus to adapt to different heat recovery scenarios.

[0004] In a first aspect, this application provides a heat recovery method applied to a control unit in a battery system, the battery system including a battery cell, the control unit, a sensor unit, a switching unit, a switch unit, and N heat recovery units, where N is a positive integer greater than or equal to 2; the method includes:

[0005] The sensor unit detects the first temperature value of the battery cell;

[0006] The temperature level corresponding to the first temperature value is determined. The control unit is set with multiple temperature levels, and each temperature level includes a temperature range.

[0007] According to the temperature level, the switching unit is invoked to control the switching state of the switching unit, so as to adjust the connection state of M heat recovery units among the N heat recovery units with the battery unit, where M is a positive integer less than or equal to N;

[0008] Heat is recovered from the battery cell using the M heat recovery units.

[0009] Secondly, this application provides a heat recovery control device applied in a battery system. The battery system includes a battery cell, a heat recovery control device, a sensor unit, a switching unit, a switch unit, and N heat recovery units, where N is a positive integer greater than or equal to 2. The heat recovery control device includes:

[0010] An acquisition unit is used to acquire the temperature value obtained by the sensor unit from the battery unit;

[0011] A determining unit is configured to determine the temperature level corresponding to the temperature value, wherein the control unit is configured with multiple temperature levels, and each temperature level includes a temperature range; and to determine a heat recovery strategy based on the temperature level.

[0012] The processing unit is used to call the switching unit to control the switching state of the switching unit according to the heat recovery strategy, so as to adjust the connection state of M heat recovery units among the N heat recovery units and the battery unit, where M is a positive integer less than or equal to N;

[0013] A heat recovery unit is used to recover heat from the battery cell according to the M heat recovery units.

[0014] Thirdly, this application provides an electronic device including a processor, a memory, a communication interface, and one or more programs, said one or more programs being stored in the memory and configured to be executed by the processor, said programs including instructions for performing the steps of any one of the first to third aspects of this application.

[0015] Fourthly, this application provides a computer storage medium storing a computer program for electronic data interchange, wherein the computer program causes a computer to perform some or all of the steps described in any one of the first to third aspects of this application. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1a This is a schematic diagram of a battery system architecture provided in an embodiment of this application;

[0018] Figure 1b This is a schematic diagram of a specific battery system structure provided in an embodiment of this application;

[0019] Figure 1c This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application;

[0020] Figure 2 This is a schematic flowchart of a heat recovery method provided in an embodiment of this application;

[0021] Figure 3 This is a schematic diagram of a process for adjusting a heat recovery unit according to a temperature level, provided in an embodiment of this application.

[0022] Figure 4 This is a schematic flowchart of a series heat recovery method provided in an embodiment of this application;

[0023] Figure 5 This is a schematic flowchart of a parallel heat recovery method provided in an embodiment of this application;

[0024] Figure 6 This is a schematic diagram of a heat recovery control device provided in an embodiment of this application. Detailed Implementation

[0025] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0026] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, systems, products, or apparatuses.

[0027] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0028] The following is a brief introduction to the relevant terminology used in this application.

[0029] Currently, existing technologies only use fixed heat recovery systems, which can only adapt to heat recovery under specific conditions. When the heat recovery system operates under unsuitable conditions, the recovery efficiency will decrease, and it may even lead to untimely heat recovery, causing the system to fail, or the energy consumed in heat recovery will be greater than the energy recovered.

[0030] To address the aforementioned issues, this application provides a heat recovery method applied to a control unit in a battery system. The battery system includes a battery cell, the control unit, a sensor unit, a switching unit, a switch unit, and N heat recovery units. This heat recovery method can be applied to scenarios where the appropriate heat recovery unit is switched based on a temperature value within the battery system. The control unit first obtains a first temperature value detected by the sensor unit from the battery cell; determines the temperature level corresponding to the first temperature value; the control unit has multiple temperature levels, each including a temperature range; based on the temperature level, the switching unit controls the switching state of the switch unit to adjust the connection state of M heat recovery units among the N heat recovery units with the battery cell, where M is a positive integer less than or equal to N; and heat recovery is performed on the battery cell based on the M heat recovery units. This allows for the selection of different heat recovery units for heat recovery based on different temperature ranges, improving heat recovery efficiency and increasing the equipment utilization rate of the recovery system. This solution is applicable to various scenarios, including but not limited to the aforementioned application scenarios.

[0031] The system architecture involved in the embodiments of this application is described below.

[0032] This application provides a battery system 100, please refer to... Figure 1a The battery system 100 includes a battery unit 110, a control unit 120, a sensor unit 130, a switching unit 140, a switch unit 150, and N heat recovery units 160, where N is a positive integer greater than or equal to 2. Specifically, the control unit 120 is used to perform the following operations: acquire a first temperature value detected by the sensor unit 130 of the battery unit 110; determine the temperature level corresponding to the first temperature value, wherein the control unit 120 has multiple temperature levels, each temperature level including a temperature range; according to the temperature level, invoke the switching unit 140 to control the switching state of the switch unit 150 to adjust the connection state of M heat recovery units 160 among the N heat recovery units 160 with the battery unit 110, where M is a positive integer less than or equal to N; and perform heat recovery on the battery unit 110 according to the M heat recovery units 160.

