Battery module, exception handling method and electronic equipment

Abstract

The invention provides a battery module, an exception handling method and electronic equipment. The battery module comprises a plurality of single batteries; the plurality of single batteries are arranged along a first direction and a second direction of the battery module; a first isothermal interface of the battery module intersects with the first surface to form a first part, the first surface is a top surface formed by the plurality of arranged battery monomers, a plurality of sensors are arranged on the first part at intervals, and the temperature on the first isothermal interface is in a first temperature interval. According to the battery module, the exception handling method and the electronic equipment provided by the embodiment of the invention, the plurality of isothermal interfaces are divided in the battery module, the plurality of sensors are arranged on the isothermal interfaces, and the plurality of sensors can be mutually replaced, so that the fault reporting rate of the battery module is reduced, and the normal estimation of the battery state and the battery performance is ensured as much as possible.

Description

Technical Field

[0001] The present application relates to the field of power batteries, and more specifically, to a battery module, an abnormality handling method and an electronic device. Background Art

[0002] As the power source of new energy vehicles, power batteries are usually equipped with multiple sensors. The data collected by the sensors can be used to estimate the battery status and performance. The normal estimation of the battery status and battery performance of the power battery affects the vehicle's driving and charging and discharging processes. Whether the sensor can effectively collect data is the key to estimating the battery status and battery performance. If the sensor is invalid, the sensor is usually repaired and replaced.

[0003] Therefore, how to ensure the normal estimation of battery status and battery performance as much as possible while reducing the failure rate of electronic equipment is a problem that needs to be solved urgently. Summary of the invention

[0004] The present application provides a battery module, an abnormality handling method and an electronic device, the purpose of which is to reduce the fault reporting rate of the electronic device while ensuring the normal estimation of the battery status and battery performance as much as possible.

[0005] In a first aspect, a battery module is provided, which includes a plurality of battery cells; the plurality of battery cells are arranged along a first direction and a second direction of the battery module; a first isothermal interface of the battery module intersects a first portion with a first surface, the first surface being a top surface formed by the plurality of battery cells after arrangement, a plurality of sensors being arranged on the first portion at intervals, and a temperature on the first isothermal interface being in a first temperature range.

[0006] It should be noted that the first part of the intersection of the isothermal interface and the first surface can be a straight line or a curve. The temperature corresponding to the isothermal interface can be calculated by thermal simulation technology to calculate the accumulation of heat of the battery module during the charging and discharging process.

[0007] Based on the above solution, by dividing the isothermal interface in the battery module and setting multiple sensors on the isothermal interface, when there is an invalid sensor on a certain isothermal interface, other valid sensors can be used to replace the invalid sensor to collect battery status parameters, thereby reducing the fault reporting rate of the battery module and ensuring the normal estimation of the battery status and battery performance as much as possible.

[0008] In combination with the first aspect, in certain implementations of the first aspect, the battery module also includes a second isothermal interface, the second isothermal interface intersects with the first surface at a second portion, a plurality of sensors are arranged at intervals on the second portion, the temperature on the second isothermal interface is in a second temperature range, and the first temperature region is different from the second temperature range.

[0009] Exemplarily, the second portion may be similar to the first portion, and may be a straight line or a curve.

[0010] Based on the above scheme, the battery module can be divided into two isothermal interfaces, and multiple sensors are set at intervals on each isothermal interface, so that more battery status parameters on the isothermal interface can be collected, thereby better estimating the battery status and battery performance. The temperature on each isothermal interface is in a different temperature range, and multiple sensors on each isothermal interface can replace each other. When a sensor on an isothermal interface is invalid, the temperature of the isothermal interface can also be collected through other valid sensors.

[0011] In combination with the first aspect, in certain implementations of the first aspect, the battery module also includes a third isothermal interface, the third isothermal interface intersects a third part with the first surface, a plurality of sensors are arranged at intervals on the third part, the temperature on the third isothermal interface is in a third temperature range, and the first temperature range, the second temperature range and the third temperature range are different.

[0012] Based on the above solution, more isothermal interfaces can be divided in the battery module, and multiple sensors are arranged at intervals on each isothermal interface, so that battery status parameters on more isothermal interfaces can be collected, thereby better estimating the battery status and battery performance.

[0013] In combination with the first aspect, in certain implementations of the first aspect, a difference between the first temperature interval and the second temperature interval is equal to a difference between the second temperature interval and the third temperature interval.

[0014] Based on the above solution, the battery module can divide the isothermal interface according to a certain temperature range gradient, so that the sensor can collect more battery status parameters under working conditions to more accurately estimate the battery status and battery performance.

[0015] In combination with the first aspect, in certain implementations of the first aspect, the first temperature interval is less than or equal to a first temperature threshold, the third temperature interval is greater than or equal to a second temperature threshold, and the second temperature threshold is greater than the first temperature threshold.

[0016] Exemplarily, the first isothermal interface is the lowest temperature interface, and the third isothermal interface is the highest temperature interface.

[0017] Based on the above solution, the battery module includes at least a lowest temperature interface and a highest temperature interface, so that the sensor at least collects the lowest temperature and the highest temperature of the battery module under charging and discharging conditions, thereby ensuring the safe use of the battery module.

[0018] In combination with the first aspect, in some implementations of the first aspect, the sensor is disposed at the location of the sensor by laser welding or ultrasonic welding.

[0019] Based on the above solution, connecting by laser welding or ultrasonic welding is beneficial to ensure the reliability of the connection between the sensor and the battery cell.

[0020] In combination with the first aspect, in certain implementations of the first aspect, the battery cell is one of the following: a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, or a magnesium-ion battery.

[0021] In a second aspect, an electronic device is provided, comprising a battery module as in the first aspect and any possible implementation thereof, the electronic device being configured to perform the following steps: determining whether there is a valid sensor on the first isothermal interface, the valid sensor being a sensor in a normal working state; if the valid sensor exists on the first isothermal interface, the electronic device maintains normal operation.

[0022] It should be understood that the battery status parameters collected by the sensor in normal working state can be used to estimate the working state of the battery module. The battery module in the electronic device includes a first isothermal interface, and the first isothermal interface includes multiple sensors. There may be valid sensors or invalid sensors among the multiple sensors. The multiple sensors can replace each other. If there is a valid sensor on the first isothermal interface, it means that at least one valid sensor is set on the first isothermal interface and can work normally. There is no need to perform abnormal processing on the battery module, and the electronic device can maintain normal operation.

[0023] Based on the above solution, by dividing the isothermal interface in the battery module and setting multiple sensors on the isothermal interface, the multiple sensors on the same isothermal interface are used to collect the temperature on the isothermal interface. If there is an invalid sensor, as long as there is a sensor that can work normally among the multiple sensors on the isothermal interface, the invalid sensor can be replaced by the sensor to collect the battery status parameters, without reporting the fault immediately, which reduces the fault reporting rate of the battery module and can also ensure the normal estimation of the battery status and battery performance as much as possible.

