Battery control method and device, battery pack and vehicle

Abstract

The invention provides a battery control method and device and a battery pack, and relates to the technical field of battery management.The battery pack comprises a heat exchange part, a plurality of battery monomers, a first sensor and a second sensor; the heat exchange piece is used for carrying out heat exchange on the plurality of single batteries; the first sensor is arranged in an output electrode area of the single battery, and the second sensor is arranged in a position, corresponding to an inlet of the heat exchange piece, of the single battery. Different calculation strategies are determined through the temperatures of the single batteries, the current value is obtained, calculation errors caused by using the same calculation strategy under different working conditions are reduced, the accuracy of obtaining the current value is improved, and the safety of battery operation is enhanced.

Description

Technical Field

[0001] The present application relates to the technical field of battery management, and particularly to a battery control method, device, battery pack and vehicle. Background Art

[0002] During the operation of battery cells in a battery, there are various working conditions. Under certain conditions, there is a temperature difference at different positions of the battery, resulting in inconsistent allowable charging current capabilities at different positions of the battery cells. If the battery charging current is controlled only according to the temperature of one of the parts, it may cause lithium plating in the battery cells and result in a short circuit. Summary of the Invention

[0003] The present application aims to solve at least one of the technical problems in the related art to some extent.

[0004] To this end, the first object of the present application is to propose a battery pack.

[0005] The second object of the present application is to propose a battery control method.

[0006] The third object of the present application is to propose a device.

[0007] The fourth object of the present application is to propose an electronic device.

[0008] The fifth object of the present application is to propose a computer-readable storage medium.

[0009] The sixth object of the present application is to propose a battery pack.

[0010] The seventh object of the present application is to propose a vehicle.

[0011] To achieve the above object, an embodiment of the first aspect of the present application proposes a battery pack, including:

[0012] a heat exchange member, a plurality of battery cells, a first sensor and a second sensor;

[0013] The heat exchange member is used to exchange heat for the plurality of battery cells;

[0014] The first sensor is arranged in the output pole region of the battery cell, and the second sensor is arranged at a position corresponding to the inlet of the battery cell and the heat exchange plate.

[0015] To achieve the above object, an embodiment of the second aspect of the present application proposes a battery control method, including:

[0016] When cooling the plurality of battery cells, obtain a first temperature value of a first sensor and a second temperature value of a second sensor, and control the current of the plurality of battery cells according to the first temperature value and the second temperature value.

[0017] Optionally, controlling the current of the battery cell according to the first temperature value and the second temperature value includes:

[0018] In response to the difference between the first temperature value and the second temperature value being greater than a first preset value, determine the target current of the battery cell according to the second temperature value and the first preset value.

[0019] Optionally, the first preset value is determined by at least one of the chemical system of the battery cell, the size, and the heat exchange capacity of the heat exchange component.

[0020] Optionally, controlling the current of the battery cell according to the first temperature value and the second temperature value includes:

[0021] In response to the difference between the first temperature value and the second temperature value being less than the first preset value, determine the target current of the battery cell according to the first temperature value.

[0022] Optionally, controlling the current of the battery cell according to the first temperature value and the second temperature value includes:

[0023] Obtain the first temperature values of a plurality of the first sensors, take the maximum value of the first temperature values and compare it with the second sensor to determine the target current of the battery cell.

[0024] Optionally, the method further includes:

[0025] In response to there being a plurality of the first temperature values and at least one of the first temperature values being greater than a second preset value, turn on the cooling.

[0026] Optionally, the method further includes:

[0027] In response to there being a plurality of the first temperature values and at least one of the first temperature values being less than a second preset value, turn on the heating;

[0028] Determine the target current of the battery cell according to the minimum value of the first temperature values.

[0029] Optionally, the method further includes:

[0030] In response to the first temperature value being less than a second preset value and greater than a third preset value, do not turn on the cooling or heating;

[0031] Determine the target current of the battery cell according to the average value of the first temperature value.

[0032] To achieve the above object, an embodiment of the third aspect of the present application provides a battery control device, including:

[0033] A battery management module, configured to obtain a first temperature value of a first sensor and a second temperature value of a second sensor when cooling the plurality of battery cells, and control the current of the battery cells according to the first temperature value and the second temperature value.

[0034] To achieve the above object, an embodiment of the fourth aspect of the present application provides an electronic device, including: a processor, and a memory communicatively connected to the processor;

[0035] The memory stores computer-executable instructions;

[0036] The processor executes the computer-executable instructions stored in the memory to implement the method according to any one of the second aspects.

