Battery device and electric equipment

Abstract

The utility model provides a battery device and electric equipment, and relates to the technical field of batteries. In the scheme, the voltage balancing piece is arranged on the sampling wire harness, namely, the voltage balancing piece is placed outside the sampling plate, so that the limitation of the sampling plate on the voltage balancing piece in the aspect of heat dissipation can be reduced, the heat dissipation difficulty of the sampling plate is reduced, the voltage balancing piece is arranged outside the sampling plate, and the influence of heating of the voltage balancing piece on the sampling plate can be reduced; moreover, the hardware space of the sampling board can be saved, and the area of the sampling board 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] A battery device typically consists of multiple battery cells. However, due to slight differences in the characteristics of each battery cell, the charging and discharging of the battery cells are inconsistent. Furthermore, as the number of charging and discharging cycles increases, the voltage difference between battery cells also increases. Therefore, it is necessary to monitor and balance the voltage of each battery cell to keep the voltage of each battery cell as consistent as possible.

[0003] Currently, resistive passive balancing circuits are widely used in battery systems for voltage equalization. These circuits typically include multiple balancing resistors, each responsible for equalizing the voltage of a single battery cell. The balancing circuit is usually housed in a sampling board; however, the limited space on the sampling board makes heat dissipation of these balancing resistors challenging. Utility Model Content

[0004] The purpose of this application is to provide a battery device and electrical equipment to improve the problem that the equalization circuit is set in the sampling board in the existing method, which makes it difficult to dissipate heat from the sampling board.

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

[0006] Battery cell assembly;

[0007] Sampling plate;

[0008] A voltage equalizer is used to equalize the voltage of the battery cell assembly;

[0009] The battery cell assembly is connected to the sampling board via a sampling harness, and the voltage equalizer is mounted on the sampling harness.

[0010] In the above implementation process, the voltage equalizer is set on the sampling harness, that is, the voltage equalizer is placed outside the sampling board. This reduces the limitation of the sampling board on the voltage equalizer in terms of heat dissipation, reduces the heat dissipation difficulty of the sampling board. The voltage equalizer is placed outside the sampling board, which reduces the impact of the heat generated by the voltage equalizer on the sampling board, and saves hardware space of the sampling board, reducing the area of ​​the sampling board.

[0011] Optionally, the sampling harness is arranged in space along the length of the battery device, and the voltage equalizer is arranged along the length of the sampling harness. This effectively saves space and ensures effective heat dissipation.

[0012] Optionally, the sampling harness is arranged within the space along the width direction of the battery device, and the voltage equalizer is arranged along the length direction of the sampling harness. This can accommodate changes in the position between the battery cell assembly and the sampling plate in different battery devices. If the battery cell assembly and the sampling plate are located on both sides of the battery device along the width direction, then arranging the sampling harness along the width direction and the voltage equalizer along the length direction of the sampling harness can save space.

[0013] Optionally, the sampling harness includes multiple sampling lines, and the positive and negative terminals of each battery cell in the battery cell assembly are connected to the sampling board through the sampling lines. Each sampling line is connected in series with the voltage equalizer. This allows for voltage equalization of each battery cell.

[0014] Optionally, when the sampling harness is arranged within the space along the length of the battery device, the voltage equalizers connected in series on each sampling line are staggered along the width of the battery device; or, when the sampling harness is arranged within the space along the width of the battery device, the voltage equalizers connected in series on each sampling line are staggered along the length of the battery device. This arrangement can save internal space in the battery device and also optimize heat dissipation.

[0015] Optionally, the voltage equalizers connected in series on two adjacent sampling lines do not overlap in the width or length direction. This saves space in the battery device in the width or length direction, thereby reducing the width of the battery device.