[0033] Please refer to the details. Figure 1bThe plurality of switches includes a first switch 151, a second switch 152, a third switch 153, a fourth switch 154, a fifth switch 155, and a sixth switch 156. In one embodiment of the N heat recovery units 160, heat recovery units 161, 162, and 163 are included. The control unit 120 outputs a corresponding switching signal to the switching unit 140 according to a first temperature level. The switching unit 140 then controls the switching states of the corresponding switches among the first switch 151, second switch 152, third switch 153, fourth switch 154, fifth switch 155, and sixth switch 156, thereby forming a heat recovery loop between the battery unit 110 and the heat recovery units 160 to recover heat from battery waste liquid according to a specific combination. Specifically, the battery unit 110 can be described as an immersed battery, dissipating heat through a coolant; the N heat recovery units 160 can include at least one of a heat exchanger unit, a heat pipe unit, and a heat pump unit.

[0034] This application also provides an electronic device 10, such as... Figure 1c As shown, it includes at least one processor 11, a display screen 12, and a memory 13, and may also include a communications interface 15 and a bus 14. The processor 11, display screen 12, memory 13, and communications interface 15 can communicate with each other via the bus 14. The display screen 12 is configured to display a preset user guide interface in the initial setup mode. The communications interface 15 can transmit information. The processor 11 can call logical instructions in the memory 13 to execute the methods described in the above embodiments.

[0035] Optionally, the electronic device 10 may be a mobile electronic device, an electronic device or other device, and is not limited to a single type.

[0036] Furthermore, the logic instructions in the aforementioned memory 13 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium.

[0037] The memory 13, as a computer-readable storage medium, can be configured to store software programs, computer-executable programs, such as program instructions or modules corresponding to the methods in the embodiments of this disclosure. The processor 11 executes functional applications and data processing by running the software programs, instructions, or modules stored in the memory 13, thereby implementing the methods in the above embodiments.

[0038] The memory 13 may include a program storage area and a data storage area. The program storage area may store the operating system and application programs required for at least one function; the data storage area may store data created based on the use of the electronic device 10. Furthermore, the memory 13 may include high-speed random access memory (RAM) and may also include non-volatile memory. For example, various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks, may be used, or they may be transient storage media.

[0039] The specific methods will be described in detail below.

[0040] Please see Figure 2 This application also provides a heat recovery method applied in a control unit of the aforementioned battery system, the method comprising:

[0041] Step 201: Obtain the first temperature value obtained by the sensor unit through detecting the battery unit.

[0042] In a specific implementation, when the battery cell starts working, the sensor unit detects the battery cell to obtain the first temperature value of the battery cell.

[0043] Step 202: Determine the temperature level corresponding to the first temperature value.

[0044] The control unit is equipped with multiple temperature levels, and each temperature level includes a temperature range.

[0045] In a specific implementation, the control unit stores a lookup table that corresponds one-to-one with multiple temperature ranges and temperature levels. When the first temperature value is detected, the control unit queries the lookup table based on the first temperature value to obtain the temperature level corresponding to the first temperature value.

[0046] Step 203: According to the temperature level, call the switching unit to control the switching state of the switching unit, so as to adjust the connection state between M heat recovery units among the N heat recovery units and the battery unit.

[0047] Where M is a positive integer less than or equal to N.

[0048] In practice, a corresponding heat recovery adjustment strategy is first determined based on the temperature level. Then, the switching unit is invoked to control the switching state of the switching unit according to the heat recovery adjustment strategy, so as to adjust the connection state between M heat recovery units out of the N heat recovery units and the battery unit.

[0049] Step 204: Determine the heating rate of the battery cell.

[0050] In the specific implementation, the first temperature value is used as the initial value. The temperature value detected by the sensor is obtained at preset time intervals. When multiple temperature values ​​are obtained, the temperature rise value between each two adjacent temperature values ​​is calculated to obtain multiple temperature rise values. The average temperature rise value of the multiple temperature rise values ​​is calculated to obtain the temperature rise rate at each preset time interval.

[0051] Step 205: Predict whether the temperature level will change based on the heating rate.

[0052] The time required to change from the temperature level corresponding to the first temperature value to other temperature levels is calculated based on the heating rate. The temperature level change node is determined based on this time. For example, there are 3 temperature levels: the temperature range of temperature level 1 is 0℃-50℃, the temperature range of temperature level 2 is 51℃-100℃, and the temperature range of temperature level 3 is 101℃-200℃. The current temperature level is 2 and the temperature is 110℃. If the current heating rate is -10℃ / min, it will be downgraded to temperature level 1 after 1 minute. Therefore, the temperature level change node is set after 1 minute. If the current heating rate for aluminum plating is 10℃ / min, it will be upgraded to temperature level 3 after 9 minutes. Therefore, the temperature level change node is set after 9 minutes.

