Temperature adjusting device and battery system

Abstract

The utility model relates to a temperature adjusting device and a battery system. The device comprises a battery pack, a heating piece and a power adjusting assembly, the power adjusting assembly is connected with the battery pack, and the heating piece is used for adjusting the temperature of the battery pack; the power adjusting assembly is used for adjusting the heating power provided by the battery pack to the heating piece, the heating power of the heating piece is actively adjusted, and then the heating time and the heating rate of the battery pack at the low temperature can be adaptively adjusted. The battery pack is adopted to provide the heating power, the heating power of the heating piece is changed by adjusting the heating power of the battery pack, the heating time of the battery pack is flexibly adjusted, the temperature rise rate of the battery pack in the heating process can be adaptively adjusted, and the service life of the battery pack is prolonged.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a temperature regulation device and battery system. Background Technology

[0002] Batteries are prone to lithium plating when charged and discharged at low temperatures, which also increases internal resistance and leads to a decrease in battery capacity and lifespan. Therefore, at low temperatures, batteries usually need to be preheated to a certain temperature range before charging and discharging.

[0003] Currently, in existing low-temperature battery heating methods, as the battery temperature gradually increases, the resistance of the heater gradually decreases, and the heating power increases with the temperature, resulting in a single method for adjusting the battery's heating power and heating rate. Utility Model Content

[0004] Based on this, a temperature regulation device and a battery system are provided.

[0005] In a first aspect, this application provides a temperature regulating device, comprising:

[0006] Battery pack;

[0007] Heating element, which is connected to the battery pack, is used to regulate the temperature of the battery pack;

[0008] The power regulation component is connected to the battery pack and is used to regulate the heating power supplied by the battery pack to the heating element.

[0009] In one embodiment, the battery pack includes at least two individual cells connected in series; the power regulation component includes a switching component connected to each individual cell.

[0010] The switching assembly is used to control the on / off state of the corresponding individual battery cells in order to regulate the heating power output of the battery pack.

[0011] In one embodiment, the switch assembly includes a first switch group and a second switch group; the first switch group includes at least one first switch, and the second switch group includes at least one second switch.

[0012] A first switch is connected in series between two adjacent individual batteries; the first end of a second switch is connected between the first switch and the negative terminal of the corresponding individual battery, and the second end of the corresponding second switch is connected to the negative terminal of the heating element; the positive terminal of the battery pack is connected to the positive terminal of the heating element, and the negative terminal of the battery pack is connected to the negative terminal of the heating element.

[0013] In one embodiment, the power regulation component further includes a processor connected to the switching component.

[0014] In one embodiment, the switching assembly further includes a third switch;

[0015] The first end of the third switch is connected to the positive terminal of the heating element, and the second end of the third switch is connected to the positive terminal of the battery pack.

[0016] In one embodiment, the temperature regulating device further includes an auxiliary power supply and a power regulating module;

[0017] The input terminal of the power conditioning module is connected to the auxiliary power supply, and the output terminal of the power conditioning module is connected to the heating element.

[0018] In one embodiment, the power conditioning module includes a transformer, an inverter, and a rectifier;

[0019] The first terminal of the inverter is connected to the auxiliary power supply, and the second terminal of the inverter is connected to the primary terminal of the transformer; the first terminal of the rectifier is connected to the secondary terminal of the transformer, and the second terminal of the rectifier is connected to the heating element.

[0020] In one embodiment, the power regulation module further includes a fourth switch;

[0021] The fourth switch is connected between the auxiliary power supply and the inverter.

[0022] In one embodiment, the temperature regulating device further includes a temperature sensor; the temperature sensor is connected to the power regulating component;

[0023] The temperature sensor is located in the battery pack.

[0024] Secondly, this application provides a battery system including a battery pack and a temperature regulating device as described in any of the above; the battery pack is connected to the temperature regulating device.