[0024] In combination with the second aspect, in certain implementations of the second aspect, the electronic device is used to perform the following steps: determine the number of invalid sensors on the first isothermal interface, the invalid sensors being sensors in an abnormal working state; if the number of invalid sensors on the first isothermal interface is greater than or equal to a first threshold, perform first level exception processing.

[0025] It should be noted that an invalid sensor is a sensor that processes an abnormal working state. The battery status parameters collected by the sensor in the abnormal working state may lead to an incorrect estimation of the working state of the battery module.

[0026] Exemplarily, the first level abnormality handling method is to prohibit charging and discharging of the battery module. If the number of invalid sensors on the first isothermal interface is greater than or equal to the first threshold, charging and discharging of the battery module in the electronic device is prohibited.

[0027] It should be understood that the first threshold is related to the number of sensors arranged on the first isothermal interface.

[0028] For example, when three sensors are arranged on the first isothermal interface, the first threshold may be set to 3. If the number of invalid sensors on the first isothermal interface is equal to 3, it means that there is no valid sensor on the first isothermal interface, and charging and discharging of the battery module in the electronic device is prohibited.

[0029] For another example, when four sensors are provided on the first isothermal interface, the first threshold may be set to 4. If the number of invalid sensors on the first isothermal interface is equal to 4, it means that there is no valid sensor on the first isothermal interface, and charging and discharging of the battery module in the electronic device is prohibited.

[0030] It should be understood that the specific conditions for triggering the first level exception handling can be adjusted by setting the first threshold with different values.

[0031] For example, if four sensors are set on the first isothermal interface, if the first threshold is set to 4, it means that when there are no valid sensors on the first isothermal interface, the first level exception handling method will be executed; if the first threshold is set to 2, it means that as long as there are two or more invalid sensors on the first isothermal interface, the first level exception handling method will be executed. Obviously, when the first threshold is set to 2, the specific conditions of the first isothermal exception handling may be more easily triggered.

[0032] In combination with the second aspect, in certain implementations of the second aspect, the battery module also includes multiple isothermal interfaces, and the electronic device is used to perform the following steps: determine the number of the isothermal interfaces that meet the first condition, and the first condition is that there are no valid sensors on the isothermal interface; if the number of the isothermal interfaces that meet the first condition is greater than or equal to a second threshold, perform second level exception processing.

[0033] Exemplarily, the second level abnormality handling may be the same as the first level abnormality handling, which is to prohibit charging and discharging of the battery module.

[0034] It should be noted that the second threshold is related to the number of isothermal interfaces in the battery module.

[0035] For example, the battery module includes 6 isothermal interfaces, namely isothermal interface 1, isothermal interface 2, isothermal interface 3, isothermal interface 4, isothermal interface 5 and isothermal interface 6. Three sensors are arranged on each isothermal interface. The second threshold is preset to 4. If there are no valid sensors on the 6 isothermal interfaces, charging and discharging of the battery module is prohibited.

[0036] In combination with the second aspect, in certain implementations of the second aspect, the electronic device is further used to perform the following steps: if the number of isothermal interfaces that meet the first condition is less than the second threshold, perform third level exception processing.

[0037] Exemplarily, the third level of abnormality handling is to limit the charge and discharge power of the battery module.

[0038] For example, the battery module includes 6 isothermal interfaces, namely isothermal interface 1, isothermal interface 2, isothermal interface 3, isothermal interface 4, isothermal interface 5 and isothermal interface 6. Three sensors are set on each isothermal interface. The second threshold is preset to 4. If only isothermal interface 1 and isothermal interface 2 do not have valid sensors, and valid sensors exist on other isothermal interfaces, the charge and discharge power of the battery module can be limited.

[0039] Based on the above scheme, when there are effective sensors on certain isothermal interfaces in the battery module, it is only necessary to limit the charge and discharge power of the battery module. This can not only ensure the normal estimation of the battery status and battery performance as much as possible, but also improve the fault tolerance of electronic equipment.

[0040] In combination with the second aspect, in some implementations of the second aspect, the first isothermal interface includes three sensors, the three sensors include a first sensor, a second sensor and a third sensor, and the determination of whether there is a valid sensor on the first isothermal interface is specifically: obtaining the temperature value of the first sensor, the temperature value of the second sensor and the temperature value of the third sensor; determining a first temperature difference according to the temperature value of the first sensor and the temperature value of the second sensor; determining a second temperature difference according to the temperature value of the first sensor and the temperature value of the third sensor; determining a third temperature difference according to the temperature value of the second sensor and the temperature value of the third sensor; when the first temperature difference, the second temperature difference and the third temperature difference are less than or equal to a third threshold, determining that the three sensors are valid sensors; when the first temperature difference is less than or equal to the third threshold and the second temperature difference and the third temperature difference are greater than the third threshold, determining that the first sensor and the second sensor are the valid sensors.

[0041] It should be noted that before determining the abnormality handling method, it is necessary to determine in turn whether the isothermal interface in the battery module includes a valid sensor.

[0042] It can be understood that the temperatures collected by multiple sensors set on the same isothermal interface should be roughly the same. If the temperature difference is greater than a certain threshold, it means that there may be invalid sensors. Based on this, invalid sensors and valid sensors can be determined according to the temperature difference values ​​collected by each sensor.

[0043] For example, the third threshold is set to 1°C. Sensor A1, sensor A1 and sensor A3 are arranged on the isothermal interface 1. The temperature value of sensor A1 is 30°C, the temperature value of sensor A2 is 30.5°C, and the temperature value of sensor A3 is 30.2°C. Among them, the temperature difference between the temperature value of sensor A1 and the temperature value of sensor A2 is 0.5°C, that is, the first temperature difference is less than the third threshold; the temperature difference between the temperature value of sensor A1 and the temperature value of sensor A3 is 0.2°C, that is, the second temperature difference is less than the third threshold; the temperature difference between the temperature value of sensor A2 and the temperature value of sensor A3 is 0.3°C, that is, the third temperature difference is less than the third threshold. It can be seen that the temperature difference between the temperatures of the three sensors on the isothermal interface 1 does not exceed the third threshold, indicating that there are valid sensors (including sensor A1, sensor A2 and sensor A3) on the isothermal interface 1.