[0053] Step 206: When a change in the temperature level is predicted, determine the corresponding heat recovery adjustment strategy based on the predicted temperature level.

[0054] The heat recovery adjustment strategy refers to the adjustment strategy for the N heat recovery units determined based on the predicted temperature level.

[0055] In practice, based on the temperature level to be changed at the temperature level change node, adjustment strategies for the N heat recovery units are pre-configured, generating corresponding heat recovery adjustment strategies. Continuing with the example above, if the current temperature level is 2 and the temperature level change node corresponds to temperature level 1, then K heat recovery units that meet the heat recovery requirements for temperature level 1 are identified from the N heat recovery units. Control strategies are configured for these K heat recovery units, and then the heat recovery adjustment strategies are saved. One minute later, these heat recovery adjustment strategies are invoked to adjust the K heat recovery units.

[0056] Step 207: According to the heat recovery adjustment strategy, the switching unit is invoked to control the switching state of the switching unit.

[0057] In practice, when the time corresponding to the temperature level change node is reached, the heat recovery adjustment strategy is invoked to adjust the K heat recovery units, and the corresponding switching signal is output to the switching unit. The switching unit controls the switching state of the switching unit according to the switching signal to meet the heat recovery requirements of temperature level 1.

[0058] Furthermore, if the time since the temperature level change node is greater than a preset value, the current second temperature value is detected before the heat recovery adjustment strategy is invoked. If the second temperature value is within the temperature level corresponding to the temperature level change node, the heat recovery adjustment strategy is invoked; otherwise, a new heat recovery adjustment strategy is determined based on the second temperature value to invoke the switching unit to control the switching state of the switching unit.

[0059] In one possible embodiment, please refer to Figure 3 The switching unit includes multiple switches; the step of calling the switching unit to control the switching state of the switching unit according to the temperature level, so as to adjust the connection state between M of the N heat recovery units and the battery unit, includes:

[0060] Step 2031: Determine whether the first temperature value belongs to the first temperature level; Step 2032: If the first temperature value belongs to the first temperature level, output a first switching signal to the switching unit. The first switching signal is used to control the switching unit to output M first switching signals. The M first switching signals are used to control the first switching state of the multiple switches to change the M heat recovery units and the battery unit to a first connection state. The first connection state means that the M heat recovery units are connected to the battery unit in series.

[0061] Specifically, based on Figure 1a The heat recovery unit in the middle provides one implementation method; please refer to [link / reference]. Figure 4The first switching signal includes a first switching sub-signal; the first temperature level includes a fourth temperature level and a fifth temperature level; the first heat recovery strategy includes a fourth heat recovery strategy and a fifth heat recovery strategy; the fourth temperature level corresponds to the fourth heat recovery strategy; the fifth temperature level corresponds to the fifth heat recovery strategy; the plurality of switches includes a first switch, a second switch, a third switch, a fourth switch, and a fifth switch; the N heat recovery units include a heat pump unit, a heat exchanger unit, and a heat pipe unit; the step of outputting a first switching signal to the switching unit if the first temperature value belongs to the first temperature level includes: step 20311, determining whether the first temperature value belongs to the first temperature level; step 20321, if the first temperature value belongs to the first temperature level, outputting a first switching sub-signal to the switching unit, the first switching sub-signal being used to control the switching unit to output second switching signals to the first switch, the second switch, the third switch, the fourth switch, and the fifth switch respectively, so as to control the battery unit, the first switch, the heat exchanger unit, the second switch, the heat pipe unit, the third switch, the heat pump unit, the fourth switch, the fifth switch, and the battery unit to be connected sequentially.

[0062] In specific implementation, after determining the temperature level of the first temperature value, when the first temperature value belongs to the first temperature level, a first switching signal is output to the switching unit. Then, the switching unit outputs a second switching signal to the corresponding first, second, third, fourth, and fifth switches to control the first, second, third, fourth, and fifth switches to conduct in the direction indicated by the second switching signal. Ultimately, this causes the battery unit, the first switch, the heat exchanger unit, the second switch, the heat pipe unit, the third switch, the heat pump unit, and the fourth switch to be connected. The fifth switch and the battery unit are connected in sequence to form a heat recovery circulation path, so that the waste liquid in the battery unit can pass through the heat exchanger unit, the heat pipe unit and the heat pump unit in sequence. The heat exchanger unit performs heat exchange when the waste liquid temperature is high to initially recover some of the heat in the waste liquid. Then, the waste liquid with the initial reduced temperature is output to the heat pipe unit for secondary heat recovery. At this time, the temperature of the waste liquid will become relatively low, for example, it will become warm water of 30-40 degrees. At this time, low-temperature heat recovery can be performed through the heat pump unit. Finally, the cooled liquid is transferred back to the battery unit to continue to absorb the heat generated by the battery and carry out the next heat recovery cycle.