[0016] Optionally, the voltage equalizers connected in series on each sampling line are arranged in a stepped manner along the width or length of the battery device. By adopting a stepped distribution strategy, the orderly arrangement of the voltage equalizers connected in series on each sampling line along the width or length of the battery device can be ensured. This layout not only avoids mutual interference and heat accumulation between voltage equalizers, achieving uniform heat dissipation, but also optimizes heat dissipation and improves the space utilization of the battery device.

[0017] Optionally, the distance between each of the voltage equalizers and the sampling plate is greater than a set distance.

[0018] In the above implementation process, by allowing the distance between the voltage equalizer and the sampling board to be greater than a set distance, the impact of the heat dissipation of the voltage equalizer on the components on the sampling board can be reduced.

[0019] Optionally, the voltage equalizer is a thermal resistance wire, a resistor, or a fuse. Using these devices to achieve voltage equalization makes it suitable for battery systems requiring voltage balancing.

[0020] Optionally, when the voltage equalizer is a thermal resistor or a fuse, a portion or all of the sampling line bundle may be the voltage equalizer. A thermal resistor or fuse can be used to replace part of the sampling line segment, i.e., a thermal resistor or fuse can be inserted into the sampling line, thus saving on the wiring cost of the sampling line. If the entire sampling line is a thermal resistor or fuse, there is no need for separate sampling line segments, simplifying the wiring structure.

[0021] Secondly, 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 the first type of battery device provided in the embodiments of this application;

[0025] Figure 2 This is a schematic diagram of the structure of the second type of battery device provided in the embodiments of this application;

[0026] Figure 3 This is a schematic diagram of the structure of the third battery device provided in the embodiments of this application;

[0027] Figure 4 This is a schematic diagram of the structure of the fourth battery device provided in the embodiments of this application;

[0028] Figure 5 This is a schematic diagram of the structure of the fifth battery device provided in the embodiments of this application;

[0029] Figure 6 This is a schematic diagram of the structure of an electrical device provided in an embodiment of this application.

[0030] Icons: 100 - Battery device; 110 - Battery cell assembly; 120 - Sampling board; 130 - Voltage equalizer; 200 - Electrical equipment. Detailed Implementation

[0031] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] In this application, "multiple" means two or more (including two).

[0037] Currently, resistive passive balancing circuits are widely used in battery systems for voltage equalization. These circuits typically include multiple balancing resistors, each balancing the voltage of a single battery cell. This balancing circuit is usually housed in a sampling board; however, limited space in the sampling board makes heat dissipation of these balancing resistors challenging. Furthermore, if the sampling board is exposed to high temperatures for extended periods, its performance may degrade, impacting battery safety.

[0038] Based on the above-mentioned technical problems, this application provides a battery device in which the battery cell assembly is connected to the sampling board through a sampling harness, and the voltage equalizer is set on the sampling harness, that is, the voltage equalizer is placed outside the sampling board. This can reduce the limitation of the sampling board on the voltage equalizer in terms of heat dissipation, reduce the difficulty of heat dissipation, and save hardware space of the sampling board and reduce the area of ​​the sampling board.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] Please refer to Figure 1 , Figure 1This is a schematic diagram of the structure of a battery device 100 provided in an embodiment of this application. The battery device 100 includes a battery cell assembly 110, a sampling plate 120, and a voltage equalizer 130. The battery cell assembly 110 is connected to the sampling plate 120 via a sampling harness, and the voltage equalizer 130 is disposed on the sampling harness.

[0048] The battery cell assembly 110 may include multiple battery cells, and the sampling board 120 may be connected between the positive and negative terminals of the battery cell assembly 110, and may be connected to both ends of each battery cell via a sampling harness. In practical applications, the sampling board 120 may be integrated into a battery management system (BMS).

[0049] The positive and negative terminals of each battery cell can be connected to the sampling board 120 via sampling lines. The sampling board 120 can integrate some control circuits, sampling circuits, etc. The control circuits can be used to collect information such as voltage and current of each battery cell.

[0050] The voltage equalizer 130 is used to equalize the voltage of the battery cell assembly 110 so that the voltage of each battery cell in the battery cell assembly 110 is basically the same.

