Battery device and electric equipment

Abstract

The utility model provides a battery device and electric equipment, and relates to the technical field of batteries. One battery device can be provided with a plurality of groups of battery cell temperature collectors, and each group of battery cell temperature collectors comprises at least two battery cell temperature collectors which do not share the same ground wire, so that even if a certain ground wire fails due to open circuit, short circuit and other problems, the battery cell temperature collectors connected with other ground wires can still work; and the temperature of the battery cell in the battery device is continuously acquired, so that the reliability of temperature acquisition is improved, the over-temperature condition of the battery cell can be found in time, and the risk of thermal runaway is reduced.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to a battery device and an electrical appliance. Background Technology

[0002] In the field of battery management systems, battery temperature management is crucial to battery life and safety performance. High temperatures accelerate battery aging, shorten battery life, and increase the risk of battery explosion and fire. Low temperatures affect battery output power and energy density.

[0003] To monitor the temperature of the battery cells within a battery pack, temperature sensors are typically deployed inside the pack. Currently, due to cost and space constraints, all temperature sensors share the same ground wire (GND), resulting in poor reliability of temperature data acquisition. Utility Model Content

[0004] The purpose of this application is to provide a battery device and electrical equipment to improve the poor reliability of existing methods.

[0005] In a first aspect, embodiments of this application provide a battery device, the battery device comprising:

[0006] Multiple sets of cell temperature acquisition devices are used to collect the temperature of the cells at different locations within the battery device;

[0007] Each group of cell temperature acquisition devices includes at least two cell temperature acquisition devices that do not share the same ground wire.

[0008] In the above implementation process, by setting up multiple sets of cell temperature acquisition devices, and each set of cell temperature acquisition devices includes at least two cell temperature acquisition devices that do not share the same ground wire, even if one of the ground wires fails due to open or short circuits, the cell temperature acquisition devices connected to other ground wires can continue to work and continue to collect the temperature of the cells in the battery device, thereby improving the reliability of temperature acquisition, so as to detect the overheating of the cells in time and reduce the risk of thermal runaway.

[0009] Optionally, at least one cell temperature sensor in each group of cell temperature sensors shares the same ground wire with at least one cell temperature sensor in other groups. This ensures that even if one of the cell temperature sensors sharing the ground wire fails, the remaining cell temperature sensors can continue to collect temperatures, while saving wiring space and costs.

[0010] Secondly, embodiments of this application provide a battery device, the battery device comprising:

[0011] Multiple sets of cell temperature acquisition devices are used to collect the temperature of the cells at different locations within the battery device;

[0012] Each group of cell temperature acquisition devices includes multiple cell temperature acquisition devices that share the same ground wire, but the cell temperature acquisition devices in different groups do not share the same ground wire.

[0013] In the above implementation process, the temperature acquisition devices of each group of cells do not share the same ground wire. In this way, even if the ground wire connected to one group of cell temperature acquisition devices fails, the other groups of cell temperature acquisition devices can still continue to work and collect temperature data, thereby timely detecting the overheating of the cells and reducing the risk of thermal runaway.

[0014] Optionally, the number of cell temperature collectors in each group is less than a set number. Having fewer cell temperature collectors in each group allows for smaller intervals between groups, ensuring that even if one group fails, the temperature of the cell at that location can still be collected by other groups.

[0015] Optionally, each group of cell temperature acquisition devices includes at least two cell temperature acquisition devices arranged adjacent to each other. Each group of cell temperature acquisition devices is used to collect temperature data of the cells within the area corresponding to that group of cell temperature acquisition devices. In this way, even if some cell temperature acquisition devices in each group fail, temperature acquisition can continue through other cell temperature acquisition devices in that group, or it can continue through adjacent cell temperature acquisition devices in that group.

[0016] Optionally, the multiple sets of cell temperature sensors are arranged evenly at predetermined intervals along the length of the battery device. This ensures that the temperature of each cell can be effectively collected, and that temperature differences between cells can be captured more accurately, thus reflecting the overall temperature distribution of the battery device more precisely.

[0017] Optionally, the number of cell temperature acquisition devices in each group can be the same or different. Using the same number of cell temperature acquisition devices ensures balanced temperature monitoring at each location, thus more accurately reflecting the overall temperature distribution of the battery pack. Different numbers of cell temperature acquisition devices in each group can flexibly adapt to changes in the battery pack's structure or cell arrangement.