[0063] Furthermore, the heat exchanger unit may include multiple heat exchangers, the heat pipe unit may include multiple heat pipes, and the heat pump unit may include multiple heat pumps. When the waste liquid temperature is too high, a single heat exchanger may not be able to lower the temperature to the temperature at which the heat pipes and heat pumps can operate most efficiently within the time it takes for the waste liquid to flow through the heat exchanger. Therefore, multiple heat exchangers can be connected to lower the temperature of the waste liquid to a preset value before outputting it to the heat pipe unit and heat pump unit. Similarly, multiple heat pipes and heat pumps can be connected for corresponding processing to meet the recovery requirements. It is understood that the specific number of heat exchangers, heat pipes, and heat pumps connected can be predicted based on the historical processing data of these heat recovery units. Specifically, the amount of heat that each heat exchanger, heat pipe, and heat pump can recover at different temperatures is determined, and then the number of heat recovery devices (referring to individual devices in each heat recovery unit, such as a single heat exchanger, heat pipe, and heat pump) required to lower the temperature level from the current temperature value to the temperature level at which the next heat recovery unit can perform efficient heat recovery is calculated. For example, if the initial waste liquid temperature is temperature level 1, the heat exchanger unit first recovers heat from the waste liquid. The heat pipe unit reaches its maximum efficiency at temperature level 3. Therefore, the amount of heat that a single heat exchanger unit can recover at temperature level 1 is calculated to obtain waste liquid at temperature level 2. To reduce the temperature from level 2 to level 3, two more heat exchangers are needed, so it is determined that three cascaded heat exchangers will be connected. The heat pump unit reaches its maximum efficiency at temperature level 5. Therefore, the number of heat pipes needed to reduce the temperature from level 3 to level 5 is calculated, and the number of heat pipes to be connected is determined. Finally, the number of heat pumps needed to reduce the temperature to the target temperature is determined. The first switching signal to be output is then determined based on the number of heat exchangers, heat pipes, and heat pumps to be connected.

[0064] As can be seen, in this embodiment, the high-temperature waste liquid is recovered step by step with a temperature gradient by cascading the heat exchanger unit, heat pipe unit and heat pump unit, which gives full play to the characteristics of different heat recovery units and thus improves the heat recovery efficiency.

[0065] For further information, please refer to [link / reference]. Figure 3 Step 2033: Determine whether the first temperature value belongs to the second temperature level; Step 2034: If the first temperature value belongs to the second temperature level, output a second switching signal to the switching unit. The second switching signal is used to control the switching unit to output M second switching signals. The M second switching signals are used to control the second switching state of the multiple switches to change the M heat recovery units and the battery unit to a second connection state. The second connection state means that the M heat recovery units are connected to the battery unit in parallel. For details, please refer to [link to details]. Figure 5The second switching signal includes a second switching sub-signal. The N heat recovery units include a heat pump unit, a heat exchanger unit, and a heat pipe unit. The plurality of switches include a first switch and a sixth switch. The first switch is connected to the battery unit. If the first temperature value belongs to the second temperature level, the second switching signal is output to the switching unit, including: step 20331, determining whether the first temperature value belongs to the second temperature level; step 20341, if the first temperature value belongs to the second temperature level, the second switching sub-signal is output to the switching unit. The second switching sub-signal is used to control the switching unit to output a second switching signal to the first switch and the sixth switch respectively, so as to control the first switch to be connected to the sixth switch, and to control the sixth switch to be connected to the heat pump unit, the heat exchanger unit, or the heat pipe unit.

[0066] Specifically, based on Figure 1a The heat recovery unit in the middle provides an implementation method, wherein the heat pump unit includes multiple cascaded heat pump devices; if the first temperature value belongs to the second temperature level, a second switching signal is output to the switching unit, the second switching signal is used to control the switching unit to output a sixth switching signal to the first switch and the sixth switch respectively, so as to control the first switch and the sixth switch to connect, and control the multiple cascaded heat pump devices to recover the heat generated by the battery unit step by step.

[0067] In practice, while a single heat recovery unit may not be able to reduce a large amount of waste liquid to the target temperature, reducing the volume of waste liquid can decrease the total amount of heat generated. In this case, a single heat recovery device can directly reduce the waste liquid to the target temperature. For example, by connecting multiple heat exchangers in parallel, the waste liquid can be distributed among multiple heat exchangers, thereby reducing the waste liquid to the target temperature in one go. This also achieves the goal of improving heat recovery efficiency.