[0051] The voltage equalizer 130 can be connected in parallel with the battery cell assembly 110, allowing the voltage of each battery cell to be adjusted via the voltage equalizer 130, thus achieving voltage equalization. The principle of voltage equalization is that when the control circuit (such as the battery management system) on the sampling board 120 detects a high voltage in a battery cell, the control circuit will control the switching circuit to conduct, allowing the battery cell to discharge through the voltage equalizer 130, releasing excess electrical energy as heat, thereby lowering the voltage of that battery cell. The control circuit continuously monitors the voltage of each battery cell; once the voltage of a battery cell drops to the normal range, the control circuit will close the discharge circuit of the voltage equalizer 130, stopping energy consumption.

[0052] In this scheme, the voltage equalizer 130 is placed on the sampling harness, which is outside the sampling board 120. This allows the voltage equalizer 130 to be placed outside the sampling board 120, which simplifies the wiring and circuit structure on the sampling board 120 and saves space on the sampling board 120.

[0053] Furthermore, if the equalization circuit is placed on the sampling board 120, the board temperature will limit the equalization current, which cannot meet the equalization requirements of large-capacity cells. However, if the voltage equalization component 130 is placed outside the sampling board 120, passive equalization under high current mode can be met.

[0054] The sampling board 120, abbreviated as CSC (Cell Supervision Circuit), is used to collect key information such as voltage and temperature of each battery cell and transmit this information to the battery management system (BMS). The BMS uses this information for battery safety management. The control circuit in the sampling board 120 performs voltage equalization operations according to the instructions of the BMS to ensure that the voltage of each battery cell remains consistent, thereby extending battery life.

[0055] The sampling board 120 typically adopts a modular design, which can be easily installed on the side or above the battery cell assembly 110, simplifying the design of the battery sampling line. Furthermore, the modular design makes the maintenance and replacement of the sampling board 120 easier.

[0056] In the above implementation process, the voltage equalizer 130 is set on the sampling harness, that is, the voltage equalizer 130 is placed outside the sampling board 120. This can reduce the limitation of the sampling board 120 on the heat dissipation of the voltage equalizer 130, reduce the heat dissipation difficulty of the sampling board 120. The voltage equalizer 130 is placed outside the sampling board 120, which can reduce the impact of the heat generated by the voltage equalizer 130 on the sampling board 120, and can also save hardware space of the sampling board 120 and reduce the area of ​​the sampling board 120.

[0057] Based on the above embodiments, the voltage equalizer 130 can be a thermal resistance wire, a resistor, or a fuse.

[0058] Among them, the thermal resistance wire has high impedance and heat resistance, which can effectively dissipate the voltage during the equalization process through heat. In addition, the thermal resistance wire can withstand large currents (such as 500mA) without being easily damaged, so it is suitable for battery systems that require large equalization currents.

[0059] Resistors have a lower production cost, so using resistors as voltage equalizers can reduce costs.

[0060] The fuse has overcurrent protection; when the current exceeds its rated value, the fuse will blow, thus cutting off the circuit. Therefore, using a fuse as a voltage equalizer 130 can improve the safety of the entire battery system. However, to reduce the risk of fire caused by a blown fuse, the current of each battery cell can be monitored at all times. Once the current exceeds a set threshold (which can be less than the fuse's rated value), the equalization circuit is immediately cut off, i.e., the connection between the battery cell and the sampling board 120 is severed. This disconnects the circuit before the current reaches the fuse's rated value, reducing the likelihood of the fuse blowing due to excessive current.

[0061] When the voltage equalizer 130 is set on the sampling harness, its two ends can be connected to the two ends of the sampling line. For example, the sampling line is divided into two segments, segment 1 and segment 2. One end of segment 1 is connected to the positive terminal of the battery cell, and the other end of segment 1 is connected to one end of the voltage equalizer 130. The other end of the voltage equalizer 130 is connected to one end of segment 2, and the other end of segment 2 is connected to the sampling board 120. In addition, the negative terminal of the battery cell is connected to the sampling board 120 through the sampling line. In this way, the voltage equalizer 130 and the battery cell can be connected in parallel.

