A battery device, a battery pack, and an electric device
By installing an insulating plate and an insulating adhesive layer on the battery casing, the problem of vibration failure in the connection area between the terminal post and the busbar is solved, achieving connection stability and insulation, reducing the risk of thermal runaway, and ensuring battery safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CALB GROUP CO LTD
- Filing Date
- 2025-07-18
- Publication Date
- 2026-07-03
Smart Images
Figure CN224458304U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery technology, and in particular to a battery device, battery pack and electrical equipment. Background Technology
[0002] A battery pack typically consists of multiple individual cells, whose terminals are welded to a busbar to achieve series or parallel connection between the individual cells.
[0003] In practical applications, battery packs are often subject to vibration, which can cause impacts at the connection between the terminals and the busbars. This can lead to failure of the welded area between the terminals and the busbars, resulting in safety risks such as thermal runaway. Utility Model Content
[0004] This application provides a battery device, battery pack, and electrical equipment to solve the problem of easy failure in the welding area between the terminal and the busbar.
[0005] On one hand, this application provides a battery device, including:
[0006] At least two individual cells, each individual cell including a housing, with terminals disposed on a first wall of the housing;
[0007] A busbar, wherein the busbar is electrically connected to the terminals of at least two of the individual cells to connect at least two of the individual cells in series or in parallel;
[0008] An insulating board is provided on the first wall, and an opening is provided on the insulating board to penetrate the insulating board. The area of the opening projected onto the first wall is S1.
[0009] A connector that connects two adjacent individual batteries and covers the clearance opening; the area of the connector's orthographic projection toward the first wall is S2.
[0010] An insulating adhesive layer, at least partially located within the clearance opening, the insulating adhesive layer connecting the first wall and the connector, the volume resistivity of the insulating adhesive layer being k;
[0011] in, 6.5×10 -16 (Ω·cm) -1 -3.2×10 -12 (Ω·cm) -1 .
[0012] Secondly, this application provides a battery pack including the battery device described in any of the first aspects.
[0013] Thirdly, this application provides an electrical device, including an electrical appliance and a battery device as described in any of the first aspects or a battery pack as described in the second aspect, wherein the battery device or the battery pack is used to supply power to the electrical appliance.
[0014] The battery device, battery pack, and electrical equipment provided in this application include at least two individual cells, a busbar, an insulator, a connector, and an insulating adhesive layer. The busbar is connected to the terminals of at least two individual cells to achieve series or parallel connection between the individual cells. An insulating plate covers the first wall of the individual cell casing. An opening of area S1 is provided on the insulating plate, allowing the corresponding area of the first wall to be exposed. The insulating adhesive layer is at least partially located within the opening and connects the first wall and the connector to connect adjacent individual cells. The volume resistivity of the insulating adhesive layer is k. The area of overlap between the connector and the first wall is S2. The insulating adhesive layer is directly bonded to the high-strength first wall. 6.5×10 -16 (Ω·cm) -1 -3.2×10 -12 (Ω·cm) -1 This ensures a good connection strength between the connector and the first wall, without affecting the insulation between the terminal and the casing. When the battery device vibrates, the connector and the insulating layer can effectively limit the relative position of two adjacent individual cells, reducing the impact on the connection area between the busbar and the terminal, thereby reducing the probability of connection failure between the busbar and the terminal and effectively reducing the safety risks such as thermal runaway. Attached Figure Description
[0015] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.
[0016] Figure 1 This is a schematic diagram of the structure of the battery device provided in the embodiments of this application;
[0017] Figure 2 This is a schematic diagram of the structure of a single battery cell in the battery device provided in the embodiments of this application;
[0018] Figure 3 A partial cross-sectional view of the battery device provided in an embodiment of this application;
[0019] Figure 4 A schematic diagram of a first embodiment of the assembly of a single cell and an insulating plate in a battery device provided in this application;
[0020] Figure 5 for Figure 4 A top view of a single cell in the image;
[0021] Figure 6 A schematic diagram illustrating a second embodiment of the assembly of a single cell and an insulating plate in the battery device provided in this application;
[0022] Figure 7 A schematic diagram illustrating a third embodiment of the assembly of a single cell and an insulating plate in a battery device provided in this application.
[0023] Figure 8 This is a schematic diagram of a fourth embodiment of the assembly of a single cell and an insulating plate in the battery device provided in this application.