[0018] Optionally, the cell temperature acquisition devices included in each group of cell temperature acquisition devices may be of the same or different types, and / or, the cell temperature acquisition devices included in each group of cell temperature acquisition devices may be of the same or different types. Using the same type of cell temperature acquisition device can reduce system failures caused by compatibility issues between different acquisition devices. Different types of acquisition devices may have different measurement ranges, accuracy, and response times, which helps to monitor the temperature changes of each cell more accurately.

[0019] Optionally, the cell temperature acquisition device may include at least one of thermistors, thermocouples, resistance temperature detectors (RTDs), and temperature sensors.

[0020] Optionally, the total number of the multiple sets of cell temperature sensors is at least half the number of cells in the battery device. This satisfies wiring requirements while saving on hardware costs.

[0021] Thirdly, embodiments of this application provide an electrical device, which includes the aforementioned battery device, and the battery device is used to provide electrical energy to the electrical device.

[0022] Other features and advantages of this application will be set forth in the following description and will be apparent in part from the description or may be learned by practicing embodiments of this application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of a battery device provided in an embodiment of this application;

[0025] Figure 2 A schematic diagram of the wiring structure of each group of battery cell temperature acquisition devices provided in the embodiments of this application;

[0026] Figure 3 This is a schematic diagram of the wiring structure of another set of cell temperature acquisition devices provided in an embodiment of this application;

[0027] Figure 4 This is a schematic diagram of the structure of an electrical device provided in an embodiment of this application.

[0028] Icons: 100 - Battery device; 110 - Cell temperature sensor; 200 - Electrical equipment. Detailed Implementation

[0029] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0030] It should be noted that the term "multiple" in the embodiments of this utility model refers to two or more. Therefore, "multiple" can also be understood as "at least two" in the embodiments of this utility model. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Additionally, the character " / ", unless otherwise specified, generally indicates that the preceding and following related objects have an "or" relationship.

[0031] The terms "first," "second," etc., in the specification, claims, or the accompanying drawings of this application are used to distinguish different objects, rather than to describe a specific order or primary / secondary relationship.

[0032] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0033] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0034] In this application, "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two).

[0035] To monitor the temperature of the battery cells within a battery pack, temperature sensors are typically deployed inside the pack. Currently, due to cost and space constraints, all temperature sensors share the same ground wire (GND), resulting in poor reliability during temperature acquisition.

[0036] Based on the above-mentioned technical problems, this application provides a battery device that sets up multiple sets of cell temperature acquisition devices, with each set containing at least two cell temperature acquisition devices that do not share the same ground wire. In this way, even if one of the ground wires fails due to open or short circuits, the cell temperature acquisition devices connected to other ground wires can continue to work and continue to collect the temperature of the cells in the battery device, thereby improving the reliability of temperature acquisition and enabling timely detection of cell overheating and reducing the risk of thermal runaway.

[0037] The battery device mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar. In some scenarios, a battery cell may also be referred to as a battery cell; in the following embodiments, it will be described as a battery cell.

[0038] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells; as an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells into a single module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0039] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cell assemblies housed within the housing.

[0040] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0041] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0042] As an example, a battery cell can be a secondary battery, which refers to a battery cell that can be recharged after being discharged to activate the active materials and continue to be used.

[0043] The battery cell may be, but is not limited to, lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc.

[0044] As an example, a battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries.

[0045] This application provides various deployment methods for battery cell temperature acquisition devices. Among these battery cell temperature acquisition devices, at least two battery cell temperature acquisition devices do not share the same ground wire. This way, even if some of the ground wires fail, temperature acquisition can still be performed through battery cell temperature acquisition devices connected by other valid ground wires, resulting in higher reliability.

[0046] Example 1

[0047] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a battery device 100 provided in an embodiment of this application. The battery device 100 includes multiple sets of cell temperature acquisition devices 110 for acquiring the temperature of the cells at different locations within the battery device 100. Each set of cell temperature acquisition devices 110 includes at least two cell temperature acquisition devices 110 that do not share the same ground wire.