[0068] In addition, multiple cascaded heat exchanger combinations can be connected in parallel. Each heat exchanger combination includes a heat exchanger, a heat pipe, and a heat pump. The total first heat value that each heat exchanger combination can recover is calculated in the same way as above. Then, the total second heat value per unit time is calculated based on the hot liquid flow rate, waste liquid temperature, and waste liquid specific heat capacity. Finally, the total second heat value is divided by the total first heat value to obtain the number of heat exchanger combinations (rounded up).

[0069] As can be seen, in this embodiment, the heat in the waste liquid is recovered quickly through parallel connection, which improves the speed of heat recovery and thus improves the efficiency of heat recovery.

[0070] In one possible embodiment, the method further includes: acquiring M corresponding temperature change values ​​obtained by the sensor unit from detecting the M heat recovery units within a first preset time period; determining whether a first heat recovery unit exists among the M heat recovery units based on the M temperature change values, wherein the first heat recovery unit refers to a heat recovery unit that has failed; if the first heat recovery unit exists, determining a second heat recovery unit from the N heat recovery units; and sending a third switching signal to the switching unit to replace the first heat recovery unit with the second heat recovery unit.

[0071] In practice, a sensor unit detects each of the M heat recovery units, identifying a temperature change value for each unit. If the temperature change value of a particular heat recovery unit is abnormal, it indicates a malfunction, and the abnormal heat recovery unit is identified as the first heat recovery unit. Then, it is determined whether a second heat recovery unit of the same type as the first heat recovery unit exists. If so, a third switching signal is sent to the switching unit to connect the second heat recovery unit to the current heat exchange system. The first heat recovery unit is then disconnected, replacing it with the second heat recovery unit.

[0072] As can be seen, in this embodiment, when a heat recovery unit is determined to be faulty, it is replaced with a heat recovery unit of the same type, which improves the reliability of the battery system.

[0073] In one possible embodiment, the method further includes: acquiring multiple first temperature values ​​within a second preset time period, starting from the start of operation of the battery cell; determining the heating rate of the battery cell based on the multiple first temperature values ​​and the second preset time period; invoking the switching unit to control the switching state of the switching unit based on the heating rate, so as to adjust the number of heat recovery units participating in heat recovery among the N heat recovery units, and the connection state between the adjusted heat recovery units and the battery cell; and performing heat recovery on the battery cell based on the adjusted heat recovery units.

[0074] In practice, the heat recovery unit combination is adjusted based on the detected heating rate of the battery cells, ensuring that the heat recovery units consistently achieve the highest achievable efficiency. For example, if the heating rate increases, more heat recovery units are needed. First, the most efficient combination of heat recovery units is calculated using the method described above. Then, the required additional units are determined, and the switching unit adjusts the connection state of the switching unit to complete the adjustment. Similarly, if the heating rate decreases, the number of heat recovery units is reduced in the same way.

[0075] As can be seen, in this embodiment, adjusting the number and connection method of the heat recovery units according to the heating rate ensures a high heat recovery efficiency.

[0076] In summary, in this application, the control unit first acquires the first temperature value detected by the sensor unit from the battery unit; determines the temperature level corresponding to the first temperature value, and the control unit is configured with multiple temperature levels, each temperature level including a temperature range; based on the temperature level, the switching unit is invoked to control the switching state of the switching unit to adjust the connection state between M of the N heat recovery units and the battery unit, where M is a positive integer less than or equal to N; and heat recovery is performed on the battery unit based on the M heat recovery units. In this way, different heat recovery units can be selected for heat recovery according to different temperature ranges, thereby improving heat recovery efficiency and increasing the equipment utilization rate of the recovery system.

[0077] The above primarily describes the solutions of the embodiments of this application from the perspective of the method execution process. It is understood that, in order to achieve the above functions, mobile electronic devices include corresponding hardware structures and / or software modules for executing each function. Those skilled in the art should readily recognize that, in conjunction with the units and algorithm steps of the various examples described in the embodiments provided herein, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed by hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0078] This application embodiment can divide the electronic device into functional units according to the above method example. For example, each function can be divided into a separate functional unit, or two or more functions can be integrated into one processing unit. The integrated unit can be implemented in hardware or as a software functional unit. It should be noted that the unit division in this application embodiment is illustrative and only represents one logical functional division. In actual implementation, there may be other division methods.

[0079] Please see Figure 6 This application also provides a heat recovery control device 30, applied to a control unit in a battery system. The battery system includes a battery cell, a control unit, a sensor unit, a switching unit, a switch unit, and N heat recovery units, where N is a positive integer greater than or equal to 2. The control unit includes:

[0080] Acquisition unit 31 is used to acquire the temperature value obtained by the sensor unit from the battery unit;

[0081] The determining unit 32 is used to determine the temperature level corresponding to the temperature value, the control unit is provided with multiple temperature levels, and a single temperature level includes a temperature range; and to determine a heat recovery strategy based on the temperature level.