[0024] Explanation of reference numerals in the attached figures:
[0025] 100-cell battery;
[0026] 110 - Casing;
[0027] 111 - First Wall;
[0028] 120-Pole Column;
[0029] 200 - Insulation board;
[0030] 210-Avoidance Exit;
[0031] 211-First clearance hole;
[0032] 212 - Second clearance hole;
[0033] 300-busbar;
[0034] 400 - Connector;
[0035] 500 - Insulating adhesive layer.
[0036] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation
[0037] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.
[0038] As described in the background section, a battery pack typically contains multiple individual cells, which are connected in series or parallel via busbars. The terminals and busbars are usually welded together. Due to the welding process, the welds in some areas may be relatively weak. When subjected to the impact of battery pack vibration or thermal cycling, these areas are extremely prone to partial or complete failure, increasing resistance. This not only leads to a decrease in battery performance but also makes it extremely easy to trigger more serious safety issues such as thermal runaway.
[0039] To address the aforementioned technical problems, this application provides a battery device. An insulating plate is provided on the first wall of the casing of a single battery cell, and a clearance opening with an area of S1 is added to the insulating plate. An insulating adhesive layer with a volume resistivity of k is provided within the clearance opening. A connector is connected to the first wall via the insulating adhesive layer, and the connector simultaneously connects to the first walls of at least two single batteries to restrict the relative positions of the two single batteries. Furthermore, the area of overlap between the connector and the first wall is S2. 6.5×10 -16 (Ω·cm)⁻¹ - 3.2 × 10⁻¹ -12 (Ω·cm) -1 This design ensures high stability of the connection between the connector and the first wall without affecting the insulation between the pole and the housing. Thus, the cooperation between the connector, the insulating layer, and the first wall effectively reduces the risk of connection failure between the busbar and the pole.
[0040] It should be noted that the battery device can be used inside a battery pack or used directly; this application does not limit its application.
[0041] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will be described below with reference to the accompanying drawings.
[0042] This application provides a battery device; please refer to [link / reference]. Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, it includes a single battery cell 100 and a busbar 300.
[0043] The single-cell battery 100 has a housing 110 and terminals 120. The terminals 120 are disposed on the first wall 111 of the housing 110, which is generally made of metal. Typically, the housing 110 has a cavity for accommodating the electrode core, and one end of the cavity is closed by a cover plate. The first wall 111 can be the cover plate or other side of the housing 110, as long as the terminals 120 are provided and the conductive connection between the terminals 120 and the electrode core is not affected. Of course, the terminals 120 are divided into positive terminals and negative terminals. At the same time, an explosion-proof valve can also be installed on the first wall 111 to release pressure from the single-cell battery and improve the safety of the single-cell battery.
[0044] The electrode core plays a crucial role in a single-cell battery. It stores energy during charging and releases energy during discharging through electrochemical reactions. The electrode core typically consists of multiple positive electrode plates, negative electrode plates, a separator, and an electrolyte. The active materials for the positive electrode plates are usually lithium cobalt oxide (LiCoO2), lithium iron phosphate (LiFePO4), lithium nickel manganese cobalt oxide (NMC), lithium nickel cobalt aluminum oxide (NCA), etc. The active materials for the negative electrode plates are usually graphite, silicon-based materials, lithium titanate (LTO), etc. The separator can be made of polyethylene (PE), polypropylene (PP), or their composite materials.
[0045] There are at least two individual cells 100, such as two, three, four, five or even more, as long as multiple individual cells 100 are arranged side by side in sequence. The busbar 300 realizes the series or parallel connection of at least two individual cells 100 by connecting to the terminal post 120, for example, by connecting to the terminal post 120 by common methods such as welding or riveting.
[0046] Specifically, the busbar 300 can be a bus or a connecting strip, both made of conductive metal materials, such as copper or aluminum.
[0047] Taking a bus as an example, the positive terminal of one individual battery 100 can be connected to the negative terminal of the next individual battery 100 through the bus, thereby connecting two individual batteries 100 in series to increase the total voltage. Alternatively, the positive and negative terminals of multiple individual batteries 100 can be connected together through the bus, thereby connecting multiple individual batteries 100 in parallel to increase the total capacity.
[0048] The battery device also includes an insulating plate 200, a connector 400, and an insulating adhesive layer 500.
[0049] The insulating plate 200 is located outside the first wall 111, at least on the side of the first wall 111 away from the pole core. It can achieve insulation between the pole post 120 and the first wall 111, as well as insulation between the bus 300 and the first wall 111. It needs to cover a large area, usually covering the entire outer surface of the first wall 111 away from the pole core.