[0037] To achieve the above object, an embodiment of the fifth aspect of the present application provides a computer-readable storage medium, in which computer-executable instructions are stored, and when the computer-executable instructions are executed by a processor, they are used to implement the method according to any one of the second aspects.

[0038] To achieve the above object, an embodiment of the sixth aspect of the present application provides a battery pack, including a battery management system, wherein the battery management system is configured to execute the method according to any one of the second aspects.

[0039] To achieve the above object, an embodiment of the seventh aspect of the present application provides a vehicle, including the battery pack according to any one of the first aspect or the sixth aspect.

[0040] The battery control method, device, electronic device and storage medium provided by the present application determine different calculation strategies through the temperature of the battery cell, realize the acquisition of the current value, reduce the calculation error caused by using the same calculation strategy under different working conditions, improve the accuracy of the current value acquisition, and enhance the safety of the battery operation.

[0041] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present application. Description of the Drawings

[0042] The above and / or additional aspects and advantages of the present application will become apparent and be easily understood from the following description of the embodiments in conjunction with the drawings, where:

[0043] Figure 1Schematic diagram of the structure of a battery pack provided by an embodiment of the present application.

[0044] Figure 2 Schematic diagram of the structure of a battery cell provided by an embodiment of the present application;

[0045] Figure 3 Schematic flowchart of a battery control method provided by an embodiment of the present application;

[0046] Figure 4 Schematic flowchart of a battery control method provided by an embodiment of the present application;

[0047] Figure 5 Schematic diagram of the structure of a battery control device provided by an embodiment of the present application. Detailed implementation manners

[0048] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present application, but should not be construed as limiting the present application.

[0049] In the related art, there are problems such as unreasonable design of the liquid cooling plate structure, resulting in too large temperature differences among battery cells in different regions, or when the liquid cooling plate is arranged at the bottom of the battery pack, there may be a large temperature difference between the top and bottom regions of the battery cells. In the related art, the charge and discharge current is usually determined according to the temperature of the top electrode region of the battery cell. However, due to the unreasonable design of the liquid cooling plate or the influence of the installation position of the liquid cooling plate, there will be a large temperature difference between the electrode region temperature and other positions of the battery cell. When the temperature of a local region of the battery cell is too low and the current is still determined according to the temperature of the top electrode region, there is a risk of lithium deposition in the region with a low temperature of the battery cell.

[0050] To solve this problem, an embodiment of the present application provides a battery pack. Figure 1 Schematic diagram of the structure of a battery pack provided by an embodiment of the present application. As Figure 1 shown, the battery pack includes the following modules: a heat exchange member 10, a battery cell module 20, a first sensor 30, and a second sensor 31. Among them, the battery cell module 20 includes a plurality of battery cells 21.

[0051] The heat exchange member 10 is used to exchange heat with the plurality of battery cells 21. Optionally, the heat exchange member 10 is a liquid cooling plate.

[0052] The first sensor 30 is arranged in the output electrode region of the battery cell 21, and the second sensor 31 is arranged at a position corresponding to the inlet of the battery cell 21 and the heat exchange member 10.

[0053] In this embodiment, the output pole region is the region near the output pole of the battery cell 21. The output pole can be the pole column of a hard-shell battery cell or the electrode lead-out wire of a soft-pack battery cell, that is, the component of the battery cell 21 for outputting input electric energy. The nearby region refers to the position relatively close to the output pole, which can be on the output pole or positions such as the top cover or electrical connection piece close to the output pole.

[0054] In a possible embodiment, the first sensor 30 is arranged on the positive pole column and the negative pole column of the battery cell 21.

[0055] The second sensor 31 is arranged on the surface of the battery cell 21 close to the heat exchange member 10, that is, arranged at the position of the battery cell 21 close to the heat exchange member inlet region.

[0056] In a possible embodiment, when the heat exchange member inlet region is near the bottom of the battery cell, the second sensor 31 is arranged at the bottom of the battery cell 21.

[0057] In a possible embodiment, when the heat exchange member inlet region is near the top of the battery cell, the second sensor 31 is arranged on the top cover of the battery cell 21.

[0058] In a possible embodiment, when the heat exchange member inlet region is in the gap between adjacent battery cells, the second sensor 31 is arranged on the tab of the battery cell 21.