[0082] Processing unit 33 is used to call the switching unit to control the switching state of the switching unit according to the heat recovery strategy, so as to adjust the connection state of M heat recovery units among the N heat recovery units and the battery unit, where M is a positive integer less than or equal to N;

[0083] The determining unit 32 is also used to determine the heating rate of the battery cell;

[0084] Prediction unit 34 is used to predict whether the temperature level will change based on the heating rate;

[0085] The determining unit 32 is further configured to determine a corresponding heat recovery adjustment strategy based on the predicted temperature level when the temperature level is predicted to change, wherein the heat recovery adjustment strategy refers to the adjustment strategy for the N heat recovery units determined based on the predicted temperature level.

[0086] Calling unit 35 is used to call the switching unit to control the switching state of the switching unit according to the heat recovery adjustment strategy.

[0087] In one possible embodiment, the switching unit includes multiple switches; the aspect of calling the switching unit to control the switching state of the switching unit according to the temperature level to adjust the connection state of M heat recovery units among the N heat recovery units with the battery unit is specifically configured as follows: if the first temperature value belongs to a first temperature level, outputting a first switching signal to the switching unit, the first switching signal being used to control the switching unit to output M first switching signals, the M first switching signals being used to control the first switching state of the multiple switches to change the M heat recovery units with the battery unit to a first connection state, the first connection state referring to the M heat recovery units being connected to the battery unit in series; if the first temperature value belongs to a second temperature level, outputting a second switching signal to the switching unit, the second switching signal being used to control the switching unit to output M second switching signals, the M second switching signals being used to control the second switching state of the multiple switches to change the M heat recovery units with the battery unit to a second connection state, the second connection state referring to the M heat recovery units being connected to the battery unit in parallel.

[0088] In one possible embodiment, the first switching signal includes a first switching sub-signal, the first temperature level includes a fourth temperature level and a fifth temperature level, the first heat recovery strategy includes a fourth heat recovery strategy and a fifth heat recovery strategy, the fourth temperature level corresponds to the fourth heat recovery strategy, the fifth temperature level corresponds to the fifth heat recovery strategy, the plurality of switches includes a first switch, a second switch, a third switch, a fourth switch, and a fifth switch, and the N heat recovery units include a heat pump unit, a heat exchanger unit, and a heat pipe unit; regarding the aspect of outputting a first switching signal to the switching unit if the first temperature value belongs to the first temperature level, the processing unit 33 is specifically used to: output a first switching sub-signal to the switching unit if the first temperature value belongs to the first temperature level, the first switching sub-signal being used to control the switching unit to output second switching signals to the first switch, the second switch, the third switch, the fourth switch, and the fifth switch respectively, so as to control the battery unit, the first switch, the heat exchanger unit, the second switch, the heat pipe unit, the third switch, the heat pump unit, the fourth switch, the fifth switch, and the battery unit to be connected sequentially.

[0089] In one possible embodiment, the second switching signal includes a second switching sub-signal, the N heat recovery units include a heat pump unit, a heat exchanger unit, and a heat pipe unit, the plurality of switches include a first switch and a sixth switch, the first switch being connected to the battery unit; regarding the aspect of outputting a second switching signal to the switching unit if the first temperature value belongs to the second temperature level, the processing unit 33 is specifically used to: output a second switching sub-signal to the switching unit if the first temperature value belongs to the second temperature level, the second switching sub-signal being used to control the switching unit to output a second switching signal to the first switch and the sixth switch respectively, so as to control the first switch to be connected to the sixth switch, and control the sixth switch to be connected to the heat pump unit, the heat exchanger unit, or the heat pipe unit.

[0090] In one possible embodiment, the heat pump unit includes multiple cascaded heat pump devices; regarding the aspect of outputting a second switching signal to the switching unit if the first temperature value belongs to the second temperature level, the processing unit 33 is specifically configured to: output a second switching signal to the switching unit if the first temperature value belongs to the second temperature level, the second switching signal being used to control the switching unit to output a sixth switching signal to the first switch and the sixth switch respectively, so as to control the first switch and the sixth switch to connect, and control the multiple cascaded heat pump devices to recover the heat generated by the battery unit step by step.

[0091] In one possible embodiment, after recovering heat from the battery cell according to the M heat recovery units, the heat recovery control device 30 further includes: acquiring M corresponding temperature change values ​​obtained by the sensor unit from the M heat recovery units within a first preset time period; determining whether a first heat recovery unit exists among the M heat recovery units based on the M temperature change values, wherein the first heat recovery unit refers to a heat recovery unit that has failed; if the first heat recovery unit exists, determining a second heat recovery unit from the N heat recovery units; and sending a third switching signal to the switching unit to replace the first heat recovery unit with the second heat recovery unit.

[0092] In one possible embodiment, the heat recovery control device 30 further includes: acquiring multiple first temperature values ​​within a second preset time period, starting from the start of operation of the battery cell; determining the heating rate of the battery cell based on the multiple first temperature values ​​and the second preset time period; invoking the switching unit to control the switching state of the switching unit according to the heating rate, so as to adjust the connection state of M heat recovery units among the N heat recovery units with the battery cell, where M is a positive integer less than or equal to N; and performing heat recovery on the battery cell according to the M heat recovery units.