[0050] The insulating board 200 can be made of common insulating materials such as plastic, ceramic or composite materials, as long as it can effectively provide insulation.
[0051] An opening 210 is provided on the insulating plate 200. The opening 210 penetrates the insulating plate 200, so that the surface of the first wall 111 can be exposed through the opening 210. Insulating adhesive is applied to the first wall 111 through the opening 210, connecting the first wall 111 and the connector 400. The insulating adhesive is coated to a certain thickness to form an insulating adhesive layer 500, which can extend beyond the opening 210.
[0052] The connector 400 is connected to the first wall 111 of at least two individual cells 100 simultaneously through the insulating adhesive layer 500, thereby effectively limiting the relative position between the corresponding individual cells 100 through the cooperation between the connector 400, the insulating adhesive and the first wall 111.
[0053] By setting an avoidance opening 210 on the insulating plate 200 to expose the first wall 111, and directly bonding the connector 400 to the first wall 111 with insulating adhesive, the relative position between the individual cells 100 can be effectively restricted, the impact force on the connection area between the busbar 300 and the terminal post 120 can be reduced, thereby reducing the probability of connection failure between the busbar 300 and the terminal post 120, ensuring the overcurrent effect between the busbar 300 and the terminal post 120, and avoiding safety risks such as excessive heat generation or thermal runaway.
[0054] Among them, the area of the orthographic projection of the clearance 210 on the outer surface of the first wall 111 is S1, and the area of the orthographic projection of the overlapping area of the connector 400 and the first wall 111 on the outer surface of the first wall 111 is S2. Of course, S1 and S2 are both orthographic projections on the surface of the first wall 111 away from the pole core. The volume resistivity of the insulating adhesive layer 500 is k (the ability of the insulating adhesive layer to resist current passing through its volume; a high volume resistivity indicates that the insulating adhesive layer has good insulation performance).
[0055] At this time, it can be made 6.5×10 -16 (Ω·cm) -1 -3.2×10 -12 (Ω·cm) -1Within this range, on the one hand, the bonding strength between the connector 400 and the first wall 111 is appropriate. When the battery device is subjected to vibration, the connector 400 can help limit the relative position between the individual cells 100 connected to it, so as to greatly reduce the impact on the connection area between the terminal post 120 and the busbar 300, thereby effectively improving the connection stability between the terminal post 120 and the busbar 300. On the other hand, it can maintain stable insulation between the terminal post 120 and the first wall 111, avoid direct electrical connection between the terminal post 120 and the first wall 111, thereby avoiding short circuit of the individual cells 100, so as to effectively ensure that the battery device can work normally.
[0056] And if Less than 6.5×10 -16 (Ω·cm) -1 The poor bonding strength between the connector 400 and the first wall 111 means that when the battery device is subjected to vibration, the connection strength between the connector 400 and the first wall 111 is relatively small. The individual batteries 100 connected by the connector 400 will still shake, and the connection area between the busbar 300 and the terminal 120 will still bear a large force. This can easily lead to the failure of the connection between the busbar 300 and the terminal 120, resulting in poor current carrying capacity between the busbar 300 and the terminal 120. Excessive heat generation during battery device use can easily lead to safety risks such as thermal runaway.
[0057] And if Greater than 3.2×10 -12 (Ω·cm) -1 Insulation failure can easily occur between the terminal 120 and the first wall 111, resulting in electrical connection between the terminal 120 and the first wall 111, causing a short circuit in the single cell 100 and affecting the normal use of the battery device.
[0058] It should be noted that, in order to further improve the stability of the connection between the busbar 300 and the pole post 120, the busbar 300 and the first wall 111 can also be bonded together with the insulating adhesive layer 500. The specific setting method is similar to the connection method between the connector 400 and the first wall 111, and will not be described in detail here.
[0059] Of course, when setting the clearance opening 210, it is necessary to ensure that the clearance opening 210 and the pole post 120 are kept at a certain distance to avoid insulation failure.
[0060] In some embodiments of this application, the thickness h of the insulating adhesive layer 500 is 0.05mm-0.6mm.
[0061] Specifically, if the insulating adhesive layer is too thin (500mm), it will affect the bonding effect, while if it is too thick, it will easily lead to stress concentration and bonding failure. Furthermore, excessive thickness will increase weight and cost. A thickness of 0.05mm-0.6mm (h) is suitable for the needs of most commonly used batteries, maintaining good bonding without wasting material.