[0044] For another example, the third threshold is set to 1°C. Sensor A1, sensor A1 and sensor A3 are arranged on the isothermal interface 1. The temperature value of sensor A1 is 30°C, the temperature value of sensor A2 is 30.5°C, and the temperature value of sensor A3 is 35°C. Among them, the temperature difference between the temperature value of sensor A1 and the temperature value of sensor A2 is 0.5°C, that is, the first temperature difference is less than the third threshold; the temperature difference between the temperature value of sensor A1 and the temperature value of sensor A3 is 5°C, that is, the second temperature difference is greater than the third threshold; the temperature difference between the temperature value of sensor A2 and the temperature value of sensor A3 is 4.5°C, that is, the third temperature difference is greater than the third threshold. It can be seen that there are valid sensors (including sensor A1 and sensor A2) on the isothermal interface 1, and the invalid sensor is A3. Sensor A1 and sensor A2 can replace sensor A3 as valid sensors.

[0045] In combination with the second aspect, in some implementations of the second aspect, the electronic device is further used to perform the following steps: when the first temperature difference, the second temperature difference, and the third temperature difference are greater than the third threshold, determine that the three sensors are the invalid sensors.

[0046] For example, the third threshold is set to 1°C. Sensor A1, sensor A1 and sensor A3 are arranged on the isothermal interface 1. The temperature value of sensor A1 is 30°C, the temperature value of sensor A2 is 25°C, and the temperature value of sensor A3 is 35°C. Among them, the temperature difference between the temperature value of sensor A1 and the temperature value of sensor A2 is 5°C, that is, the first temperature difference is greater than the third threshold; the temperature difference between the temperature value of sensor A1 and the temperature value of sensor A3 is 5°C, that is, the second temperature difference is greater than the third threshold; the temperature difference between the temperature value of sensor A2 and the temperature value of sensor A3 is 10°C, that is, the third temperature difference is greater than the third threshold. It can be seen that the temperature difference between the temperatures of the three sensors on the isothermal interface 1 exceeds the third threshold, then it is impossible to determine the invalid sensor, and it is also impossible to determine whether there is a valid sensor on the isothermal interface. In the case where the valid sensor on the isothermal interface cannot be determined, it is considered that there is no valid sensor on the isothermal interface.

[0047] In the second aspect, in some implementations of the second aspect, the electronic device may be a vehicle terminal, or a mobile phone terminal, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a structural schematic diagram of a battery module provided in an embodiment of the present application.

[0049] Figure 2 It is a structural schematic diagram of a battery module provided in an embodiment of the present application.

[0050] Figure 3 It is a structural schematic diagram of a battery module provided in an embodiment of the present application.

[0051] Figure 4 It is a structural schematic diagram of a battery module provided in an embodiment of the present application.

[0052] Figure 5 It is a schematic flowchart of an exception handling method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0053] In order to facilitate understanding of the embodiments of the present application, the following points are explained before introducing the embodiments of the present application.

[0054] In the description of the embodiments of the present application, "connection" refers not only to the ability to achieve mechanical or physical connection in the structure, but also to the ability to achieve connection. "Connection" can be understood as the physical contact and electrical conduction of components; it can also be understood as the connection between different components in the circuit structure through physical lines such as wires that can transmit electrical signals; it can also be understood as electrical conduction through the air through indirect coupling. Among them, it can be understood by those skilled in the art that the coupling phenomenon refers to the phenomenon that there is close cooperation and mutual influence between the input and output of two or more circuit elements or electrical networks, and energy is transmitted from one side to the other through interaction.

[0055] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or. For example, A / B can mean A or B. The “and / or” in this article is merely a way to describe the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0056] In the embodiments of the present application, the terms "first" and "second" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first" and "second" may sensibly or implicitly include one or more features. In addition, in the description of the embodiments of the present application, "multiple" refers to two or more than two, "at least one" and "one or more" refer to one, two or more. The singular expressions "one", "a kind of", "said", "above", "the" and "this" are intended to also include expressions such as "one or more", unless there is a clear indication to the contrary in the context.

[0057] References to "one embodiment" or "some embodiments" etc. described in this specification mean that a particular feature, structure or characteristic described in conjunction with the embodiment is included in one or more embodiments of the present application. Thus, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear at different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0058] In the embodiments of the present application, the same reference numerals are used to represent the same components or parts. For the same parts in the embodiments of the present application, only one of the parts or parts may be marked with a reference numeral in the figure. It should be understood that the reference numerals are also applicable to other identical parts or parts. In addition, the various parts in the drawings are not drawn to scale, and the sizes and dimensions of the parts shown in the drawings are only exemplary and should not be understood as limiting the present application.

[0059] The embodiment of the present application defines the coordinate system of the accompanying drawings. The x-direction, y-direction and z-direction are perpendicular to each other. The z-direction can be understood as the thickness direction of the battery module, the x-direction can be understood as the length direction of the battery module, and the y-direction can be understood as the width direction of the battery module; or, the x-direction can also be understood as the width direction of the battery module, and the y-direction can be understood as the length direction of the battery module. It can be understood that, for the convenience of expression, in the embodiment of the present application, the x-direction is taken as the width direction of the battery module and the y-direction is taken as the length direction of the battery module. It can also be understood that, for the convenience of expression, in the embodiment of the present application, the x-direction, the y-direction and the z-direction can also be referred to as the first direction, the second direction and the third direction, respectively.

[0060] To facilitate understanding of the battery module provided in the embodiments of the present application, the application scenarios of the battery module provided in the embodiments of the present application are described below.

[0061] The battery module provided in the embodiment of the present application is applied to a vehicle. The vehicle involved in the embodiment of the present application may be a vehicle suitable for being driven by an electric drive. The vehicle may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle (pure electric vehicle / battery electric vehicle, pureEV / battery EV), a hybrid electric vehicle (hybrid electric vehicle, HEV), an extended-range electric vehicle (rangeextended electric vehicle, REEV) or a plug-in hybrid electric vehicle (plug-in hybrid electric vehicle, PHEV), etc. For ease of description and understanding, the embodiment of the present application is described by taking the vehicle as a new energy vehicle as an example.

[0062] Figure 1 The schematic diagram of the structure of a battery module 10 provided in an embodiment of the present application is shown. The battery module may be a power battery module applied to new energy vehicles.

[0063] The battery module 10 may include a housing 11 , a plurality of battery cells 12 , and a plurality of sensors 13 .

[0064] The box body 11 may be a hollow structure, and a plurality of battery cells 12 may be accommodated in the box body 11 and arranged along the x and y directions of the battery module. A plurality of sensors 13 may be evenly arranged in the box body 11 , and the sensors 13 may be connected to the battery cells 12 .

[0065] The battery cell 12 may be a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery or a magnesium-ion battery, etc., which is not limited in the embodiments of the present application. It is understood that the specific number of battery cells 12 can be adjusted according to power demand, which is not limited in the present application. Multiple battery cells 12 can be connected in series, in parallel or in a mixed manner to achieve a larger capacity or power.