[0059] Optionally, both the first sensor 30 and the second sensor 31 are negative temperature coefficient (NTC) thermistors. The NTC temperature sensor is a type of thermistor and probe, and its principle is that the resistance value decreases rapidly as the temperature rises. It is usually composed of 2 or 3 metal oxides, mixed in a clay-like fluid, and sintered into a dense ceramic in a high-temperature furnace. The actual size is very flexible, and they can be as small as 0.010 inches or have a very small diameter. The maximum size has almost no limit, but it is usually applicable to less than half an inch.

[0060] In a possible embodiment, when the heat exchange member 10 cools at the bottom of the battery pack, the second sensor 31 is arranged at the position of the battery cell 21 close to the bottom and on the battery cell close to the water inlet of the battery cell 21; when the heat exchange member 10 is arranged between battery cells, the second sensor 31 is arranged on the battery cell 21 closest to the water inlet and at the position of the battery cell 21 close to the water inlet.

[0061] In a possible embodiment, the heat exchanger 10 may be composed of a cooling plate with cooling pipes, and the coolant flows through the cooling pipes to take away the heat generated by the battery cells 21 in the battery pack, ensuring that the battery cells 21 are at a normal operating temperature.

[0062] Figure 2 The following is a schematic structural diagram of a battery cell provided by an embodiment of the present application. As Figure 2 shown, on a single battery cell 21, first sensors 30 (NTC64-1 and NTC64-2) are respectively arranged at the positive and negative electrode positions, and a second sensor 31 (an additional temperature sensor NTC64-3) is arranged on the side close to the heat exchanger 10 (the bottom of the battery cell). Optionally, NTC64-3 is located at the middle position of the bottom of the battery cell 21, which can better monitor the temperature at the bottom of the battery cell 21.

[0063] In a possible embodiment, in the battery cell module, the first sensors 30 are arranged according to the following principle. Each battery cell 21 has a corresponding label. Two temperature sensors NTC (first sensors 30) are arranged at the positive and negative electrode posts of the battery cells 21 with labels 1, 8, 16, 24, 32, 40, 56, 64, 65, 72, 80, 88, 96, 104, 112, 120, and 128. That is, except for the battery cells 21 at both ends of the battery cell module, temperature sensors NTC are arranged for every 8 battery cells 21. These temperature sensors are basically on the same plane in the Z direction, and the Z-direction position tolerance is ±2 mm, which is used to collect the temperature of the battery cells and characterize the temperature of the entire battery pack based on the temperatures collected by these temperature sensors.

[0064] Then, one of the battery cells 21 is selected, and a temperature sensor NTC (second sensor 31) is arranged at its bottom. The principle of arranging this temperature sensor is as follows: When the cooling condition of the battery pack is turned on, since the heat exchanger 10 is located at the bottom of the battery cell, there will be a temperature difference in the Z direction of the battery cell, and the temperature distribution shows that the temperature at the bottom of the battery cell (close to the liquid cooling plate) is low and the temperature at the top of the battery cell (close to the NTC) is high; under different cooling conditions, the temperature difference between the top and bottom of the battery cell changes greatly, and the temperature difference between the NTC temperature near the electrode post and the temperature of the battery cell near the liquid cooling plate of all the battery cells in the entire battery pack further increases; therefore, an additional temperature sensor is arranged at the lowest position of the battery cells in the entire battery pack.

[0065] In a possible embodiment, the temperature at the bottom of the battery cell with label 64 at the edge is the lowest. Therefore, an additional temperature sensor NTC64-3 is arranged at the middle of the bottom of the battery cell with label 64.

[0066] The embodiment of the present application provides a battery control method.Figure 3 This is a schematic flowchart of a battery control method provided by an embodiment of the present application. As Figure 3 shown, the method includes the following steps:

[0067] Step 101, when cooling the plurality of battery cells, obtain a first temperature value of a first sensor and a second temperature value of a second sensor, and control the current of the plurality of battery cells according to the first temperature value and the second temperature value.

[0068] In this embodiment, the battery management system (BMS) is connected to the sensors on each battery cell in the battery pack core module through wired or wireless communication to obtain the collected temperature data. The temperature collected by the first sensor is the first temperature value, and the temperature collected by the second sensor is the second temperature value.