[0062] It should be noted that when the size of the single cell 100 varies greatly, the thickness of the insulating adhesive layer 500 can be adjusted accordingly, and it is not necessarily limited to 0.05mm-0.6mm.
[0063] In some embodiments of this application, the volume resistivity k of the insulating adhesive layer 500 is 1×10⁻⁶. 11 (Ω·cm)-1×10 15 (Ω·cm).
[0064] When k is 1×10 11 (Ω·cm) -1 ×10 15 When the strength is (Ω·cm), it can effectively assist in insulation, and the processing difficulty of forming an insulating adhesive layer of 500 is not too high.
[0065] In practical applications, the appropriate type of insulating adhesive can be selected based on the required volume resistivity.
[0066] For example, the volume resistivity k of the epoxy resin adhesive is 1×10⁻⁶. 12 (Ω·cm)-1×10 15 (Ω·cm), an insulating layer of 500 formed by epoxy resin can be selected as needed.
[0067] For example, the volume resistivity k of silicone is 1×10⁻⁶. 13 (Ω·cm)-1×10 15 (Ω·cm), an insulating layer of 500 formed from silicone can be selected as needed.
[0068] For example, the volume resistivity k of the polyurethane adhesive should be 1 × 10⁻⁶. 11 (Ω·cm)-1×10 1514 (Ω·cm), the insulating layer can be formed by polyurethane adhesive 500 as needed.
[0069] For example, the volume resistivity of acrylic resin is 1×10⁻⁶. 11 (Ω·cm)-1×10 15 (Ω·cm), an insulating layer of 500 formed from acrylic adhesive can be selected as needed.
[0070] For some embodiments of this application, please refer to Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the clearance opening 210 includes a first clearance hole 211 located between the end of the insulating plate 200 and the pole post 120.
[0071] The first clearance hole 211 can be provided at only one end of the plate or at both ends of the plate, depending on the structure and insulation of the single cell 100.
[0072] One or more first clearance holes 211 can be provided. When multiple holes are provided, they can be arranged side by side, for example, multiple holes can be arranged sequentially along the length of the insulating plate 200 or multiple holes can be arranged sequentially along the width of the insulating plate 200.
[0073] By placing the first clearance hole 211 between the end of the insulating plate 200 and the terminal post 120, when the battery device shakes, the bonding area between the connector 400 and the first wall 111 can withstand greater force, thereby reducing the force on the connection area between the busbar 300 and the terminal post 120, and effectively reducing the probability of connection failure between the busbar 300 and the terminal post 120.
[0074] It should be noted that the distance between the clearance 210 and the pole 120 is generally 6mm-22mm. Within this range, the insulation effect between the pole 120 and the first wall 111 can be avoided, reducing the risk of short circuit.
[0075] Furthermore, the first clearance hole 211 can be set to any shape, such as a circle, an ellipse, a polygon, etc.
[0076] For example, the first clearance hole 211 is elongated, which is convenient for processing and arrangement, and has a large area.
[0077] For example, the elongated first clearance hole 211 extends from the end of the insulating plate 200 toward the pole post 120 (i.e., the length direction of the insulating plate 200), while the arrangement direction of the plurality of first clearance holes 211 is the width direction of the insulating plate 200.
[0078] At this time, the multiple first clearance holes 211 have at least two different lengths, namely from the middle of the pole post 120 to the edge of the pole post 120, the length of the first clearance holes 211 gradually increases, and the distance between the first clearance hole 211 adjacent to the middle of the pole post 120 and the pole post 120 can be greater than the distance between the first clearance hole 211 adjacent to the edge of the pole post 120 and the pole post 120, thereby ensuring the insulation effect between the pole post 120 and the first wall 111.
[0079] For example, the elongated first clearance hole 211 extends in the width direction of the insulating plate 200, while a plurality of first clearance holes 211 are arranged sequentially along the length direction of the insulating plate 200.
[0080] At this point, the total area of the first clearance hole 211 can be increased, and as long as the distance between the first clearance hole 211 and the pole post 120 is appropriate, the insulation effect can also be guaranteed.
[0081] Of course, the width of the first clearance hole 211 (the dimension along the length of the insulating plate 200) can be different. For example, the width of the first clearance hole 211 closer to the pole post 120 can be smaller, while the width of the first clearance hole 211 farther from the pole post 120 can be larger.
[0082] For example, multiple strip-shaped first clearance holes 211 extending along the length direction of the insulating plate 200 can be provided at both ends of the insulating plate 200.
[0083] For example, multiple strip-shaped first clearance holes 211 extending along the width direction of the insulating plate 200 can be provided at both ends of the insulating plate 200.