[0048] Understandably, each group of cell temperature sensors 110 may include at least two cell temperature sensors 110. When N cell temperature sensors 110 are deployed in the battery device 100, the N cell temperature sensors 110 can be divided into multiple groups, such as M groups. Each group includes N / M (if divisible) cell temperature sensors 110. Understandably, if N / M is not divisible, the number of cell temperature sensors 110 included in each group of cell temperature sensors 110 may be different. In principle, N can be greater than M, where M is an integer greater than or equal to 2.

[0049] When grouping multiple cell temperature acquisition devices 110, multiple adjacent cell temperature acquisition devices 110 arranged in the battery device can be grouped into one group. Multiple groups of cell temperature acquisition devices 110 can be arranged sequentially along the length or width of the battery device 100 to adapt to the arrangement of cells in the battery device 100, thereby facilitating and accurately collecting cell temperature data.

[0050] During wiring, at least two cell temperature acquisition devices 110 in each group are not on the same ground wire. For example, multiple groups of cell temperature acquisition devices 110 include three groups, namely group 1, group 2 and group 3. Each group may include three cell temperature acquisition devices 110. In each group, two of the cell temperature acquisition devices 110 can share a ground wire, and the remaining cell temperature acquisition device 110 in the three groups can share the same ground wire.

[0051] For example, group 1 includes cell temperature acquisition devices a1, a2 and a3, group 2 includes cell temperature acquisition devices b1, b2 and b3, and group 3 includes cell temperature acquisition devices c1, c2 and c3. a1 and a2 share a common ground wire GND1, b1 and b2 share a ground wire GND2, c1 and c2 share a common ground wire GND3, and a3, b3 and c3 share a common ground wire GND4.

[0052] In some implementations, the two or three ground wires GND1, GND2 and GND3 can be the same ground wire. Of course, a3, b3 and c3 can each be connected to different ground wires. For example, a3 is connected to GND5, b3 is connected to GND6 and c3 is connected to GND7. GND5, GND6 and GND7 are different, or at least two of a3, b3 and c3 can be connected to the same ground wire.

[0053] When multiple sets of cell temperature sensors 110 are arranged within the battery device 100, they can be arranged sequentially along the length of the cell device. For example, in the above example, the three sets of cell temperature sensors 110 are arranged sequentially from left to right. Specifically, the three cells of group 1 can be arranged at position 1 on the left side of the length direction, the three cells of group 2 at position 2 in the middle of the length direction, and the three cells of group 3 at position 3 on the right side of the length direction. The three cells of each group are arranged with a gap between them.

[0054] Cell temperature sensors 110 are arranged at different positions along the length of the battery device 100. Each group of cell temperature sensors 110 can collect the temperature of the cells at a specific position. For example, group 1 can collect the temperature of the cells at position 1, group 2 can collect the temperature of the cells at position 2, and group 3 can collect the temperature of the cells at position 3. Of course, there may be one or more cells at each position. Since not all cell temperature sensors 110 in each group share the same ground wire, even if one ground wire experiences an open or short circuit fault, the other ground wires can still enable the corresponding connected cell temperature sensors to continue working, thus continuing to collect the temperature of the cells at the corresponding positions. For example, for the cell at position 1, if ground wire GND1 fails due to an open or short circuit, but ground wire GND4 has not yet failed, then cell temperature acquisition device a3 can still be used to collect the temperature of the cell at position 1, so that the temperature of the cell at each position can be effectively collected.

[0055] In the above implementation process, by setting up multiple sets of cell temperature acquisition devices 110, and each set of cell temperature acquisition devices 110 includes at least two cell temperature acquisition devices 110 that do not share the same ground wire, even if one of the ground wires fails due to open or short circuits, the cell temperature acquisition devices 110 connected to other ground wires can continue to work and continue to collect the temperature of the cells in the battery device 100, thereby improving the reliability of temperature acquisition, so as to detect the overheating of the cells in time and reduce the risk of thermal runaway.

[0056] Based on the above embodiments, at least one cell temperature sensor 110 of each group of cell temperature sensors 110 shares the same ground wire with at least one cell temperature sensor 110 of other groups of cell temperature sensors 110.

[0057] The other groups of cell temperature acquisition devices 110 here can be understood as any one or more other groups of cell temperature acquisition devices 110 besides the one in this group. For example, at least one cell temperature acquisition device 110 in group 1 in the above example shares the same ground wire with group 2 or group 3, or at least one cell temperature acquisition device 110 in each of group 2 and group 3.