[0069] Determine the charge / discharge current value according to the first temperature value and the second temperature value. The BMS looks up the table according to the current temperature to obtain the determined appropriate current value, and then adjusts the current charge and discharge current value of the battery pack through some control strategies to make the battery pack operate normally, improve the safety of the battery pack, and avoid the risk of short circuit.

[0070] Optionally, determine the target current desired by the battery cell according to the first temperature value and the second temperature value. After determining the target current, compare the current of the current battery cell with the target current. If the current of the current battery cell is higher than the target current, the current of the battery pack needs to be reduced; if the current of the current battery cell is lower than the target current, the current of the battery pack needs to be increased.

[0071] Optionally, step 101 controls the current of the battery cell according to the first temperature value and the second temperature value, including:

[0072] In response to the difference between the first temperature value and the second temperature value being greater than a first preset value, determine the target current of the battery cell according to the second temperature value and the first preset value.

[0073] In this embodiment, the first preset value is the threshold of the temperature difference. When the temperature difference between the temperature of the output pole region of the battery cell and the temperature of the position corresponding to the inlet of the heat exchange member of the battery cell ≥ ΔT (such as ΔT = 15 °C), charge and discharge according to the current corresponding to the temperature of the output pole region, and lithium plating may occur in the battery cell; lithium plating is an irreversible process, and lithium dendrites will adhere to the surface of the diaphragm in the battery cell for a long time, which may pierce the diaphragm, cause an internal short circuit in the battery cell, and cause serious accidents such as thermal runaway, fire, and explosion of the battery cell. By arranging an additional second sensor and combining control strategies, the lithium plating phenomenon during charging of the battery cell can be effectively reduced.

[0074] If the difference between the first temperature value and the second temperature value is greater than a first preset value, it indicates that the difference between the first temperature value and the second temperature value exceeds a reasonable range, that is, the temperature difference between the area near the inlet of the heat exchanger and the electrode of the battery cell is relatively large. It is not suitable to use the first temperature value to look up the table to determine the current that the current battery cell is expected to reach. Instead, it is necessary to use the second temperature value and the first preset value to look up the table to calculate the current value that the current battery cell is expected to reach.

[0075] In this embodiment, the method of looking up the table is used to determine the expected current value. The table reflects the mapping relationship from temperature and state of charge (SOC) to current. The state of charge of the battery refers to the available state of the remaining charge in the battery, generally represented by a percentage. Each combination of SOC-temperature in the table uniquely corresponds to a current value.

[0076] Optionally, the first preset value is determined by at least one of the chemical system of the battery cell, the size, and the heat exchange capacity of the heat exchanger.

[0077] In a possible embodiment, the first preset value is 15°C.

[0078] Optionally, the step 101 controls the current of the battery cell according to the first temperature value and the second temperature value, including:

[0079] In response to the difference between the first temperature value and the second temperature value being less than the first preset value, the target current of the battery cell is determined according to the first temperature value.

[0080] In this embodiment, if the difference between the first temperature value and the second temperature value is less than the first preset value, it indicates that the difference between the first temperature value and the second temperature value is within a reasonable range, that is, the temperature difference between the area near the inlet of the heat exchanger and the electrode of the battery cell is relatively small. It is suitable to use the first temperature value to look up the table to determine the current value that the current battery cell is expected to reach.

[0081] Optionally, the step 101 controls the current of the battery cell according to the first temperature value and the second temperature value, including:

[0082] Obtain the first temperature values of multiple first sensors, and take the maximum value of the first temperature values for comparison with the second sensor to determine the target current of the battery cell.

[0083] In this embodiment, when monitoring the first temperature values of multiple first sensors, it is necessary to take the maximum value among them for comparison with the second sensor. If the temperature difference between the maximum value and the second temperature value of the second sensor is within a reasonable range (less than or equal to the first preset value), it indicates that the temperatures of other battery cells are all normal temperatures, and it is suitable to look up the table using the maximum value of the first temperature value to determine the current value that the current battery cell is expected to reach; if the temperature difference between the maximum value and the second temperature value of the second sensor is outside the reasonable range (greater than the first preset value), it indicates that the operating temperature of the battery cell is abnormal, and it is necessary to look up the table using the second temperature value and the first preset value to calculate the current value that the current battery cell is expected to reach.

[0084] Optionally, the method further includes:

[0085] In response to the existence of multiple first temperature values, and at least one of the first temperature values being greater than the second preset value, cooling is turned on.