[0025] One of the above technical solutions has the following advantages and beneficial effects:

[0026] The aforementioned temperature regulation device includes a battery pack, a heating element, and a power regulation component. The heating element is connected to the battery pack, and the power regulation component is also connected to the battery pack. The heating element is used to regulate the temperature of the battery pack. The power regulation component is used to regulate the heating power provided by the battery pack to the heating element, thereby actively regulating the heating power of the heating element and adaptively adjusting the heating time and heating rate of the battery pack at low temperatures. This application uses a battery pack to provide heating power. By adjusting the heating power of the battery pack, the heating power of the heating element is changed, enabling flexible adjustment of the heating time of the battery pack. This allows for adaptive adjustment of the temperature rise rate of the battery pack during the heating process, improving the service life of the battery pack. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the first structure of the temperature regulating device in the embodiments of this application;

[0028] Figure 2 This is a schematic diagram of the second structure of the temperature regulating device in the embodiments of this application;

[0029] Figure 3 This is a schematic diagram of the third structure of the temperature regulating device in the embodiments of this application;

[0030] Figure 4 This is a schematic diagram of the fourth structure of the temperature regulating device in the embodiments of this application;

[0031] Figure 5 This is a schematic diagram of the fifth structure of the temperature regulating device in the embodiments of this application;

[0032] Figure 6 This is a schematic diagram of the sixth structure of the temperature regulation device in the embodiments of this application;

[0033] Figure 7 This is a schematic diagram of the seventh structure of the temperature regulation device in the embodiments of this application.

[0034] Figure label:

[0035] 10. Battery pack; 110. Individual cell; 20. Heating element; 30. Power regulation assembly; 300. Switch assembly; 310. First switch group; 312. First switch; 320. Second switch group; 324. Second switch; 330. Third switch; 340. Processor; 410. Auxiliary power supply; 420. Power regulation module; 422. Transformer; 424. Inverter; 426. Rectifier; 428. Fourth switch; 50. Temperature sensor. Detailed Implementation

[0036] 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 should fall within the scope of protection of the present application.

[0037] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be used interchangeably where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover inclusions not explicitly listed. For example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0038] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0039] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0040] In addition, the term "multiple" should mean two or more.

[0041] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0042] In one embodiment, such as Figure 1 As shown, a temperature regulation device is provided, including a battery pack 10, a heating element 20, and a power regulation component 30. The heating element 20 is connected to the battery pack 10 and is used to regulate the temperature of the battery pack 10. The power regulation component 30 is connected to the battery pack 10 and is used to regulate the heating power provided by the battery pack 10 to the heating element 20.

[0043] The battery pack 10 may include a plurality of individual cells 110, which may be composed of such cells connected in series and / or in parallel. For example, the battery pack 10 may include at least one battery branch formed by series connection, and the battery branch may include at least two individual cells 110. It should be noted that the individual cells 110 may be, but are not limited to, lithium-ion batteries; for example, the individual cells 110 may be lithium iron phosphate cells, ternary lithium cells, or lithium manganese iron phosphate cells. The individual cells 110 may have a regular shape structure such as square or round; in another example, the individual cells 110 may also have an irregular shape structure.

[0044] The heating element 20 is used to regulate the temperature of the battery pack 10. For example, when the battery pack 10 needs to be charged and discharged under low-temperature conditions, the heating element 20 can preheat the battery pack 10, raising its temperature to a suitable range before charging and discharging, thereby improving the lifespan of the battery pack 10 and reducing its capacity degradation rate. The heating element 20 can be disposed adjacent to at least one side of the battery pack 10; for example, the heating element 20 can be disposed on the bottom surface of the battery pack. Exemplarily, the battery pack 10 can be disposed inside a battery casing, and the heating element 20 can be disposed adjacent to at least one side of the battery casing. Since the battery pack 10 is connected to the heating element 20, the battery pack 10 can provide an electrical signal to the heating element 20, causing the heating element 20 to operate, thereby regulating the temperature of the battery pack 10.

[0045] The power adjustment component 30 can be used to adjust the output voltage of the battery pack 10, that is, the power adjustment component 30 can adjust the heating power output by the battery pack 10 to the heating element 20, thereby adjusting the heating power of the heating element 20.