[0066] A plurality of sensors 13 are arranged on the surface of the battery cell. The plurality of sensors 13 are evenly distributed in the area where the surface of the battery cell is located. The sensors are used to collect battery status parameters, which are used to determine the state of the battery module. Exemplarily, the battery status parameters include temperature, pressure, etc. In other words, the sensors are used to collect battery status parameters such as battery temperature and pressure on the surface of the battery cell.

[0067] It should be noted that each sensor is evenly arranged in the battery module according to the “equal area”, for example Figure 1 As shown, the multiple sensors 13 can be arranged along the x direction of the battery module, with one sensor being arranged every battery cell 12; or along the y direction of the battery module, with one sensor being arranged every three battery cells 12. Figure 1 The arrangement of the multiple sensors 13 shown in the figure is only an example. The sensors can be arranged more densely or sparsely according to actual detection needs, and each sensor can sample independently.

[0068] During the charging or discharging process of the battery module, heat will be generated, causing the battery module temperature to rise. When the battery module temperature is too high or too low, it will affect the health of the battery module. Therefore, it is necessary to collect the temperature information of the battery module through sensors. When the temperature is abnormal, measures can be taken in time to repair the battery module to avoid affecting the working state of the battery module for a long time.

[0069] If one of the multiple sensors is abnormal, the temperature information of the sampling area where the sensor is located cannot be accurately obtained, which may cause temperature sampling failure and / or temperature exceeding the threshold value and other fault phenomena, thereby affecting the normal operation of the battery module. To avoid the above problems, generally speaking, the battery module can determine the specific method of handling sensor abnormalities according to the abnormal situation of the sensor and the fault list.

[0070] It should be understood that the fault list is used to indicate the correspondence between the abnormal state of the sensor and the abnormal handling method. Specifically, the abnormal state of the sensor is set to different fault levels (for example, a primary fault, a secondary fault, etc.). The higher the fault level, the more serious the fault, and a more stringent abnormal handling method will be adopted. Among them, the triggering conditions for different fault levels are different. For example, a single sensor failure triggers a primary fault; greater than or equal to two sensor failures trigger a secondary fault. The abnormal handling methods for the primary fault include limiting the charging power and limiting the discharging power; the abnormal handling methods for the secondary fault include prohibiting charging and prohibiting discharging.

[0071] based on Figure 1 From the battery module 10 shown, and the exception handling method applicable to the battery module 10, it can be seen that the reliability of a battery module 10 is related to the reliability of the sensor, that is, the reliability of the battery module is related to whether the sensor fails (or is abnormal, faulty). Assume that the reliability of each sensor is R, and the failure rate (or failure rate) is 1-R, where R is greater than or equal to 0 and less than or equal to 1. When R is 0, it means that the reliability of the sensor is 0, that is, the sensor will fail 100%; when R is 1, it means that the reliability of the sensor is 1, that is, the sensor will not fail; when R is greater than 0 and less than 1, it means that the reliability of the sensor is greater than 0 and less than 1, that is, the sensor has a certain probability of failure. When the number of sensors is m, the reliability of all sensors on the battery module is R m , the failure rate is 1-R m For example, when the value of R is 0.9999 and the value of m is 18, the reliability of all sensors on the battery module is 0.99820153, and the corresponding failure rate is 0.00179847.

[0072] It can be seen that the use of Figure 1 The uniform arrangement of the "equally divided areas" of the sensors on the battery module 10 and the corresponding abnormality handling method result in a high fault reporting rate of the battery module or even the vehicle when the sensor fails, affecting the charging and discharging conditions of the battery module, thereby affecting the user's experience of using the battery module.

[0073] Based on the above, Figure 2 The schematic diagram of the structure of a battery module 20 provided in an embodiment of the present application is shown, and the battery module 20 optimizes the arrangement of sensors relative to the battery module 10. The battery module may be a power battery module applied to new energy vehicles, or a battery module for mobile phone terminals.

[0074] The battery module 10 may include a housing 21 , a plurality of battery cells 22 , and a plurality of sensors 23 .

[0075] The box 21 may be a hollow structure, and a plurality of battery cells 22 may be contained in the box 21, arranged along the x direction (first direction) and the y direction (second direction) of the battery module, and a plurality of sensors 23 are arranged in the box 21, and the sensors 23 may be connected to the first surface, wherein the first surface is the top surface formed by the arranged plurality of battery cells. It should be noted that the top surface is the upper surface of the plurality of battery cells when the battery module is in normal use.

[0076] The battery cell 22 may be a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, or a magnesium-ion battery, etc., which is not limited in the embodiments of the present application. It is understood that the specific number of battery cells 22 can be adjusted according to power demand, which is not limited in the present application. Multiple battery cells 22 can be connected in series, in parallel, or in a mixed manner to achieve a larger capacity or power.

[0077] For example, in the embodiment of the present application, the battery module can be divided into isothermal interfaces by thermal simulation technology. Thermal simulation technology can simulate the temperature of each part of the battery module during charging and discharging, calculate the accumulation of heat of each part during charging and discharging, and the points with the same accumulated heat value are isothermal points, and isothermal points can constitute isothermal interfaces. For example, the first isothermal interface of the battery module intersects with the first surface at the first part, where the first part can be understood as a straight line or a curve.

[0078] For example, Figure 2 The multiple isothermal points at the same temperature shown in the figure form a straight line 26 parallel to the x direction of the battery module 20, the z direction is the thickness direction of the battery module 20, the straight line 26 where the multiple isothermal points at the same temperature are located is perpendicular to the thickness direction of the battery module 20, and the isothermal interface (zx plane) where the multiple isothermal points at the same temperature are located is parallel to the thickness direction of the battery module 20 and perpendicular to the plane (xy plane) where the surfaces of the multiple battery cells are located. It should be noted that Figure 2 The perpendicular relationship between the isothermal interface and the first surface shown is only one example of an intersection relationship.

[0079] The multiple sensors 23 may be disposed on the surface of the battery cell or inside the battery cell. Figure 2 The manner in which multiple sensors 23 are arranged on the surface of a battery cell is shown in FIG. Multiple sensors are arranged at intervals on the first portion (e.g., straight line 26). The sensors are used to collect battery status parameters, which are used to determine the state of the battery module. Exemplarily, the battery status parameters include temperature, pressure, etc. In other words, the sensors are used to collect battery status parameters such as battery temperature and pressure on the surface or inside of the battery cell.

[0080] In one implementation, the first isothermal surface of the battery module intersects the first part with the first surface, the first surface is the top surface formed by the arranged multiple battery cells, multiple sensors are arranged at intervals on the first part, and the temperature on the first isothermal interface is in the first temperature range.

[0081] For example, the first isothermal interface of the battery module is as follows Figure 2 The isothermal interface 24 is shown, and the isothermal interface 24 intersects the first surface at a straight line 26 , and four sensors are arranged on the straight line 26 at intervals.