[0086] In this embodiment, a cooling decision is made based on the first temperature value and the second preset value, where the cooling decision is used to adjust the temperature of the battery pack. When making the cooling decision, a robust method is adopted for decision-making. Even if only the temperature of one battery cell is high and needs to be cooled, cooling should be turned on to cool down the battery pack. The process of determining the target current of the battery cell when cooling is turned on is as described above.

[0087] Optionally, the method further includes:

[0088] In response to the existence of multiple first temperature values, and at least one of the first temperature values being less than the second preset value, heating is turned on;

[0089] The target current of the battery cell is determined according to the minimum value among the first temperature values.

[0090] In this embodiment, when making the cooling decision, a robust method is adopted for decision-making. Even if only the temperature of one battery cell is low and needs to be heated, heating should be turned on to heat up the battery pack. The process of determining the target current of the battery cell when heating is turned on is as follows: Look up the corresponding table of temperature and current according to the minimum value among the first temperature values to determine the target current that the battery cell is expected to reach.

[0091] Under the heating condition, if the position corresponding to the inlet of the heat exchange member near the battery cell is the bottom of the battery cell, hereinafter it will be described with the heat exchange member located at the bottom of the battery cell. Then the temperature at the bottom of the battery cell is high, and the temperature at the position of the output pole region of the battery cell is low. The lower the temperature, the smaller the corresponding current, that is, the bottleneck of the current lies in the temperature (the first temperature value) of the output pole region of the battery cell. The high temperature at the bottom of the battery cell allows a large charging current, and the battery cell will not have the risk of lithium plating.

[0092] Optionally, the method further includes:

[0093] In response to the first temperature value being less than a second preset value and greater than a third preset value, cooling or heating is not turned on;

[0094] Determine the target current of the battery cell according to the average value of the first temperature values.

[0095] In this embodiment, a robust method is adopted for decision-making during cooling decision-making. If all the first temperature values are less than the second preset value and greater than the third preset value, cooling or heating is not required. At this time, the process of determining the target current of the battery cell is as follows: Query the corresponding table of temperature and current according to the average value of the first temperature values to determine the target current that the desired battery cell reaches.

[0096] In this embodiment, three temperature ranges are determined according to the second preset value and the third preset value. In the lower temperature range, the battery cell needs to be heated to increase the temperature of the battery pack. In the higher temperature range, the battery cell needs to be cooled to reduce the temperature of the battery pack. In this embodiment, the third temperature threshold is greater than the second temperature threshold.

[0097] The embodiment of the present application provides a battery control method, Figure 4 which is a schematic flowchart of a battery control method provided by the embodiment of the present application. As Figure 4 shown, the method includes the following steps:

[0098] Step 801: The BMS collects the first temperature value T_n through the first sensor, where the value range of n is [1, N], and N is the number of battery cells (i.e., battery monomers), and at the same time collects the second temperature value M_0 of the additionally arranged second sensor.

[0099] Step 802: Compare each first temperature value T_n with the cooling start temperature Tmax_0 (the above-mentioned second preset value) and the heating start temperature Tmin_0 (the above-mentioned third preset value). Optionally, Tmax_0 = 32 °C and Tmin_0 = 10 °C

[0100] Step 803a: If the temperature T_n of the NTC ≥ Tmax_0, turn on the cooling. Optionally, turn on the cooling when T_n = 40 °C.

[0101] Step 804: Further compare the maximum temperature Tmax (the maximum value of the above-mentioned first temperature values) in T_n with the temperature M_0 + ΔT (the first preset value) collected by the temperature sensor. For example, ΔT = 15 °C;

[0102] Step 805a: If Tmax ≤ M_0 + ΔT_0, the BMS temperature variable T = Tmax(T_1, … T_N); Since the charge and discharge operating current is a function of the battery temperature T and SOC, further, the desired current value (i.e., the target current) I = f(T, SOC) at this moment under this operating condition is obtained by querying the table of the temperature-current mapping relationship.

[0103] Step 805b: If Tmax > M_0 + ΔT_0, then determine T = M_0 + ΔT, and the current value I = f(T, SOC); that is, the current desired value cannot be obtained by looking up the table according to the temperature corresponding to T = Tmax(T_1, … T_N), but by looking up the table according to the temperature corresponding to T = M_0 + ΔT.

[0104] Step 803b: If the temperature Tmin_0 ≤ T_n < Tmax_0 of all NTCs, neither cooling nor heating is turned on. Optionally, when all T_n are 25°C, neither cooling nor heating is turned on.