[0046] Since the power regulation component 30 is connected to the battery pack 10, the heating power output of the battery pack 10 can be adjusted according to the temperature of the battery pack 10. For example, when the temperature of the battery pack 10 is too low, the heating power output of the battery pack 10 can be increased, that is, the heating power of the heating element 20 can be increased; when the temperature of the battery pack 10 rises, the heating power output of the battery pack 10 can be decreased, that is, the heating power of the heating element 20 can be decreased, thereby realizing the regulation of the temperature rise rate of the battery pack 10 and realizing flexible adjustment of the heating time of the battery pack 10.

[0047] In the aforementioned temperature regulation device, a heating element 20 is connected to a battery pack 10, and a power regulation component 30 is also connected to the battery pack 10. The heating element 20 is used to regulate the temperature of the battery pack 10; the power regulation component 30 is used to regulate the heating power supplied by the battery pack 10 to the heating element 20, thereby actively regulating the heating power of the heating element 20 and adaptively adjusting the heating time and heating rate of the battery pack 10 at low temperatures. This application uses the battery pack 10 to provide heating power. By adjusting the heating power of the battery pack 10, the heating power of the heating element 20 is changed, enabling flexible adjustment of the heating time of the battery pack 10. This allows for adaptive adjustment of the temperature rise rate of the battery pack 10 during the heating process, improving the service life of the battery pack 10.

[0048] In one embodiment, such as Figure 2 As shown, the battery pack 10 includes at least two individual cells 110, which are connected in series; the power regulation component 30 includes a switch component 300, which is connected to each individual cell 110; the switch component 300 is used to control the on / off state of the corresponding individual cell 110 to regulate the heating power output by the battery pack 10.

[0049] For example, the battery pack 10 may be composed of individual battery cells 110 connected in series; alternatively, the battery pack 10 may also be composed of at least two battery branches connected in parallel, wherein each battery branch may be composed of at least two individual battery cells connected in series. The switch assembly 300 may be used to control the on / off state of any one individual battery cell 110 in the battery pack 10; the switch assembly 300 may also be used to control the on / off state of multiple individual battery cells 110 in the battery pack 10. For example, the battery pack 10 includes three individual battery cells 110 connected in series. The switch assembly 300 may control one of the individual battery cells 110 to disconnect, allowing the remaining two individual battery cells 110 to supply power to the heating element 20, thereby changing the power supply from the battery pack 10 to the heating element 20 and adjusting the heating power of the heating element 20. In another example, the battery pack 10 includes three individual batteries 110 connected in series. The switch assembly 300 can control two of the individual batteries 110 to disconnect, so that the remaining individual battery 110 supplies power to the heating element 20, thereby changing the power supply from the battery pack 10 to the heating element 20 and adjusting the heating power of the heating element 20.

[0050] Based on the connection of each individual battery 110 by the switch assembly 300, the switch assembly 300 controls the disconnection of the corresponding individual battery 110, and the remaining individual batteries 110 form a new power supply circuit to supply power to the heating element 20. By adjusting the number of connected individual batteries 110 in the battery pack 10, the power supply voltage from the battery pack 10 to the heating element 20 is changed, thereby changing the heating power of the heating element 20. This allows for flexible adjustment of the heating time of the battery pack 10, adaptive adjustment of the temperature rise rate of the battery pack 10 during the heating process, and improvement of the service life of the battery pack 10.

[0051] For example, when the temperature of the battery pack 10 is too low, the switching component 300 can control each individual battery cell 110 to conduct, thereby increasing the heating power output of the battery pack 10, i.e., increasing the heating power of the heating element 20; when the temperature of the battery pack 10 rises, the switching component 300 can control at least one individual battery cell 110 to disconnect, reducing the number of series-connected individual battery cells 110 in the battery pack 10 to conduct, thereby reducing the heating power output of the battery pack 10, i.e., reducing the heating power of the heating element 20, thus achieving adjustment of the temperature rise rate of the battery pack 10 and flexibly adjusting the heating time of the battery pack 10. In another example, the number of series-connected individual battery cells 110 can also be adjusted according to a preset temperature rise rate to achieve adaptive adjustment of the temperature rise rate of the battery pack 10 during the heating process.