[0062] Based on the above embodiments, when the voltage equalizer 130 is a thermal resistance wire or a fuse, a portion or all of the sampling harness segments are voltage equalizer 130 segments.

[0063] Understandably, the sampling harness includes multiple sampling lines. When the voltage equalizer 130 is a thermal resistance wire or a fuse, a thermal resistance wire or a fuse can be used to replace part of the sampling line segment, that is, a thermal resistance wire or a fuse can be inserted into the sampling line, which can save the wiring cost of the sampling line.

[0064] Alternatively, the sampling line can be replaced by a thermal resistor or a fuse. That is, the entire sampling line is a thermal resistor or a fuse, which eliminates the need for a separate sampling line segment and simplifies the wiring structure.

[0065] Based on the above embodiments, the sampling harness is arranged in the space along the length direction of the battery device 100, and the voltage equalizer 130 is arranged along the length direction of the sampling harness.

[0066] The sampling harness is laid out along the length of the battery device 100. For example, if the battery cell assembly 110 is laid out on the left side of the battery device 100 and the sampling plate 120 is laid out on the right side of the battery device 100, the sampling harness can run from left to right to ensure that the sampling harness can cover all battery cells.

[0067] The voltage equalizer 130 is positioned along the length of the sampling harness, which effectively saves space and ensures effective heat dissipation. The material and shape of the voltage equalizer 130 can be selected according to actual conditions to improve heat dissipation efficiency. This layout helps reduce the size of the battery device 100 and improves the overall compactness and integration of the battery device 100.

[0068] Understandably, when planning the overall layout, the positional relationship between the battery cell assembly 110 and the sampling plate 120 can be considered so that the sampling harness can be deployed in the gap between the battery cell assembly 110 and the sampling plate 120, so as to make more reasonable use of the space within the battery device 100 and improve its space utilization.

[0069] In some other embodiments, in order to accommodate the positional changes between the battery cell assembly 110 and the sampling plate in different battery devices 100, the sampling harness can be arranged in the space along the width direction of the battery device, and the voltage equalizer 130 is arranged along the length direction of the sampling harness.

[0070] For details, please refer to Figure 2 As shown, the sampling plate 120 and the battery cell assembly 110 are respectively disposed on both sides of the battery device 100 in the width direction. In this case, the sampling harness is connected between the sampling plate 120 and the battery cell assembly 110, i.e., it is arranged along the width direction. Thus, the voltage equalizer 130 is disposed on the sampling harness, and the length direction of the sampling harness is the width direction of the battery device, so the voltage equalizer 130 is disposed along the length direction of the sampling harness. Figure 1 The difference is, Figure 1 The sampling harness is laid out along the length of the battery device 100, and the length direction of the sampling harness is the same as the length direction of the battery device 100. This can accommodate changes in the position between the battery cell assembly 110 and the sampling plate 120 within different battery devices 100. If the battery cell assembly 110 and the sampling plate 120 are located on both sides of the battery device 100 along the width direction, the sampling harness is laid out along the width direction, and the voltage equalizer 130 is laid out along the length direction of the sampling harness, which can save space.

[0071] Based on the above embodiments, the sampling harness includes multiple sampling lines. The positive and negative terminals of each battery cell in the battery cell assembly 110 are connected to the sampling board 120 through the sampling lines, and a voltage equalizer 130 is connected in series on each sampling line.

[0072] like Figure 3 As shown, each battery cell has a sampling line connected to one end of its positive and negative terminals, and the other end of the sampling line is connected to the sampling board 120. Each sampling line is connected in series with a voltage equalizer 130, so that the voltage of each battery cell can be equalized by the voltage equalizer 130.