[0058] For example, in the example above, group 1's a3, group 2's b3, and group 3's c3 share a common ground wire GND4. Alternatively, in the example above, group 1's a1 and group 2's b1 share a common ground wire, group 1's a2 and group 3's c1 share a common ground wire, group 1's a3 and group 2's b2 share a common ground wire, and group 2's b3, group 3's c2, and c3 share a common ground wire.

[0059] In other embodiments, each cell temperature sensor 110 in each group of cell temperature sensors 110 may be connected to a different ground wire, that is, there may be no cell temperature sensors 110 in each group of cell temperature sensors 110 that share the same ground wire, or they may share the ground wire with cell temperature sensors 110 in other groups.

[0060] like Figure 2 As shown, one cell temperature sensor 110 from each group of cell temperature sensors 110 is selected to share a ground wire. For example, a1 of group 1, b1 of group 2, and c1 of group 3 can share the same ground wire; a2 of group 1, b2 of group 2, and c2 of group 3 can share the same ground wire; and a3 of group 1, b3 of group 2, and c3 of group 3 can share the same ground wire. In other words, these nine cell temperature sensors 110 can use three ground wires, and no two cells in each group share the same ground wire. This is equivalent to each group of cell temperature sensors 110 being connected to three ground wires, with each cell temperature sensor 110 connected to a different ground wire. Even if some ground wires fail, the remaining ground wires can still allow the cell temperature sensors 110 connected to the remaining ground wires to continue temperature acquisition.

[0061] like Figure 2 Even if the ground wires connected to a1 in group 1, b1 in group 2, and c1 in group 3 fail, the temperature of the battery cell can still be collected at each location using a2, a3, b2, b3, c2, and c3, thereby enabling monitoring of the battery cell temperature at each location and reducing the risk of thermal runaway.

[0062] In the above implementation process, even if one of the common ground wire cell temperature collectors 110 in each group of cell temperature collectors 110 fails, the remaining cell temperature collectors 110 can still continue to collect temperatures, while saving wiring space and costs.

[0063] Example 2

[0064] To facilitate wiring, save internal space of the battery device 100, and improve space utilization, the battery device 100 includes multiple sets of cell temperature acquisition devices 110 for collecting the temperature of the cells at different locations within the battery device 100. Each set of cell temperature acquisition devices 110 includes multiple cell temperature acquisition devices 110 that share the same ground wire, but each set of cell temperature acquisition devices 110 does not share the same ground wire.

[0065] The difference between this implementation and the first embodiment is that all the cell temperature acquisition devices 110 in each group of cell temperature acquisition devices 110 share the same ground wire, and the cell temperature acquisition devices 110 in each group do not share the same ground wire.

[0066] For example, the multiple sets of cell temperature sensors 110 may include three sets: set 1, set 2, and set 3. Each set may include three cell temperature sensors 110, and within each set, the three cell temperature sensors 110 may share a common ground wire. For example, as... Figure 3 As shown, group 1 includes cell temperature acquisition devices a1, a2 and a3, group 2 includes cell temperature acquisition devices b1, b2 and b3, and group 3 includes cell temperature acquisition devices c1, c2 and c3. a1 and a2, a3 share a common ground wire GND1, b1 and b2, b3 share a common ground wire GND2, and c1 and c2, c3 share a common ground wire GND3. These three ground wires are different.

[0067] In this implementation, although each group of cell temperature acquisition devices 110 shares the same ground wire, compared to all cell temperature acquisition devices 110 inside the battery device 100 sharing the same ground wire, it can improve the situation where cell temperature cannot be acquired when the ground wire fails. For example, even if the ground wire connected to group 1 fails, groups 2 and 3 can still continue to work and continue to acquire the temperature of cells in other locations inside the battery, and can also detect changes in cell temperature in a timely manner, reducing the risk of thermal runaway.

[0068] In the above implementation process, the cell temperature acquisition devices 110 do not share the same ground wire. In this way, even if the ground wire connected to one group of cell temperature acquisition devices 110 fails, the other groups of cell temperature acquisition devices 110 can still continue to work and collect temperature data, thereby timely detecting the overheating of the cell and reducing the risk of thermal runaway.