[0082] Exemplarily, the first temperature interval is 20°C±0.2°C, the lowest temperature on the first isothermal interface is 19.8°C, and the highest temperature is 20.2°C.

[0083] In one implementation, the battery module also includes a second isothermal interface, which intersects a second portion of the first surface, and a plurality of sensors are spaced apart on the second portion. The temperature on the second isothermal interface is in a second temperature range, and the first temperature range is different from the second temperature range.

[0084] That is, the battery module 20 may include a plurality of isothermal interfaces, and the temperatures on different isothermal interfaces are located in different temperature intervals. Therefore, the temperatures collected by sensors arranged on different isothermal interfaces are also located in different temperature intervals.

[0085] For example, Figure 2 The isothermal interface 24 shown is a first isothermal interface, and the isothermal interface 25 is a second isothermal interface.

[0086] Optionally, each sensor is evenly arranged on the isothermal interface in the battery module according to "equally divided area". Here, "equally divided area" can be understood as multiple sensors on the same isothermal interface being evenly distributed. For example, multiple sensors are evenly spaced on the first part, and multiple sensors are evenly spaced on the second part. Figure 2 As shown, an isothermal interface 24 and an isothermal interface 25 are exemplarily shown. Four sensors are arranged equidistantly along the x direction on the straight line 26 where the isothermal interface 24 intersects the battery module 20. Four sensors are arranged equidistantly along the x direction on the straight line where the isothermal interface 25 intersects the battery module 2.

[0087] It should be noted that multiple sensors are arranged on each isothermal interface, and multiple sensors arranged on the same isothermal interface are mutually replaceable. When a sensor fails, the remaining sensors can replace the sensor and continue to work. The number of sensors on different isothermal interfaces can be the same or different. Figure 2 As shown, an isothermal interface 24 and an isothermal interface 25 are exemplarily shown. Four sensors are arranged on each isothermal interface, and the four sensors are in a mutually replacing relationship.

[0088] It should be noted that the battery module 20 may include more isothermal interfaces in addition to the first isothermal interface and the second isothermal interface. Multiple sensors are provided on each isothermal interface to obtain the battery state parameters of the isothermal interface.

[0089] Figure 3 The schematic diagram of the structure of another battery module 30 provided in an embodiment of the present application is shown, and the battery module 30 optimizes the number of isothermal interfaces and the number of sensors relative to the battery module 20. The battery module can be a power battery module applied to new energy vehicles, or a battery module for mobile phone terminals.

[0090] The battery module 30 may include a housing 31 , a plurality of battery cells 32 , and a plurality of sensors 33 .

[0091] Among them, the box body 31 can be a hollow structure, and multiple battery cells 32 can be accommodated in the box body 31, arranged along the x direction (first direction) and y direction (second direction) of the battery module. Multiple sensors 33 are arranged in the box body 31, and the sensors 33 can be connected to the first surface, wherein the first surface is the top surface formed by the multiple arranged battery cells.

[0092] The battery cell 32 may be a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, or a magnesium-ion battery, etc., which is not limited in the embodiments of the present application. It is understood that the specific number of battery cells 32 can be adjusted according to power demand, which is not limited in the present application. Multiple battery cells 32 can be connected in series, in parallel, or in a mixed manner to achieve a larger capacity or power.

[0093] For example, in the embodiment of the present application, the battery module can be divided into isothermal interfaces by thermal simulation technology. Thermal simulation technology can simulate the temperature of each part of the battery module during charging and discharging, calculate the accumulation of heat of each part during charging and discharging, and the points with the same accumulated heat value are isothermal points, and isothermal points can constitute isothermal interfaces. For example, the first isothermal interface of the battery module intersects the first part of the first surface, where the first part can be understood as a straight line or a curve.

[0094] In one implementation, the battery module includes, in addition to the first isothermal interface and the second isothermal interface, a third isothermal interface, the third isothermal interface intersects with the first surface at a third portion, a plurality of sensors are spaced apart on the third portion, and the temperature on the third isothermal interface is in a third temperature range, wherein the first temperature range, the second temperature range and the third temperature range are different.

[0095] Exemplarily, the battery module 30 may include a plurality of isothermal interfaces, for example, Figure 3The isothermal interface 34, isothermal interface 35, isothermal interface 36, isothermal interface 37, isothermal interface 38 and isothermal interface 39 are shown in FIG. Among them, the first isothermal interface is the isothermal interface 34, the second isothermal interface is the isothermal interface 37, and the third isothermal interface is the isothermal interface 39. The temperatures on different isothermal interfaces are in different temperature ranges, and the temperatures collected by the sensors set on different isothermal interfaces are also in different temperature ranges.

[0096] In one implementation, the difference between the first temperature interval and the second temperature interval is equal to the difference between the second temperature interval and the third temperature interval.

[0097] That is to say, the battery module 30 includes a plurality of isothermal interfaces, and the plurality of isothermal interfaces may be evenly divided according to a certain temperature gradient.

[0098] For example, Figure 3 As shown, the difference in the temperature ranges of the temperatures on two adjacent isothermal interfaces is the same.

[0099] In one implementation, the first temperature interval is smaller than the second temperature interval, and the second temperature interval is smaller than the third temperature interval.

[0100] Exemplarily, the battery module includes at least the lowest temperature interface and the highest temperature interface, wherein the first isothermal interface may be the lowest temperature interface, the third isothermal interface may be the highest temperature interface, and the temperature interval of the temperature on the second isothermal interface is between the highest temperature and the lowest temperature. The isothermal interface of the battery module is divided by thermal simulation technology, and the isothermal point with the highest heat accumulation value during the charge and discharge process of the battery module constitutes the highest temperature interface, and the isothermal point with the lowest heat accumulation value constitutes the lowest temperature interface.

[0101] For example, Figure 3 The lowest temperature interface is the isothermal interface 34 , and the highest temperature interface is the isothermal interface 39 .

[0102] Figure 3 The multiple isothermal points at the same temperature shown in the figure form a straight line parallel to the x direction of the battery module 30, the z direction is the thickness direction of the battery module 30, the straight line where the multiple isothermal points at the same temperature are located is perpendicular to the thickness direction of the battery module 30, and the isothermal interface (zx plane) where the multiple isothermal points at the same temperature are located is parallel to the thickness direction of the battery module 30 and perpendicular to the plane (xy plane) where the surfaces of the multiple battery cells are located. It should be noted that Figure 3 The perpendicular relationship between the isothermal interface and the first surface shown is only one example of an intersection relationship.

[0103] The plurality of sensors 33 may be provided on the surface of the battery cell or may be provided inside the battery cell. Figure 3The method of disposing a plurality of sensors 33 on the surface of a battery cell is shown. The sensors are used to collect battery status parameters, which are used to determine the state of the battery module. Exemplarily, the battery status parameters include temperature, pressure, etc. In other words, the sensors are used to collect battery status parameters such as battery temperature and pressure on the surface or inside of the battery cell.