[0073] Understandably, in practical applications, the control circuit in the sampling board 120 can collect the voltage of each battery cell. When voltage equalization is required, for example, if the voltage of a certain battery cell is higher than the voltage of other battery cells by a certain threshold, the control circuit can control the voltage equalizer 130 on the sampling line connected to that battery cell to work, thereby reducing the voltage of that battery cell through the voltage equalizer 130.

[0074] The control circuit can control the voltage equalizer 130 to turn on or off via a switching circuit, such as a switch or relay. When the sampling line is connected to the sampling board 120, it can be connected to the switching circuit on the sampling board 120. Each sampling line can be connected to a switching circuit. Thus, when the control circuit needs to equalize the voltage of a specific battery cell, it closes the switching circuit, allowing the voltage equalizer 130 on the sampling line to equalize the voltage. If voltage equalization is not needed, the switching circuit is opened, and the voltage equalizer 130 becomes an open circuit, thus not operating and not requiring voltage equalization. Therefore, this control method can achieve the on / off control of the voltage equalizer 130 to realize voltage equalization.

[0075] Based on the above embodiments, when the sampling harness is arranged in the space along the length direction of the battery device 100, the voltage equalizers 130 connected in series on each sampling line can be staggered along the width direction of the battery device 100.

[0076] The length direction of the battery device 100 can be understood as the horizontal direction of the battery device 100 in its natural placement state, or as the direction along which the longest or main dimension of the battery device 100 extends. The width direction can be understood as the direction perpendicular to the length direction. For example, if the length direction is horizontal, then the width direction is vertical.

[0077] In the horizontal direction, the battery cell assembly 110 within the battery device 100 can be deployed on the left side, and the sampling plate 120 on the right side. Of course, the deployment positions of the battery cell assembly 110 and the sampling plate 120 can be interchanged, and they can be placed on opposite sides of the battery device 100. In this way, the sampling harness is laid out along the length direction.

[0078] The staggered arrangement can be understood as follows: in the width direction, the voltage equalizers 130 are not simply arranged in a straight line, but are intentionally deviated from the straight line to optimize heat dissipation or optimize spatial layout.

[0079] Since the voltage equalizer 130 has a certain length, the staggered arrangement of the voltage equalizer 130 in the width direction can be understood as the line formed by connecting the center points of each voltage equalizer 130 is not a vertical line. For example, the voltage equalizer 130 can be arranged alternately left and right in the width direction. For instance, the center line of the first voltage equalizer 130 can be located at a certain vertical position, while the center line of the immediately following second voltage equalizer 130 is offset to the left or right by a certain distance. This offset can be fixed or variable to form a specific positional distribution.

[0080] Alternatively, in other embodiments, when the sampling harness is laid out in the space along the width direction of the battery device 100, the voltage equalizers 130 connected in series on each sampling line are incorrectly positioned along the length direction of the battery device.

[0081] The misalignment at this point can be understood as follows: in the length direction, the voltage equalizers 130 are not simply arranged in a straight line, but are intentionally deviated from the straight line to optimize heat dissipation or spatial layout.

[0082] The staggered arrangement of the voltage equalizers 130 along their length can be understood as the line formed by connecting the center points of each voltage equalizer 130 not being a horizontal line. For example, the voltage equalizers 130 can be arranged alternately vertically along their length. For instance, the center line of the first voltage equalizer 130 can be located at a certain horizontal position, while the center line of the immediately following second voltage equalizer 130 is offset upwards or downwards by a certain distance. This offset can be fixed or variable to form a specific positional distribution.

[0083] Based on the above embodiments, to achieve uniform heat dissipation and save space, the voltage equalizers 130 can be staggered from left to right in the width direction. For example, the voltage equalizers 130 connected in series on two adjacent sampling lines do not overlap in the width direction. This saves space in the width direction of the battery device 100, thereby reducing the width of the battery device 100.