[0069] Based on Example 2, in order to ensure that the temperature of the battery cells at all locations can be effectively monitored, the number of battery cell temperature samples collected in each group of battery cell temperature collectors 110 is less than the set number.

[0070] For example, if the number is set to 3, then each group of cell temperature sensors 110 contains either 1 or 2 cell temperature sensors 110. When there are 2, the two cell temperature sensors 110 share the same ground wire. Since the space occupied by the two cell temperature sensors 110 deployed in the battery device 100 is relatively small, even if the ground wire connecting these two cell temperature sensors 110 fails, the temperature of the cell at that small location cannot be effectively detected. However, since heat can be transferred within space, the temperature can still be collected by adjacent cell temperature sensors 110. For example, if the ground wire connecting the two cell temperature sensors in group 1 fails, preventing the temperature of the cell at location 1 from being collected, the temperature of the cell at location 1 can be collected by the cell temperature sensor in group 2, although the collected temperature will be less effective. However, this will not affect the overall temperature perception within the battery device 100, and this method effectively reduces the risk of thermal runaway.

[0071] In the above implementation process, the number of cell temperature acquisition devices 110 configured in each group of cell temperature acquisition devices 110 is small, which can make the interval between each group small. In this way, even if one group of cell temperature acquisition devices 110 fails, the temperature of the cell at the location of that group of cell temperature acquisition devices 110 can still be acquired by other groups of cell temperature acquisition devices 110.

[0072] Based on the above embodiments one and two, each group of cell temperature collectors 110 includes at least two cell temperature collectors arranged adjacent to each other, and each group of cell temperature collectors 110 is used to collect the temperature data of the cells in the area corresponding to the group of cell temperature collectors.

[0073] As in the above embodiment, each group of cell temperature collectors 110 is arranged sequentially along the length of the battery device 100. Alternatively, each cell temperature collector can be arranged at intervals along the length. Each group of cell temperature collectors 110 can be used to collect temperature data of the cells within a corresponding area. For example, in the above example, the cell temperature collector in group 1 can collect the temperature data of the cell at position 1. If multiple cells are located at position 1, then the three cell temperature collectors in group 1 can collect the temperature data of multiple cells at position 1.

[0074] In the implementation of Example 1, even if some of the three cell temperature acquisition devices in Group 1 fail to acquire temperature data, the other cell temperature acquisition devices in Group 1 can still continue to acquire temperature data for multiple cells at position 1. In the implementation of Example 2, even if all three cell temperature acquisition devices in Group 1 fail, temperature acquisition can continue through the cell temperature acquisition devices in Group 2, which is adjacent to Group 1. Since thermal runaway can lead to thermal propagation, if a cell at position 1 experiences thermal runaway, the thermal propagation will cause the temperature at position 2, adjacent to position 1, to rise. At this time, the cell temperature acquisition devices in Group 2 can acquire the temperature of the cell at position 2, thus detecting thermal runaway based on the acquired temperature. Furthermore, since positions 1 and 2 are adjacent, the cell temperature acquisition devices in Group 2 can actually sense the temperature change of the cell at position 1. Therefore, even if the cell temperature acquisition devices in Group 1 fail, the cell temperature acquisition devices in Group 2 can continue to acquire temperature data.

[0075] Based on the above embodiments one and two, in order to improve the comprehensiveness and accuracy of temperature detection, multiple sets of cell temperature acquisition devices 110 are arranged evenly at set intervals along the length of the battery device 100.

[0076] For example, in the above example, the distance between group 1 and group 2 is set at an interval, the distance between group 2 and group 3 is set at an interval, and the individual cell temperature collectors 110 in each group can also be evenly distributed according to the set distance, that is, the distance between each cell temperature collector 110 in the group is about the same, that is, the distance between them is within the set range.

[0077] This allows multiple cell temperature sensors 110 to be evenly distributed within the battery device 100, ensuring that the temperature of each cell can be effectively collected and that the temperature differences between cells can be captured, thereby more accurately reflecting the overall temperature distribution of the battery device 100.

[0078] Based on the above embodiments one and two, the number of cell temperature acquisition devices 110 included in each group of cell temperature acquisition devices 110 may be the same or different.