[0052] In one embodiment, such as Figure 3 As shown, the switch assembly 300 includes a first switch group 310 and a second switch group 320; the first switch group 310 includes at least one first switch 312, and the second switch group 320 includes at least one second switch 324; the first switch 312 is connected in series between two adjacent single cells 110; the first end of the second switch 324 is connected between the first switch 312 and the negative terminal of the corresponding single cell 110, and the second end of the corresponding second switch 324 is connected to the negative terminal of the heating element 20; the positive terminal of the battery pack 10 is connected to the positive terminal of the heating element 20, and the negative terminal of the battery pack 10 is connected to the negative terminal of the heating element 20.

[0053] The number of first switches 312 is determined by the number of individual battery cells 110. For example, if the battery pack 10 includes three individual battery cells 110 connected in series, then there are two first switches 312. Similarly, the number of second switches 324 is determined by the number of individual battery cells 110. For example, if the battery pack 10 includes three individual battery cells 110 connected in series, then there are two second switches 324. The first switch 312 may be, but is not limited to, a MOS switch. For example, the first switch 312 may be an N-type MOS switch. The second switch 324 may be, but is not limited to, a MOS switch. For example, the second switch 324 may be an N-type MOS switch.

[0054] For example, such as Figure 4As shown, the battery pack 10 includes a first single cell, a second single cell, and a third single cell connected in series. The positive terminal of the first single cell is connected to the first terminal of a first switch 312, and the second terminal of the corresponding first switch 312 is connected to the negative terminal of the second single cell. The positive terminal of the second single cell is connected to the first terminal of another first switch 312, and the second terminal of the corresponding first switch 312 is connected to the negative terminal of the third single cell. The positive terminal of the third single cell is connected to the positive terminal of the heating element 20, and the negative terminal of the first single cell is connected to the negative terminal of the heating element. A second switch 324 is connected between the first switch 312 and the negative terminal of the second single cell, and the second terminal of the corresponding second switch 324 is connected to the heating element. The negative terminal of the heating element 20 is connected to the first switch 312 and the negative terminal of the third single cell. The second terminal of the second switch 324 is connected to the negative terminal of the heating element 20. The power supplies for the first, second, and third single cells are set to V. When the first switch 312 between the first and second single cells is open, the first switch 312 between the second and third single cells is open, the second switch 324 connecting the second single cell is open, and the second switch 324 connecting the third single cell is closed, only the third single cell supplies power to the heating element 20. Therefore, the terminal voltage supplied by the battery pack 10 to the heating element 20 at this time is V. When the first switch 312 between the first and second single cells is open, the second switch 324 connecting the third single cell is open, the first switch 312 between the second and third single cells is closed, and the second switch 324 connecting the second single cell is closed, the second and third single cells are connected in series to supply power to the heating element 20. Therefore, the terminal voltage supplied by the battery pack 10 to the heating element 20 at this time is 2V. When the second switch 324 connecting the second single cell is open, the second switch 324 connecting the third single cell is open, and the first switch 312 between the first single cell and the second single cell is closed, the first switch 312 between the second single cell and the third single cell is closed, the first single cell, the second single cell and the third single cell are connected in series to supply power to the heating element 20. Therefore, the terminal voltage provided by the battery pack 10 to the heating element 20 at this time is 3V.

[0055] In the above embodiments, by controlling the on / off state of each first switch 312 and each second switch 324, the on / off state of the corresponding individual battery 110 is controlled, and the remaining individual battery 110 forms a new power supply circuit to supply power to the heating element 20. By adjusting the number of conducting individual batteries 110, the power supply voltage from the battery pack 10 to the heating element 20 is changed, thereby changing the heating power of the heating element 20. This allows for flexible adjustment of the heating time of the battery pack 10, adaptive adjustment of the temperature rise rate of the battery pack 10 during the heating process, and improved service life of the battery pack 10.

[0056] It should be noted that the battery pack 10 may also include 4, 5 or more individual cells 110 connected in series. The control method for 4, 5 or more individual cells 110 connected in series is similar to the control method for 3 individual cells 110 connected in series, and will not be described in detail here.