[0105] Step 806: Neither the cooling nor the heating function is turned on. At this time, the temperature T corresponding to the current is the average value of each first sensor, that is, T = Avra(T_1, … T_N), and the current desired value is I = f(T, SOC).

[0106] Step 803c: If the temperature T_n of any NTC is less than Tmin_0, heating is turned on. Optionally, when there is T_n = 0°C, heating is turned on.

[0107] Step 807: After heating is turned on, T = Tmin(T_1, … T_N), and the current desired value is I = f(T, SOC).

[0108] In this embodiment, the second sensor can be understood as a redundant temperature sensor, which is only used when the battery cooling is turned on; when the battery is heated or when the battery cooling / heating is not turned on, the second sensor does not participate in the temperature judgment logic; Reason: In the heating condition, if the position corresponding to the inlet of the heat exchanger near the battery cell is the bottom of the battery cell, hereinafter described with the heat exchanger located at the bottom of the battery cell, the bottom of the battery cell contacts the liquid cooling plate, the bottom temperature is high, and the temperature at the NTC position on the top is low. The lower the temperature, the smaller the corresponding current, that is, the bottleneck of the current lies in the NTC temperature at the pole column. The high temperature at the bottom of the battery cell allows a large charging current, and there is no risk of lithium plating at the bottom of the battery cell. Therefore, the second sensor does not participate in the temperature logic judgment; in the condition of not turning on cooling / heating, the temperature difference between the top and bottom of the battery cell is small, so the second sensor does not need to participate in the temperature judgment logic either.

[0109] When the battery temperature is ≤50℃, the battery charge and discharge current limit is generally positively correlated with the battery temperature, that is, the higher the battery temperature, the greater the allowed charge and discharge current; if there is no temperature sensor or the second sensor, the charging current will be controlled according to the battery cell pole temperature; when the temperature difference between the battery cell pole temperature and the battery cell bottom temperature is ≥ΔT (such as ΔT=15℃), the battery cell lithium deposition phenomenon will appear at the bottom of the battery cell; lithium deposition is an irreversible process, and lithium dendrites will be attached to the surface of the diaphragm inside the battery cell for a long time, which may pierce the diaphragm and cause a short circuit in the battery cell, resulting in serious accidents such as thermal runaway, fire, and explosion of the battery cell. Therefore, lithium deposition is a situation that needs to be avoided as much as possible when the battery cell is working. By arranging additional temperature sensors and combining control strategies, the phenomenon of lithium deposition of battery cells during charging can be effectively avoided.

[0110] In order to implement the above embodiments, the present application also proposes a battery control device. Figure 5 This is a schematic diagram of the structure of a battery control device provided in an embodiment of the present application. Figure 5 As shown, the device comprises:

[0111] The present application also provides a battery control device, Figure 5 This is a schematic diagram of the structure of a battery control device provided in an embodiment of the present application. Figure 5 As shown, the device comprises the following steps:

[0112] The battery management module 510 is used to obtain a first temperature value of the first sensor and a second temperature value of the second sensor when cooling the plurality of battery cells, and control the current of the battery cells according to the first temperature value and the second temperature value.

[0113] The collection, storage, use, processing, transmission, provision and disclosure of user personal information involved in this application are in compliance with relevant laws and regulations and do not violate public order and good morals.

[0114] It should be noted that personal information from users should be collected for legitimate and reasonable purposes and should not be shared or sold outside of these legitimate uses. In addition, such collection / sharing should be carried out after receiving the user's informed consent, including but not limited to notifying the user to read the user agreement / user notice and sign the agreement / authorization including authorization of relevant user information before the user uses the function. In addition, any necessary steps should be taken to protect and safeguard access to such personal information data and ensure that others who have access to personal information data comply with its privacy policy and procedures.

[0115] This application is expected to provide an implementation scheme for users to selectively block the use or access of personal information data. That is, the present disclosure is expected to provide hardware and / or software to prevent or block access to such personal information data. Once the personal information data is no longer needed, the risk can be minimized by restricting data collection and deleting the data. In addition, when applicable, personal identifiers are removed from such personal information to protect the privacy of users.

[0116] In the description of the foregoing embodiments, the descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0117] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present application, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0118] Any process or method description shown in the flowchart or described in other ways herein can be understood as representing a module, segment, or part of code including one or more executable instructions for implementing a customized logic function or process, and the scope of the preferred embodiments of the present application includes additional implementations, where the functions may be executed in a substantially simultaneous manner or in a reverse order according to the functions involved, rather than in the order shown or discussed, which should be understood by those skilled in the art to which the embodiments of the present application belong.