[0079] As in the example above, the number of cell temperature acquisition devices 110 in groups 1, 2 and 3 can be the same, such as including 3 cell temperature acquisition devices 110 in each group. In this way, the same number of cell temperature acquisition devices 110 can be used to collect temperature at each location, so as to ensure that balanced temperature monitoring can be achieved at each location, thereby more accurately reflecting the overall temperature distribution of the battery device 100.

[0080] Alternatively, as in the examples above, the number of cell temperature sensors 110 in groups 1, 2, and 3 can differ. For instance, group 1 could include 2 cell temperature sensors 110, group 2 could include 3 cell temperature sensors 110, and group 3 could include 2 cell temperature sensors 110. In this approach, more cell temperature sensors 110 can be set at the intermediate position because the intermediate temperature within the battery device 100 needs to be monitored closely, so a larger number of cell temperature sensors 110 can be deployed for effective detection.

[0081] Furthermore, when the structure of the battery device 100 or the arrangement of the cells changes, the different numbers of cell temperature sensors 110 in each group can flexibly adapt to this change. Moreover, when budget constraints exist, configuring different numbers of cell temperature sensors 110 in each group can achieve more optimized cost-effectiveness. For example, increasing the number of temperature sensors at one end of the battery device 100 or in areas with large temperature variations, while reducing the number in other areas, can reduce costs while ensuring the accuracy of temperature monitoring.

[0082] Based on the above embodiments one and two, the types of cell temperature collectors 110 included in each group of cell temperature collectors 110 may be the same or different, and / or, the types of cell temperature collectors 110 included in each group of cell temperature collectors 110 may be the same or different.

[0083] In the example above, the cell temperature acquisition devices 110 in groups 1, 2 and 3 can be of the same type, such as thermistors. This way, the same type of cell temperature acquisition device 110 can be used to acquire temperature at each location, which can reduce the complexity and cost of hardware deployment.

[0084] And / or, as in the above example, the cell temperature acquisition device 110 in each group can be of the same type. For example, the cell temperature acquisition device 110 in group 1 is a thermistor, and the cell temperature acquisition device 110 in groups 2 and 3 is a temperature sensor, etc.

[0085] Understandably, using the same type of cell temperature sensor 110 can reduce system failures caused by compatibility issues between different sensors. The same sensor type also means similar performance and reliability, which helps to improve the stability and reliability of the entire battery management system.

[0086] And / or, the cell temperature acquisition devices 110 in groups 1, 2 and 3 in the above examples may be of different types. For example, the cell temperature acquisition device 110 in group 1 is a thermistor, the cell temperature acquisition device 110 in group 2 is a temperature sensor, and the cell temperature acquisition device 110 in group 3 is a thermistor.

[0087] And / or, as in the examples above, the types of cell temperature acquisition devices 110 within each group can be different. For example, group 1 includes three cell temperature acquisition devices 110, two of which are thermistors, and the other is a temperature sensor.

[0088] Understandably, different types of data acquisition units may have different measurement ranges, accuracies, and response times, which helps to monitor temperature changes in each battery cell more accurately. In some cases, using different types of battery cell temperature data acquisition units 110 can improve the accuracy and reliability of temperature monitoring. For example, in locations where high-precision temperature monitoring is required, selecting a data acquisition unit type with higher accuracy can ensure the accuracy of temperature monitoring.

[0089] Based on the above embodiments one and two, the cell temperature acquisition device 110 may include at least one of thermistors, thermocouples, resistance temperature detectors and temperature sensors, so that a suitable type of cell temperature acquisition device 110 can be selected according to the requirements.

[0090] Based on the above embodiments one and two, in order to monitor the temperature inside the battery device 100 more comprehensively, the total number of multiple sets of cell temperature acquisition devices 110 can be at least half the number of cells inside the battery device 100.

[0091] For example, if the battery device 100 includes 18 cells, then the number of cell temperature acquisition devices 110 must be at least 9, that is, greater than or equal to 9. These 9 cell temperature acquisition devices 110 can be divided into multiple groups, such as 3 groups, with 3 cell temperature acquisition devices 110 in each group. The purpose of this design is to match the number of temperature sampling harnesses. Generally, the number of cell temperature sampling harnesses in the battery device 100 is at least half the number of cells, so the number of cell temperature acquisition devices 110 can also be at least half the number of cells. Therefore, this satisfies the wiring requirements while saving certain hardware costs.