[0057] In one embodiment, such as Figure 5 As shown, the power regulation component 30 also includes a processor 340, which is connected to the switch component 300.

[0058] The processor 340 can be, but is not limited to, a BMS (Battery Management System). For example, the processor 340 can also be an EMS (Energy Management System), or it can be a separately configured processing module.

[0059] Since the processor 340 is connected to the switch assembly 300, the processor 340 can be used to control the on / off state of the switch assembly 300. For example, the processor 340 can be used to control the on / off state of each first switch 312 and each second switch 324.

[0060] In one embodiment, such as Figure 3 As shown, the switch assembly 300 also includes a third switch 330; the first end of the third switch 330 is the positive electrode of the heating element 20, and the second end of the third switch 330 is connected to the positive electrode of the battery pack 10.

[0061] The third switch 330 can be, but is not limited to, a MOSFET switch. For example, the third switch 330 can be an N-type MOSFET switch. The third switch 330 is the main switch for the power supply terminal of the heating element 20. When the third switch 330 is open, the power supply from the battery pack 10 to the heating element 20 is disconnected.

[0062] For example, the battery pack 10 includes a first single cell, a second single cell, and a third single cell connected in series. The power supply for the first single cell, the second single cell, and the third single cell is set to V. When the third switch 330 is open, the power supply from the battery pack 10 to the heating element 20 is disconnected, so the terminal voltage provided by the battery pack 10 to the heating element 20 is 0 at this time. When the first switch 312 between the first single cell and the second single cell is open, the first switch 312 between the second single cell and the third single cell is open, the second switch 324 connecting the second single cell is open, and the second switch 324 connecting the third single cell is closed and the third switch 330 is closed, only the third single cell supplies power to the heating element 20, so the terminal voltage provided by the battery pack 10 to the heating element 20 is V at this time. When the first switch 312 between the first and second individual cells is open, the second switch 324 connecting the third individual cell is open, and the first switch 312 between the second and third individual cells is closed, the second switch 324 connecting the second individual cell is closed, and the third switch 330 is closed, the second and third individual cells in series supply power to the heating element 20. Therefore, the terminal voltage provided by the battery pack 10 to the heating element 20 at this time is 2V. When the second switch 324 connecting the second single cell is open, the second switch 324 connecting the third single cell is open, and the first switch 312 between the first and second single cells is closed, the first switch 312 between the second and third single cells is closed, and the third switch 330 is closed, the first, second, and third single cells are connected in series to supply power to the heating element 20. Therefore, the terminal voltage supplied by the battery pack 10 to the heating element 20 is 3V at this time. By controlling the opening and closing of the third switch 330, each second switch 324, and each first switch 312, the number of connected single cells 110 in the battery pack 10 can be adjusted, thereby changing the supply voltage of the battery pack 10 to the heating element 20, thus changing the heating power of the heating element 20. This achieves active adjustment of the heating time and temperature rise rate of the battery pack 10, improving the service life of the battery pack 10.

[0063] In one embodiment, such as Figure 6 As shown, the temperature regulating device also includes an auxiliary power supply 410 and a power regulating module 420; the input terminal of the power regulating module 420 is connected to the auxiliary power supply 410, and the output terminal of the power regulating module 420 is connected to the heating element 20.

[0064] The auxiliary power supply 410 can be a DC power supply, such as a portable DC power supply. The power adjustment module 420 is used to adjust the electrical signal transmitted by the auxiliary power supply 410 and transmit the adjusted electrical signal to the heating element 20 to supply power to the heating element 20.

[0065] Since the power adjustment module 420 is connected between the auxiliary power supply 410 and the heating element 20, the electrical signal output by the auxiliary power supply 410 is adjusted by the power adjustment module 420 and then transmitted to the heating element 20, so as to realize the adjustable connection of the terminal voltage of the heating element 20, thereby realizing the adaptive adjustment of the heating power and temperature rise rate of the heating element 20.