[0104] It should be noted that multiple sensors are arranged on each isothermal interface, and multiple sensors arranged on the same isothermal interface are mutually replaceable. When a sensor fails, the remaining sensors can replace the sensor and continue to work. The number of sensors on different isothermal interfaces can be the same or different. Figure 3 As shown, four sensors are exemplarily shown on the isothermal interface 34 , the isothermal interface 35 , the isothermal interface 36 , the isothermal interface 37 , the isothermal interface 38 and the isothermal interface 39 , respectively, and the four sensors are in a mutually substitutable relationship.

[0105] It should be noted that the above Figure 2 as well as Figure 3 In the battery module in FIG. 1 , the isothermal interface may be a rectangle perpendicular to the first surface, for example, isothermal interface 24 and isothermal interface 34. However, in practical applications, the isothermal interface obtained by thermal simulation technology may be an irregular shape. Figure 4 As shown, a structural schematic diagram of another battery module 40 provided in an embodiment of the present application is shown. The battery module may be a power battery module applied to new energy vehicles, or a battery module for a mobile phone terminal.

[0106] The battery module 40 may include a housing 41 , a plurality of battery cells 42 , and a plurality of sensors 43 .

[0107] Among them, the box body 41 can be a hollow structure, and multiple battery cells 42 can be accommodated in the box body 41, arranged along the x direction (first direction) and y direction (second direction) of the battery module, and multiple sensors 43 are arranged in the box body 41. The sensors 43 can be connected to the first surface, wherein the first surface is the top surface formed by the multiple battery cells after arrangement.

[0108] The battery cell 42 may be a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery or a magnesium-ion battery, etc., which is not limited in the embodiments of the present application. It is understood that the specific number of battery cells 42 can be adjusted according to power demand, which is not limited in the present application. Multiple battery cells 42 can be connected in series, in parallel or in a mixed manner to achieve a larger capacity or power.

[0109] For example, in the embodiment of the present application, the battery module can be divided into isothermal interfaces by thermal simulation technology. Thermal simulation technology can simulate the temperature of each part of the battery module during charging and discharging, calculate the accumulation of heat of each part during charging and discharging, and the points with the same accumulated heat value are isothermal points, and isothermal points can constitute isothermal interfaces. For example, the first isothermal interface of the battery module intersects the first part of the first surface, where the first part can be understood as a straight line or a curve. Figure 4 The isothermal points shown constitute an isothermal interface 44 and an isothermal interface 45. The battery module 40 may include multiple isothermal interfaces, including at least a highest temperature interface and a lowest temperature interface. Figure 4 The isothermal interface 44 shown is the highest temperature interface, and the isothermal interface 45 is the lowest temperature interface.

[0110] Taking the isothermal interface 44 as an example, multiple isothermal points of the same temperature are randomly distributed on the plane (xy plane) where the battery cell surface is located, and multiple isothermal points of the same temperature are connected to form a curve 46 parallel to the first surface, and the surface where the curve 46 is located is parallel to the z direction of the battery module 40. It can be understood that the isothermal interface 44 is a surface that passes through the battery cell and is parallel to the z direction of the battery module 40. Multiple sensors 43 can be set on the surface of the battery cell or inside the battery cell. Figure 4 The manner in which multiple sensors 43 are arranged on the surface of a battery cell is shown in FIG. Multiple sensors are arranged on the first part (e.g., curve 46). The sensors are used to collect battery status parameters, which are used to determine the state of the battery module. Exemplarily, the battery status parameters include temperature, pressure, etc. In other words, the sensors are used to collect battery status parameters such as battery temperature and pressure on the surface or inside of the battery cell.

[0111] Furthermore, multiple sensors are arranged on each isothermal interface, and multiple sensors arranged on the same isothermal interface can replace each other. When a sensor fails, the remaining sensors can replace the sensor and continue to work. The number of sensors on different isothermal interfaces can be the same or different. Figure 4 As shown, four sensors are arranged on the isothermal interface 44, and the four sensors are in a mutually substituting relationship; three sensors are arranged on the isothermal interface 45, and the three sensors are in a mutually substituting relationship.

[0112] Based on Figures 2 to 4 The structure of the battery module shown in FIG. Figure 5 As shown, the embodiment of the present application provides a schematic flow chart of an exception handling method, which can be executed by an electronic device, which can be a vehicle terminal or a mobile phone terminal, etc. The electronic device can include a battery module of any structure described above. The method 500 is described in detail below.

[0113] S501, determining whether there is a valid sensor on the first isothermal interface.

[0114] S502: If there is a valid sensor on the first isothermal interface, the electronic device maintains normal operation.

[0115] It should be noted that an effective sensor is a sensor in a normal working state, and the battery state parameters collected by the sensor in a normal working state can be used to estimate the working state of the battery module.

[0116] It should be understood that the battery module in the electronic device includes a first isothermal interface, and the first isothermal interface includes multiple sensors, among which there may be valid sensors and invalid sensors, and the multiple sensors can be substituted for each other. If there is a valid sensor on the first isothermal interface, it means that at least one valid sensor is set on the first isothermal interface and can work normally, so there is no need to perform abnormal processing on the battery module, and the electronic device can maintain normal operation.

[0117] In one implementation, the electronic device may determine the number of invalid sensors on the first isothermal interface, and if the number of invalid sensors on the first isothermal interface is greater than or equal to less than a first threshold, perform first level exception processing.

[0118] It should be noted that an invalid sensor is a sensor that processes an abnormal working state. The battery status parameters collected by the sensor in the abnormal working state may lead to an incorrect estimation of the working state of the battery module.

[0119] Exemplarily, the first level abnormality handling method is to prohibit charging and discharging of the battery module. If the number of invalid sensors on the first isothermal interface is greater than or equal to the first threshold, charging and discharging of the battery module in the electronic device is prohibited.

[0120] It should be understood that the first threshold is related to the number of sensors arranged on the first isothermal interface.

[0121] For example, when three sensors are arranged on the first isothermal interface, the first threshold may be set to 3. If the number of invalid sensors on the first isothermal interface is equal to 3, it means that there is no valid sensor on the first isothermal interface, and charging and discharging of the battery module in the electronic device is prohibited.

[0122] For another example, when four sensors are provided on the first isothermal interface, the first threshold may be set to 4. If the number of invalid sensors on the first isothermal interface is equal to 4, it means that there is no valid sensor on the first isothermal interface, and charging and discharging of the battery module in the electronic device is prohibited.

[0123] It should be understood that the specific conditions for triggering the first level exception handling can be adjusted by setting the first threshold with different values.