[0093] As can be seen, in this application, the control unit first obtains the first temperature value detected by the sensor unit from the battery unit; determines the temperature level corresponding to the first temperature value, and the control unit sets multiple temperature levels, each temperature level including a temperature range; according to the temperature level, the switching unit is invoked to control the switching state of the switching unit to adjust the connection state of M heat recovery units out of the N heat recovery units with the battery unit, where M is a positive integer less than or equal to N; heat recovery is performed on the battery unit according to the M heat recovery units. In this way, different heat recovery units can be selected for heat recovery according to different temperature ranges, thereby improving heat recovery efficiency and increasing the equipment utilization rate of the recovery system.

[0094] The above embodiments can be implemented, in whole or in part, by software, hardware, firmware, or any other combination thereof. When implemented using software, the above embodiments can be implemented, in whole or in part, as a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired or wireless means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more sets of available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. A semiconductor medium can be a solid-state drive.

[0095] This application also provides a computer storage medium storing a computer program for electronic data interchange, which causes a computer to perform some or all of the steps of any of the methods described in the above method embodiments, wherein the computer includes an electronic device.

[0096] This application also provides a computer program product, which includes a non-transitory computer-readable storage medium storing a computer program operable to cause a computer to perform some or all of the steps of any of the methods described in the above method embodiments. The computer program product may be a software installation package, and the computer may include an electronic device.

[0097] It should be understood that in the various embodiments of this application, the order of the above-mentioned processes does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0098] In the several embodiments provided in this application, it should be understood that the disclosed methods, apparatuses, and systems can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for example, the division of units is merely a logical functional division, and other division methods may exist in actual implementation; for example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0099] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0100] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can be physically comprised separately, or two or more units can be integrated into one unit. The integrated unit described above can be implemented in hardware or in the form of hardware plus software functional units.

[0101] The integrated units implemented as software functional units described above can be stored in a computer-readable storage medium. These software functional units, stored in a storage medium, include several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute some steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes: a USB flash drive, a portable hard drive, a magnetic disk, an optical disk, volatile memory, or non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of random access memory (RAM) are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous linked DRAM (SLDRAM), and direct rambus RAM (DR RAM), etc., various media capable of storing program code.

[0102] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can easily conceive of variations or substitutions without departing from the spirit and scope of the present invention, and various modifications and alterations can be made, including combinations of the different functions and implementation steps described above, as well as software and hardware implementation methods, all of which are within the protection scope of the present invention.

Claims

1. A heat recovery method, characterized in that, A control unit applied in a battery system, the battery system including a battery cell, the control unit, a sensor unit, a switching unit, a switch unit, and N heat recovery units, where N is a positive integer greater than or equal to 2; the method includes: The sensor unit obtains a first temperature value by detecting the battery unit; The temperature level corresponding to the first temperature value is determined. The control unit is set with multiple temperature levels, and each temperature level includes a temperature range. The switching unit is invoked according to the temperature level to control the switching state of the switching unit, so as to adjust the connection state of M heat recovery units among the N heat recovery units with the battery unit, where M is a positive integer less than or equal to N; the connection state includes a first connection state and a second connection state, the first connection state means that the M heat recovery units are connected to the battery unit in series, and the second connection state means that the M heat recovery units are connected to the battery unit in parallel; Determine the heating rate of the battery cell; Predict whether the temperature level will change based on the heating rate; When a change in the temperature level is predicted, a corresponding heat recovery adjustment strategy is determined based on the predicted temperature level. The heat recovery adjustment strategy refers to the adjustment strategy for the N heat recovery units determined based on the predicted temperature level. The switching unit is invoked to control the switching state of the switching unit according to the heat recovery adjustment strategy.

2. The method according to claim 1, characterized in that, The switching unit includes multiple switches; the step of calling the switching unit to control the switching state of the switching unit according to the temperature level, so as to adjust the connection state of M heat recovery units among the N heat recovery units and the battery unit, includes: If the first temperature value belongs to the first temperature level, a first switching signal is output to the switching unit. The first switching signal is used to control the switching unit to output M first switching signals. The M first switching signals are used to control the first switching state of the multiple switches to change the M heat recovery units and the battery unit to a first connection state. If the first temperature value belongs to the second temperature level, a second switching signal is output to the switching unit. The second switching signal is used to control the switching unit to output M second switching signals. The M second switching signals are used to control the second switching state of the multiple switches to change the M heat recovery units and the battery unit to a second connection state.