[0066] For example, when the battery pack 10 is under low temperature conditions, the power regulation module 420 can be controlled to regulate the electrical signal transmitted by the auxiliary power supply 410, thereby adjusting the power supply voltage of the auxiliary power supply 410 to the heating element 20, thereby changing the heating power of the heating element 20, and realizing the active adjustment of the heating time and temperature rise rate of the battery pack 10. This enables constant power or constant temperature rise rate to heat the battery pack 10 at low temperatures. By using an external auxiliary power supply 410 in conjunction with the power regulation module 420 to adjust the heating power of the heating element 20, it can be adapted to various types of heaters, improving the versatility and adaptability of the low temperature heating method of the battery pack 10.

[0067] In one embodiment, such as Figure 7 As shown, the power regulation module 420 includes a transformer 422, an inverter 424, and a rectifier 426; the first end of the inverter 424 is connected to the auxiliary power supply 410, and the second end of the inverter 424 is connected to the primary end of the transformer 422; the first end of the rectifier 426 is connected to the secondary end of the transformer 422, and the second end of the rectifier 426 is connected to the heating element 20.

[0068] The inverter 424 can convert the DC power from the auxiliary power supply 410 into AC power; the transformer 422 can be used to convert the AC power transmitted by the inverter 424 into transformed AC power; the rectifier 426 can be used to convert the transformed AC power into DC power, and then provide the regulated DC power to the heating element 20 to realize the power supply to the heating element 20.

[0069] Since the inverter 424 is connected between the auxiliary power supply 410 and the transformer 422, and the rectifier 426 is connected between the transformer 422 and the heating element 20, when the battery pack 10 is under low temperature conditions, the DC signal transmitted from the auxiliary power supply 410 is converted and processed by the inverter 424, and then transmitted to the transformer 422 as an AC signal. By adjusting the output voltage of the transformer 422 (e.g., increasing or decreasing the output voltage according to the temperature of the battery pack 10), the transformed AC signal is transmitted to the rectifier 426. The rectifier 426 then converts the transformed AC signal into a corresponding output voltage. The auxiliary power supply 410 transmits a DC signal to the heating element 20, thereby adjusting the supply voltage of the heating element 20 and changing its heating power. This allows for active adjustment of the heating time and temperature rise rate of the battery pack 10, enabling constant power or constant temperature rise rate for low-temperature heating of the battery pack 10. The heating power of the heating element 20 is adjusted by using an external auxiliary power supply 410 in conjunction with a power adjustment module 420. This method is compatible with various types of heaters, improving the versatility and adaptability of the low-temperature heating method for the battery pack 10.

[0070] In one embodiment, such as Figure 7 As shown, the power regulation module 420 also includes a fourth switch 428; the fourth switch 428 is connected between the auxiliary power supply 410 and the inverter 424.

[0071] The fourth switch 428 can be used to control the on / off state of the auxiliary power supply 410. For example, when the fourth switch 428 is closed, the auxiliary power supply 410 can transmit DC signals to the inverter 424; when the fourth switch 428 is open, the auxiliary power supply 410 stops transmitting DC signals to the inverter 424, thereby realizing the on / off control of the auxiliary power supply 410.

[0072] In one embodiment, such as Figure 7 As shown, the temperature regulation device also includes a temperature sensor 50; the temperature sensor 50 is connected to the power regulation component 30; the temperature sensor 50 is disposed in the battery pack 10.

[0073] The temperature sensor 50 can be an NTC (thermistor). The temperature sensor 50 can be located on any side of the battery pack 10. The temperature sensor 50 can be used to collect the temperature of the battery pack 10 and transmit the collected temperature signal to the power regulation component 30, which can then adjust the heating power output of the battery pack 10 according to the temperature signal.

[0074] For example, the temperature of the battery pack 10 is detected by the temperature sensor 50, and the detected temperature signal is transmitted to the processor 340. The processor 340 calculates the temperature difference in fixed steps to obtain the corresponding actual temperature rise rate. By comparing the actual temperature rise rate with the set temperature rise rate, if the actual temperature rise rate is less than the set temperature rise rate, the number of conducting cells 110 in the battery pack 10 is increased; if the actual temperature rise rate is greater than the set temperature rise rate, the number of conducting cells 110 in the battery pack 10 is decreased. This achieves active adjustment of the temperature rise rate of the heating element 20, realizing constant temperature rise rate heating of the battery pack 10. It can adaptively adjust the heating power of the heating element 20, flexibly adjust the heating time of the battery pack 10, improve the timeliness and adjustment accuracy of low-temperature heating of the battery pack 10, and improve the service life of the battery pack 10.