[0124] For example, if four sensors are set on the first isothermal interface, if the first threshold is set to 4, it means that when there are no valid sensors on the first isothermal interface, the first level exception handling method will be executed; if the first threshold is set to 2, it means that as long as there are two or more invalid sensors on the first isothermal interface, the first level exception handling method will be executed. Obviously, when the first threshold is set to 2, the specific conditions of the first isothermal exception handling may be more easily triggered.

[0125] It should be noted that the battery module may also include multiple isothermal interfaces. When the battery module includes multiple isothermal interfaces, the electronic device may also perform the following steps:

[0126] In one implementation, the electronic device determines the number of isothermal interfaces that meet a first condition, and performs second-level exception processing if the number of isothermal interfaces that meet the first condition is greater than or equal to a second threshold; wherein the first condition is that there is no valid sensor on the isothermal interface.

[0127] Exemplarily, the second level abnormality handling may be the same as the first level abnormality handling, which is to prohibit charging and discharging of the battery module.

[0128] It should be noted that the second threshold is related to the number of isothermal interfaces in the battery module.

[0129] In one implementation, if the number of isothermal interfaces that meet the first condition is less than the second threshold, the third level exception processing is performed.

[0130] For example, the third level abnormality handling is to limit the charge and discharge power of the battery module. It can be seen that the first level abnormality handling and the second level abnormality handling are more stringent than the third level abnormality handling.

[0131] The following is an example of determining an abnormality handling method when a battery module includes multiple isothermal interfaces.

[0132] Exemplarily, the battery module includes 6 isothermal interfaces, namely isothermal interface 1, isothermal interface 2, isothermal interface 3, isothermal interface 4, isothermal interface 5 and isothermal interface 6. Three sensors are arranged on each isothermal interface. The second threshold is preset to 4. It is determined in turn whether there are valid sensors on the 6 isothermal interfaces in the battery module.

[0133] When the number of isothermal interfaces without valid sensors is 6 (greater than the second threshold), second level abnormal processing may be performed on the battery module, for example, charging and discharging of the battery module may be prohibited.

[0134] When the number of isothermal interfaces without valid sensors is 2 (less than the second threshold), a third level abnormality handling method may be performed on the battery module, for example, limiting the charge and discharge power of the battery module.

[0135] When there are valid sensors on all six isothermal surfaces of the battery module, there is no need to perform exception processing on the battery module.

[0136] Based on this, the third level abnormality processing can be further refined and different charging and discharging power limits can be set.

[0137] For example, the original charge and discharge power is 200W. When the number of isothermal interfaces without effective sensors is 1, the charge and discharge power can be limited to 180W; when the number of isothermal interfaces without effective sensors is 2, the charge and discharge power can be limited to 160W; when the number of isothermal interfaces without effective sensors is 3, the charge and discharge power can be limited to 140W. As the number of isothermal interfaces without effective sensors increases, the charge and discharge power decreases.

[0138] In addition, before determining the number of isothermal interfaces of the first condition, it is necessary to determine in turn whether each isothermal interface satisfies the first condition, that is, it is necessary to determine whether there is a valid sensor on any one of the at least one isothermal interface. If there is a valid sensor, it means that even if there is an invalid sensor on the isothermal interface, there will be other valid sensors to replace the invalid sensor and work normally.

[0139] The following describes a specific method for determining whether there is a valid sensor on the first isothermal interface, assuming that the first isothermal interface includes three sensors:

[0140] Exemplarily, the three sensors included in the first isothermal interface are a first sensor, a second sensor, and a third sensor. The first sensor collects the temperature value of the first sensor, the second sensor collects the temperature value of the second sensor, and the third sensor collects the temperature value of the third sensor. The temperature values ​​of the first sensor, the second sensor, and the third sensor are obtained; a first temperature difference is determined according to the temperature value of the first sensor and the temperature value of the second sensor; a second temperature difference is determined according to the temperature value of the first sensor and the temperature value of the third sensor; and a third temperature difference is determined according to the temperature value of the second sensor and the temperature value of the third sensor. When the first temperature difference, the second temperature difference, and the third temperature difference are less than or equal to the third threshold, the three sensors are determined to be valid sensors; when the first temperature difference is less than or equal to the third threshold, and the second temperature difference and the third temperature difference are greater than the third threshold, the first sensor and the second sensor are determined to be valid sensors.

[0141] It can be understood that the temperatures collected by multiple sensors set on the same isothermal interface should be roughly the same. If the temperature difference is greater than a certain threshold, it means that there may be invalid sensors. Based on this, invalid sensors and valid sensors can be determined according to the temperature difference values ​​collected by each sensor.

[0142] For example, the third threshold is set to 1°C. Sensor A1, sensor A1 and sensor A3 are arranged on the isothermal interface 1. The temperature value of sensor A1 is 30°C, the temperature value of sensor A2 is 30.5°C, and the temperature value of sensor A3 is 30.2°C. Among them, the temperature difference between the temperature value of sensor A1 and the temperature value of sensor A2 is 0.5°C, that is, the first temperature difference is less than the third threshold; the temperature difference between the temperature value of sensor A1 and the temperature value of sensor A3 is 0.2°C, that is, the second temperature difference is less than the third threshold; the temperature difference between the temperature value of sensor A2 and the temperature value of sensor A3 is 0.3°C, that is, the third temperature difference is less than the third threshold. It can be seen that the temperature difference between the temperatures of the three sensors on the isothermal interface 1 does not exceed the second threshold, indicating that there are valid sensors (including sensor A1, sensor A2 and sensor A3) on the isothermal interface 1.

[0143] For another example, the third threshold is set to 1°C. Sensor A1, sensor A1 and sensor A3 are arranged on the isothermal interface 1. The temperature value of sensor A1 is 30°C, the temperature value of sensor A2 is 30.5°C, and the temperature value of sensor A3 is 35°C. Among them, the temperature difference between the temperature value of sensor A1 and the temperature value of sensor A2 is 0.5°C, that is, the first temperature difference is less than the third threshold; the temperature difference between the temperature value of sensor A1 and the temperature value of sensor A3 is 5°C, that is, the second temperature difference is greater than the third threshold; the temperature difference between the temperature value of sensor A2 and the temperature value of sensor A3 is 4.5°C, that is, the third temperature difference is greater than the third threshold. It can be seen that there are valid sensors (including sensor A1 and sensor A2) on the isothermal interface 1, and the invalid sensor is A3. Sensor A1 and sensor A2 can replace sensor A3 as valid sensors.

[0144] Exemplarily, when the first temperature difference, the second temperature difference, and the third temperature difference are greater than a third threshold, the three sensors are determined to be invalid sensors.