[0092] Based on the above embodiments one and two, the ground wire connected to each cell temperature acquisition device 110 refers to the ground pin connected to the sampling board. Not sharing a ground wire can be understood as connecting to different ground pins, while sharing the same ground wire can be understood as connecting to the same ground pin. In this way, if the same ground pin fails, the cell temperature acquisition device 110 connected to that ground pin will also fail. Therefore, temperature acquisition can be performed by cell temperature acquisition devices 110 connected to other unfailed ground pins. This allows for temperature detection of cells at different locations, timely detection of overheating of cells, and reduction of the risk of thermal runaway.

[0093] Please refer to Figure 4 , Figure 4 This is a schematic diagram of the structure of an electrical device 200 provided in an embodiment of this application. The electrical device 200 includes the battery device 100 described above, which is used to provide electrical energy to the electrical device 200.

[0094] Among them, the electrical equipment 200 can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0095] For ease of explanation, this application uses a vehicle as an example to illustrate an electrical device 200. The vehicle can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is installed inside the vehicle. The battery device 100 can be located at the bottom, front, or rear of the vehicle. The battery device 100 can be used to power the vehicle; for example, it can serve as the vehicle's operating power source or general power source, such as for the vehicle's starting, navigation, and operating power needs during driving.

[0096] The vehicle may also include a controller and a motor, the controller being used to control the battery unit 100 to power the motor, for example, for the power needs of starting, navigating and driving the vehicle.

[0097] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle, but also as the driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0098] In summary, the embodiments of this application provide a battery device and an electrical device. One of the battery devices can be equipped with multiple sets of cell temperature acquisition devices, and each set of cell temperature acquisition devices includes at least two cell temperature acquisition devices that do not share the same ground wire. In this way, even if one of the ground wires fails due to open or short circuits, the cell temperature acquisition devices connected to other ground wires can continue to work and continue to collect the temperature of the cells in the battery device, thereby improving the reliability of temperature acquisition and enabling timely detection of cell overheating and reducing the risk of thermal runaway.

[0099] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A battery device, characterized in that, The battery device includes: Multiple sets of cell temperature acquisition devices are used to collect the temperature of the cells at different locations within the battery device; Each group of cell temperature acquisition devices includes at least two cell temperature acquisition devices that do not share the same ground wire.

2. The battery device according to claim 1, characterized in that, At least one cell temperature sensor in each group of cell temperature sensors shares the same ground wire with at least one cell temperature sensor in other groups of cell temperature sensors.

3. A battery device, characterized in that, The battery device includes: Multiple sets of cell temperature acquisition devices are used to collect the temperature of the cells at different locations within the battery device; Each group of cell temperature acquisition devices includes multiple cell temperature acquisition devices that share the same ground wire, but the cell temperature acquisition devices in different groups do not share the same ground wire.

4. The battery device according to claim 3, characterized in that, The number of cell temperature collectors in each group is less than the set number.

5. The battery device according to claim 1 or 3, characterized in that, Each group of cell temperature acquisition devices includes at least two cell temperature acquisition devices arranged adjacent to each other, and each group of cell temperature acquisition devices is used to collect the temperature data of the cells in the area corresponding to that group of cell temperature acquisition devices.

6. The battery device according to claim 1 or 3, characterized in that, The multiple sets of cell temperature sensors are arranged evenly at set intervals along the length of the battery device.

7. The battery device according to claim 1 or 3, characterized in that, The number of cell temperature acquisition devices included in each group of cell temperature acquisition devices may be the same or different.

8. The battery device according to claim 1 or 3, characterized in that, The cell temperature acquisition devices in each group may be of the same or different types, and / or, the cell temperature acquisition devices in each group may be of the same or different types.

9. The battery device according to claim 8, characterized in that, The cell temperature acquisition device includes at least one of the following: thermistor, thermocouple, resistance temperature detector (RTD), and temperature sensor.

10. The battery device according to claim 1 or 3, characterized in that, The total number of the multiple sets of cell temperature acquisition devices is at least half the number of cells in the battery device.

11. An electrical appliance, characterized in that, The electrical equipment includes the battery device according to any one of claims 1-10, the battery device being used to provide electrical energy to the electrical equipment.

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