[0119] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a definite sequence list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor, or other systems that can fetch and execute instructions from the instruction execution system, apparatus, or device), or used in conjunction with these instruction execution systems, apparatus, or devices. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by or in conjunction with an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include the following: an electrical connection portion having one or more wirings (electronic device), a portable computer diskette (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium can even be paper or other suitable media on which the program can be printed, because the program can be obtained electronically, for example, by optically scanning the paper or other media, followed by editing, interpretation, or otherwise processing as appropriate, and then storing it in a computer memory.

[0120] It should be understood that various parts of the present application can be implemented by hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or a combination of the following techniques well known in the art can be used: discrete logic circuits having logic gate circuits for implementing logical functions on data signals, application specific integrated circuits having appropriate combinational logic gate circuits, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), etc.

[0121] Those of ordinary skill in the art of this technology can understand that all or part of the steps carried by the method of implementing the above embodiments can be completed by instructing relevant hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiments.

[0122] In addition, each functional unit in various embodiments of the present application may be integrated into one processing module, or each unit may exist physically alone, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. When the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0123] The above-mentioned storage medium may be a read-only memory, a magnetic disk, an optical disc, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A battery pack, characterized in that, Comprising: a heat exchange component, a plurality of battery cells, a first sensor, and a second sensor; the heat exchange component is configured to exchange heat with the plurality of battery cells; the first sensor is arranged in the output pole region of the battery cell, and the second sensor is arranged at a position corresponding to the inlet of the plurality of battery cells and the heat exchange component.

2. A battery control method, characterized in that, Applied to the heat exchange component described in claim 1, comprising the following steps: When cooling the plurality of battery cells, obtain a first temperature value of the first sensor and a second temperature value of the second sensor, and control the current of the battery cell according to the first temperature value and the second temperature value.

3. The method according to claim 2, characterized in that The controlling the current of the battery cell according to the first temperature value and the second temperature value includes: In response to the difference between the first temperature value and the second temperature value being greater than a first preset value, determine the target current of the battery cell according to the second temperature value and the first preset value.

4. The method according to claim 3, characterized in that The first preset value is determined by at least one of the chemical system of the battery cell, the size, and the heat exchange capacity of the heat exchange component.

5. The method according to claim 2, wherein The controlling the current of the battery cell according to the first temperature value and the second temperature value includes: In response to the difference between the first temperature value and the second temperature value being less than the first preset value, determine the target current of the battery cell according to the first temperature value.

6. The method according to any one of claims 3-5, characterized in that, The controlling the current of the battery cell according to the first temperature value and the second temperature value includes: Obtain the first temperature values of the plurality of first sensors, take the maximum value of the first temperature values and compare it with the second sensor to determine the target current of the battery cell.

7. The method according to any one of claims 3 to 5, characterized in that The method further includes: In response to there being a plurality of the first temperature values and at least one of the first temperature values being greater than a second preset value, turn on the cooling.

8. The method according to claim 2, characterized in that The method further includes: In response to there being a plurality of the first temperature values and at least one of the first temperature values being less than a second preset value, turn on the heating; Determine the target current of the battery cell according to the minimum value of the first temperature values.

9. The method according to claim 2, wherein The method further includes: In response to the first temperature value being less than the second preset value and greater than a third preset value, do not turn on the cooling or heating; Determine the target current of the battery cell according to the average value of the first temperature values.

10. A battery control device, characterized in that, Comprising: a battery management module, configured to obtain a first temperature value of the first sensor and a second temperature value of the second sensor when cooling the plurality of battery cells, and control the current of the battery cell according to the first temperature value and the second temperature value.

11. An electronic device, characterized in that, Comprising: a processor, and a memory communicatively connected to the processor; the memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory to implement the method described in any one of claims 2-8.

12. A computer-readable storage medium, characterized in that, Computer-executable instructions are stored in the computer-readable storage medium, and when the computer-executable instructions are executed by the processor, they are used to implement the method described in any one of claims 2-8.

13. A battery pack, characterized in that, Comprising a battery management system, wherein the battery management system is configured to execute the method described in any one of claims 2-9.

14. A vehicle, characterized in that, Comprising the battery pack described in claim 13.

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