[0145] For example, the third threshold is set to 1°C. Sensor A1, sensor A1 and sensor A3 are arranged on the isothermal interface 1. The temperature value of sensor A1 is 30°C, the temperature value of sensor A2 is 25°C, and the temperature value of sensor A3 is 35°C. Among them, the temperature difference between the temperature value of sensor A1 and the temperature value of sensor A2 is 5°C, that is, the first temperature difference is greater than the third threshold; the temperature difference between the temperature value of sensor A1 and the temperature value of sensor A3 is 5°C, that is, the second temperature difference is greater than the third threshold; the temperature difference between the temperature value of sensor A2 and the temperature value of sensor A3 is 10°C, that is, the third temperature difference is greater than the third threshold. It can be seen that the temperature difference between the temperatures of the three sensors on the isothermal interface 1 exceeds the third threshold, then it is impossible to determine the invalid sensor, and it is also impossible to determine whether there is a valid sensor on the isothermal interface. In the case where the valid sensor on the isothermal interface cannot be determined, it is considered that there is no valid sensor on the isothermal interface.

[0146] In one implementation, at least two isothermal interfaces include a first isothermal interface, a second isothermal interface, and a third isothermal interface; based on the first isothermal interface satisfying the first condition, the second isothermal interface satisfying the first condition, and the third isothermal interface satisfying the first condition, it is determined to execute the second level exception processing.

[0147] Exemplarily, the at least two isothermal interfaces include isothermal interface 1, isothermal interface 2, and isothermal interface 3. When no valid sensor exists on the three isothermal interfaces, the second level abnormal processing may be performed to prohibit charging and discharging of the battery module.

[0148] In one implementation, the at least two isothermal interfaces include a first isothermal interface, a second isothermal interface, and a third isothermal interface; based on the first isothermal interface satisfying the second condition, the second isothermal interface satisfying the second condition, and the third isothermal interface satisfying the second condition, it is determined not to perform exception processing.

[0149] Exemplarily, the at least two isothermal interfaces include isothermal interface 1, isothermal interface 2, and isothermal interface 3. When valid sensors exist on the three isothermal interfaces, the abnormal processing mode may not be executed, and the electronic device maintains normal operation.

[0150] Based on the above solution, by dividing the isothermal interface in the battery module and setting multiple sensors on the isothermal interface, the multiple sensors on the same isothermal interface are used to collect the temperature on the isothermal interface. If there is an invalid sensor, as long as there is a sensor that can work normally among the multiple sensors on the isothermal interface, the invalid sensor can be replaced by the sensor to collect the battery status parameters, and there is no need to report the fault immediately. While reducing the fault reporting rate of the battery module, it can also ensure the normal estimation of the battery status and battery performance as much as possible.

[0151] The embodiment of the present application also provides an electronic device, which may include the above-mentioned battery module, such as battery module 20, battery module 30 or battery module 40. The battery module can supply power to the electronic device. The electronic device may be a vehicle, a mobile phone terminal, etc.

[0152] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A battery module, It is characterized in that The battery module includes a plurality of battery cells; The plurality of battery cells are arranged along a first direction and a second direction of the battery module; The first isothermal interface of the battery module intersects with the first surface at a first portion. The first surface is the top surface formed by the arranged battery cells. A plurality of sensors are arranged at intervals on the first portion. The temperature on the first isothermal interface is in a first temperature range.

2. The battery module according to claim 1, It is characterized in that The battery module also includes a second isothermal interface, which intersects a second portion of the first surface, a plurality of sensors are arranged at intervals on the second portion, and the temperature on the second isothermal interface is in a second temperature range, and the first temperature range is different from the second temperature range.

3. The battery module according to claim 2 or 3, It is characterized in that The battery module also includes a third isothermal interface, which intersects a third part of the first surface. A plurality of sensors are arranged at intervals on the third part. The temperature on the third isothermal interface is in a third temperature range, and the first temperature range, the second temperature range and the third temperature range are different.

4. The battery module according to claim 3, It is characterized in that A difference between the first temperature interval and the second temperature interval is equal to a difference between the second temperature interval and the third temperature interval.

5. The battery module according to claim 4, It is characterized in that The first temperature interval is less than or equal to a first temperature threshold, the third temperature interval is greater than or equal to a second temperature threshold, and the second temperature threshold is greater than the first temperature threshold.

6. The battery module according to claim 4 or 5, It is characterized in that The first temperature interval is smaller than the second temperature interval, and the second temperature interval is smaller than the third temperature interval.

7. The battery module according to any one of claims 1 to 6, It is characterized in that The battery is one of the following: Lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, magnesium-ion batteries.

8. An electronic device, It is characterized in that The electronic device comprises a battery module as claimed in any one of claims 1 to 7, and the electronic device is used to perform the following steps: Determine whether there is a valid sensor on the first isothermal interface, the valid sensor being a sensor in a normal working state; If the valid sensor exists on the first isothermal interface, the electronic device keeps operating normally.

9. The electronic device according to claim 8, It is characterized in that The electronic device is used to perform the following steps: Determining the number of invalid sensors on the first isothermal interface, wherein the invalid sensors are sensors in an abnormal working state; If the number of the invalid sensors on the first isothermal interface is greater than or equal to a first threshold, a first level abnormality process is performed.

10. The electronic device according to claim 8 or 9, It is characterized in that The battery module further includes a plurality of isothermal interfaces, and the electronic device is used to perform the following steps: Determining the number of the isothermal interfaces that meet a first condition, wherein the first condition is that no valid sensor exists on the isothermal interface; If the number of the isothermal interfaces that meet the first condition is greater than or equal to a second threshold, a second level abnormality process is performed.

11. The electronic device according to claim 10, It is characterized in that The electronic device is also used to perform the following steps: If the number of isothermal interfaces that meet the first condition is less than the second threshold, a third level exception process is performed.

12. The electronic device according to claim 11, It is characterized in that The first isothermal interface includes three sensors, the three sensors include a first sensor, a second sensor and a third sensor, and the determining whether there is a valid sensor on the first isothermal interface is specifically: Acquire the temperature value of the first sensor, the temperature value of the second sensor, and the temperature value of the third sensor; determining a first temperature difference according to a temperature value of the first sensor and a temperature value of the second sensor; determining a second temperature difference according to the temperature value of the first sensor and the temperature value of the third sensor; determining a third temperature difference according to the temperature value of the second sensor and the temperature value of the third sensor; When the first temperature difference, the second temperature difference, and the third temperature difference are less than or equal to a third threshold, determining that the three sensors are valid sensors; When the first temperature difference is less than or equal to the third threshold, and the second temperature difference and the third temperature difference are greater than the third threshold, it is determined that the first sensor and the second sensor are the valid sensors.

13. The electronic device according to claim 12, It is characterized in that The electronic device is also used to perform the following steps: When the first temperature difference, the second temperature difference, and the third temperature difference are greater than the third threshold, the three sensors are determined to be the invalid sensors.

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