[0075] In one embodiment, a battery system is also provided, including a battery pack and a temperature regulating device as described in any of the above embodiments; the battery pack is connected to the temperature regulating device.

[0076] For details regarding the battery pack and temperature regulation device, please refer to the specific descriptions of the battery pack and temperature regulation device in the above embodiments, which will not be repeated here.

[0077] The temperature regulation device includes a battery pack, a heating element, and a power regulation component. The heating element is connected to the battery pack, and the power regulation component is connected to the battery pack. The power regulation component regulates the heating power provided by the battery pack to the heating element, and the heating element regulates the temperature of the battery pack. This enables active regulation of the heating power of the heating element, thereby adaptively adjusting the heating time and heating rate of the battery system at low temperatures.

[0078] In the above embodiments, a battery pack is used to provide heating power. By adjusting the heating power of the battery pack, the heating power of the heating element can be changed, thereby flexibly adjusting the heating time of the battery pack. This allows for adaptive adjustment of the temperature rise rate of the battery pack during the heating process, improving the service life of the battery system.

[0079] It should be noted that the battery system may also include components such as a battery housing. A specific battery system may include more components than those described in the above embodiments, or combine certain components, or have different component arrangements.

[0080] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0081] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A temperature regulating device, characterized in that, include: Battery pack; A heating element connected to the battery pack, the heating element being used to regulate the temperature of the battery pack; A power regulation component is connected to the battery pack and is used to regulate the heating power supplied by the battery pack to the heating element.

2. The temperature regulating device according to claim 1, characterized in that, The battery pack includes at least two individual cells connected in series; the power regulation component includes a switching component connected to each of the individual cells. The switching assembly is used to control the on / off state of the corresponding individual battery cells to adjust the heating power output by the battery pack.

3. The temperature regulating device according to claim 2, characterized in that, The switch assembly includes a first switch group and a second switch group; the first switch group includes at least one first switch, and the second switch group includes at least one second switch. The first switch is connected in series between two adjacent individual batteries; the first end of the second switch is connected between the first switch and the negative terminal of the corresponding individual battery, and the second end of the second switch is connected to the negative terminal of the heating element; the positive terminal of the battery pack is connected to the positive terminal of the heating element, and the negative terminal of the battery pack is connected to the negative terminal of the heating element.

4. The temperature regulating device according to claim 2, characterized in that, The power regulation component also includes a processor connected to the switching component.

5. The temperature regulating device according to claim 3, characterized in that, The switching assembly also includes a third switch; The first end of the third switch is the positive electrode of the heating element, and the second end of the third switch is connected to the positive electrode of the battery pack.

6. The temperature regulating device according to any one of claims 1 to 5, characterized in that, It also includes an auxiliary power supply and a power regulation module; The input terminal of the power regulation module is connected to the auxiliary power supply, and the output terminal of the power regulation module is connected to the heating element.

7. The temperature regulating device according to claim 6, characterized in that, The power regulation module includes a transformer, an inverter, and a rectifier; The first end of the inverter is connected to the auxiliary power supply, and the second end of the inverter is connected to the primary end of the transformer; the first end of the rectifier is connected to the secondary end of the transformer, and the second end of the rectifier is connected to the heating element.

8. The temperature regulating device according to claim 7, characterized in that, The power regulation module also includes a fourth switch; The fourth switch is connected between the auxiliary power supply and the inverter.

9. The temperature regulating device according to any one of claims 1 to 5, characterized in that, It also includes a temperature sensor; the temperature sensor is connected to the power regulation component; The temperature sensor is located in the battery pack.

10. A battery system, characterized in that, It includes a battery pack and a temperature regulating device as described in any one of claims 1 to 9; the battery pack is connected to the temperature regulating device.

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