[0084] To ensure that the positions of two adjacent voltage equalizers 130 do not overlap in the width direction, a staggered layout can be adopted. For example, the voltage equalizer 130 on the first sampling line may be located on one side of the width direction of the battery device 100, while the voltage equalizer 130 on the adjacent second sampling line may be located on the other side, and so on. This layout can ensure the spatial spacing between the voltage equalizers 130, which can reduce heat accumulation and mutual interference.

[0085] Another layout approach is to make a slight offset of the voltage equalizer 130 in the width direction. For example, the voltage equalizer 130 on the first sampling line is located at a certain reference point, while the voltage equalizer 130 on the adjacent second sampling line is offset to the left or right by a certain distance based on the reference point. This offset should be large enough to ensure that the adjacent voltage equalizers 130 do not overlap each other, while maintaining a reasonable spacing to optimize heat dissipation.

[0086] like Figure 4As shown, in the vertical direction, the voltage equalizers 130 can be staggered and arranged on the sampling line bundle from left to right. For example, the voltage equalizer 130 on the top first sampling line is arranged at the leftmost position, and the voltage equalizer 130 on the top second sampling line is arranged at a slightly right position. In this way, the voltage equalizers 130 are staggered in the vertical direction, which can save space in the vertical direction of the battery device 100.

[0087] Alternatively, in the length direction, the voltage equalizers 130 can be staggered from top to bottom. For example, the voltage equalizers 130 connected in series on two adjacent sampling lines do not overlap in the length direction. The specific arrangement is similar to the staggered arrangement in the width direction described above, and will not be elaborated further here for the sake of brevity. This saves space in the length direction of the battery device 100, thereby reducing the length of the battery device 100.

[0088] In the above implementation process, in order to achieve uniform heat dissipation in the entire space where the sampling harness is located, the voltage equalizers 130 connected in series on each sampling line are distributed in a stepped manner along the width direction of the battery device 100.

[0089] The width and length of the battery device 100 can be obtained in advance, and then a position can be assigned to the voltage equalizer 130 on each sampling line in combination with the width and length, so as to ensure that each voltage equalizer 130 is arranged in a certain step height difference in the width direction of the battery device 100, such as the voltage equalizer 130 being distributed from left to right.

[0090] The height difference between adjacent voltage equalizers 130 can be determined based on the width of the battery device 100, the spacing of the sampling lines, and the dimensions of the voltage equalizers 130. The voltage equalizers 130 can then be arranged from left to right in a stepped distribution along their width. For example, the voltage equalizer 130 on the first sampling line might be located at a higher position, while the voltage equalizer 130 on the adjacent second sampling line might be located at a lower position, and so on. Figure 5 As shown.

[0091] Alternatively, the voltage equalizers 130 connected in series on each sampling line are distributed in a stepped manner along the length of the battery device 100. The specific distribution method can be similar to the stepped distribution method in the width direction mentioned above, and will not be elaborated further here for the sake of brevity.

[0092] In the above implementation process, by adopting a stepped distribution strategy, the voltage equalizers 130 connected in series on each sampling line can be ensured to be arranged in an orderly manner in the width or length direction of the battery device 100. This layout not only avoids mutual interference and heat accumulation between the voltage equalizers 130, achieving uniform heat dissipation, but also optimizes the heat dissipation effect and improves the space utilization of the battery device 100.

[0093] Based on the above embodiments, when arranging the voltage equalizer 130, the impact on heat dissipation of the sampling board 120 is also considered. Therefore, the distance between each voltage equalizer 130 and the sampling board 120 can be greater than the set distance. The value of the set distance can be flexibly selected based on the following considerations: for example, the voltage equalizer 130 will generate heat when working, so it is necessary to ensure that there is a sufficient distance between it and the sampling board 120 to prevent heat accumulation and avoid overheating from affecting the performance and lifespan of the sampling board 120 and other components.