3. The method according to claim 2, characterized in that, The first switching signal includes a first switching sub-signal; the first temperature level includes a fourth temperature level and a fifth temperature level; the first heat recovery strategy includes a fourth heat recovery strategy and a fifth heat recovery strategy; the fourth temperature level corresponds to the fourth heat recovery strategy; the fifth temperature level corresponds to the fifth heat recovery strategy; the plurality of switches includes a first switch, a second switch, a third switch, a fourth switch, and a fifth switch; and the N heat recovery units include a heat pump unit, a heat exchanger unit, and a heat pipe unit. If the first temperature value belongs to the first temperature level, outputting a first switching signal to the switching unit includes: If the first temperature value belongs to the first temperature level, a first switching sub-signal is output to the switching unit. The first switching sub-signal is used to control the switching unit to output second switching signals to the first switch, the second switch, the third switch, the fourth switch and the fifth switch respectively, so as to control the battery unit, the first switch, the heat exchanger unit, the second switch, the heat pipe unit, the third switch, the heat pump unit, the fourth switch, the fifth switch and the battery unit to be connected in sequence.

4. The method according to claim 2, characterized in that, The second switching signal includes a second switching sub-signal; the N heat recovery units include a heat pump unit, a heat exchanger unit, and a heat pipe unit; the plurality of switches include a first switch and a sixth switch; and the first switch is connected to the battery unit. The step of outputting a second switching signal to the switching unit if the first temperature value belongs to the second temperature level includes: If the first temperature value belongs to the second temperature level, a second switching sub-signal is output to the switching unit. The second switching sub-signal is used to control the switching unit to output a second switching signal to the first switch and the sixth switch respectively, so as to control the first switch to connect with the sixth switch and control the sixth switch to connect with the heat pump unit, heat exchange unit or heat pipe unit.

5. The method according to claim 4, characterized in that, The heat pump unit includes multiple cascaded heat pump devices; If the first temperature value belongs to the second temperature level, a second switching signal is output to the switching unit. The second switching signal is used to control the switching unit to output a sixth switching signal to the first switch and the sixth switch respectively, so as to control the first switch and the sixth switch to connect and control the multiple cascaded heat pump devices to recover the heat generated by the battery unit step by step.

6. The method according to any one of claims 1-5, characterized in that, The method further includes: The sensor unit detects M temperature change values ​​corresponding to the M heat recovery units within a first preset time period. Based on the M temperature change values, determine whether there is a first heat recovery unit among the M heat recovery units, where the first heat recovery unit refers to the heat recovery unit that has malfunctioned; If the first heat recovery unit exists, then the second heat recovery unit is determined from the N heat recovery units; A third switching signal is sent to the switching unit to replace the first heat recovery unit with the second heat recovery unit.

7. The method according to any one of claims 1-5, characterized in that, The method further includes: Starting from the point when the battery cell begins to work, multiple first temperature values ​​are acquired within a second preset time period; The heating rate of the battery cell is determined based on the plurality of first temperature values ​​and the second preset time. The switching unit is invoked according to the heating rate to control the switching state of the switching unit, so as to adjust the number of heat recovery units participating in heat recovery among the N heat recovery units, and the connection state between the adjusted heat recovery units and the battery unit. The adjusted heat recovery unit performs heat recovery on the battery cell.

8. A heat recovery control device, characterized in that, A control unit applied in a battery system, wherein the battery system includes a battery cell, a control unit, a sensor unit, a switching unit, a switch unit, and N heat recovery units, where N is a positive integer greater than or equal to 2; the control unit includes: An acquisition unit is used to acquire the temperature value obtained by the sensor unit from the battery unit; A determining unit is configured to determine the temperature level corresponding to the temperature value, wherein the control unit is configured with multiple temperature levels, and each temperature level includes a temperature range; and to determine a heat recovery strategy based on the temperature level. The processing unit is configured to call the switching unit to control the switching state of the switching unit according to the heat recovery strategy, so as to adjust the connection state of M heat recovery units among the N heat recovery units with the battery unit, where M is a positive integer less than or equal to N; the connection state includes a first connection state and a second connection state, the first connection state refers to the M heat recovery units being connected to the battery unit in series, and the second connection state refers to the M heat recovery units being connected to the battery unit in parallel; The determining unit is also used to determine the heating rate of the battery cell; A prediction unit is used to predict whether the temperature level will change based on the heating rate. The determining unit is further configured to determine a corresponding heat recovery adjustment strategy based on the predicted temperature level when the temperature level is predicted to change, wherein the heat recovery adjustment strategy refers to the adjustment strategy for the N heat recovery units determined based on the predicted temperature level. The calling unit is used to call the switching unit to control the switching state of the switching unit according to the heat recovery adjustment strategy.

9. An electronic device, characterized in that, The method includes a processor, a memory, a communication interface, and one or more programs, said one or more programs being stored in the memory and configured to be executed by the processor, said programs including instructions for performing the steps of the method as described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, A computer program for storing electronic data interchange is provided, wherein the computer program causes a computer to execute instructions for the steps of the method as described in any one of claims 1-7.

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