[0094] For example, if the voltage equalizer 130 is arranged in a stepped manner in the width direction of the battery device 100 as in the example above, and the sampling plate 120 is located on the right side of the battery device 100, then the distance between the rightmost voltage equalizer 130 and the sampling plate 120 can be greater than the set distance. In this way, the distance between the other voltage equalizers 130 and the sampling plate 120 is also greater than the set distance.

[0095] This ensures that the heat dissipated by the voltage equalizer 130 can reduce its impact on other components on the sampling board 120. Therefore, when arranging the voltage equalizer 130, the rightmost voltage equalizer 130 can be arranged first, and then the other voltage equalizers 130 can be arranged in a staggered manner with the rightmost voltage equalizer 130 as the reference.

[0096] The distance setting can be flexibly set according to actual needs. For example, 1cm means that the distance between the voltage equalizer 130 and the sampling plate 120 should be greater than 1cm.

[0097] In the above implementation process, by allowing the distance between the voltage equalizer 130 and the sampling board 120 to be greater than a set distance, the impact of the heat dissipation of the voltage equalizer 130 on the components on the sampling board 120 can be reduced.

[0098] Based on the above embodiments, in order to improve stability and durability, a protective sleeve or wire sheath can be provided outside the voltage equalizer 130 or the sampling line. The protective sleeve or wire sheath should have high thermal conductivity to dissipate the heat generated by the wire harness and the voltage equalizer 130.

[0099] Please refer to Figure 6 , Figure 6This 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.

[0100] 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.

[0101] 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.

[0102] 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.

[0103] 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.

[0104] In summary, the embodiments of this application provide a battery device and an electrical device. The voltage equalizer is disposed on the sampling harness, that is, the voltage equalizer is placed outside the sampling board. This reduces the limitation of the sampling board on the voltage equalizer in terms of heat dissipation, reduces the heat dissipation difficulty of the sampling board, and saves hardware space of the sampling board, reducing the area of ​​the sampling board.

[0105] 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 by, The battery device comprises: a battery cell assembly; a sampling plate; a voltage equalization element for voltage equalization of the battery cell assembly; wherein the battery cell assembly is connected to the sampling plate through a sampling harness, and the voltage equalization element is arranged on the sampling harness.

2. The battery device according to claim 1, characterized by The sampling harness is arranged in a space along a length direction of the battery device, and the voltage equalization element is arranged along a length direction of the sampling harness.

3. The battery device of claim 1, wherein The sampling harness is arranged in a space along a width direction of the battery device, and the voltage equalization element is arranged along a length direction of the sampling harness.

4. The battery device of claim 1, wherein The sampling harness comprises a plurality of sampling lines, and the positive and negative electrodes of each battery cell in the battery cell assembly are connected to the sampling plate through a sampling line, and the voltage equalization element is connected in series on each sampling line.

5. The battery device of claim 4, wherein, In the case that the sampling harness is arranged in a space along a length direction of the battery device, the voltage equalization elements connected in series on each sampling line are arranged staggered along a width direction of the battery device. Alternatively, in the case that the sampling harness is arranged in a space along a width direction of the battery device, the voltage equalization elements connected in series on each sampling line are arranged staggered along a length direction of the battery device.

6. The battery device of claim 5, wherein The voltage equalization elements connected in series on two adjacent sampling lines do not overlap in the width direction or the length direction.

7. The battery device of claim 6, wherein The voltage equalization elements connected in series on each sampling line are arranged in a stepped distribution along the width direction or the length direction of the battery device.

8. The battery device of claim 4, wherein, The distance between each voltage equalization element and the sampling plate is greater than a set distance.

9. The battery device of claim 1, wherein, The voltage equalization element is a thermal resistance wire, a resistor or a fuse.

10. The battery device of claim 9, wherein, In the case that the voltage equalization element is a thermal resistance wire or a fuse, part or all of the sampling harness is the voltage equalization element.

11. An electrical device, characterized by The power consuming device comprises the battery device of any one of claims 1-10, and the battery device is used to provide power for the power consuming device.

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