[0084] For example, a plurality of strip-shaped first clearance holes 211 extending along the length direction of the insulating plate 200 can be provided at one end of the insulating plate 200, and a plurality of strip-shaped first clearance holes 211 extending along the width direction of the insulating plate 200 can be provided at the other end of the insulating plate 200.
[0085] In some embodiments of this application, two pole posts 120 are provided on the first wall 111, and the clearance opening 210 further includes a second clearance hole 212 located between the two pole posts 120.
[0086] The two poles 120 are the positive pole and the negative pole, respectively. The positive pole and the negative pole are usually far apart and are generally located near the two ends of the first wall 111.
[0087] The second clearance hole 212 is located between the two pole posts 120, providing ample space. Therefore, the area of the second clearance hole 212 can be set to be larger, for example, it can be square or rectangular, or other shapes that fit the space between the two pole posts 120. Alternatively, the number of second clearance holes 212 can be increased accordingly to fully utilize the space between the two pole posts 120. This results in a larger bonding area between the insulating adhesive layer 500 and the first wall 111 and the connector 400, effectively improving the connection strength. This further reduces the impact force between the busbar 300 and the pole post 120, ensuring the connection effect between the busbar 300 and the pole post 120.
[0088] It should be noted that in some cases, both the first clearance hole 211 and the second clearance hole 212 can be provided simultaneously, as long as it allows... Maintain at 6.5×10 -16 (Ω·cm) -1 -3.2×10 -12 (Ω·cm) -1 At this time, it can ensure the connection strength between the connector 400 and the first wall 111, so as to better limit the relative position between the individual batteries 100 connected to the connector 400 and ensure the connection effect between the busbar 300 and the terminal 120. It can also make the insulating plate 200 and the insulating adhesive layer 500 work together to achieve a good insulation effect and avoid short circuit problems.
[0089] In practical applications, the area of the first wall 111 of most single-cell batteries 100 is within a certain range, while in S2 it is 200mm². 2 -2400mm 2 It can be adapted to the area of the first wall 111 of most single cells 100.
[0090] Furthermore, S1 is 100mm 2 -1200mm 2 Within this range, an effective connection can be achieved between the connector 400 and the first wall 111.
[0091] Alternatively, S1 / S2 can be set to 0.4-0.6. Within this range, the area of the clearance opening 210 is matched with the area of the connector 400 and the first wall 111. This ensures the bonding strength between the connector 400 and the first wall 111, effectively restricts the relative position between the connector 400 and the connected individual battery 100, and reduces the probability of connection failure between the terminal post 120 and the busbar 300. It also avoids excessively large exposed area of the first wall 111, thereby preventing electrical connection between the first wall 111 and the terminal post 120 and reducing the probability of short circuit.
[0092] If the ratio of S1 / S2 is too small, the area of the clearance 210 will be too small, and the connection area between the insulating adhesive layer 500 and the first wall 111 will be limited. This will result in poor bonding strength, which will lead to poor connection between the connector 400 and the first wall 111 and limited limiting effect on the connected single battery 100. At this time, the connection area between the busbar 300 and the terminal post 120 still needs to withstand a large force, which can easily lead to connection failure.
[0093] If the ratio of S1 / S2 is too large, the area of the first wall 111 exposed through the clearance opening 210 will be too large. Since the first wall 111 is usually made of metal, the insulation effect between the first wall 111 and the pole post 120, and between the first wall 111 and the busbar may be greatly affected. Although this problem can be improved to some extent by increasing the volume resistivity k of the insulating adhesive layer 500, it is difficult to achieve a large k value in terms of process.
[0094] This application also provides a battery pack, including the battery device in the above embodiments.
[0095] Specifically, the battery typically includes a tray in which the battery assembly is placed and can be restrained by longitudinal beams, transverse beams, etc., within the tray. Of course, the battery pack also includes other components for controlling battery temperature, such as a thermal management system, which are well known to those skilled in the art and will not be described in detail here.
[0096] This application also provides an electrical device, including an electrical device and a battery device or battery pack as described above, wherein the battery device and battery pack are used to supply power to the electrical device.
[0097] It should be noted that electrical equipment includes, but is not limited to, electric vehicles, hybrid vehicles, medical equipment, aerospace equipment, energy storage systems, and home electronic products that require power from batteries or battery packs.
[0098] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.
[0099] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.
Claims
1. A battery device, characterized by, include: At least two individual battery cells (100), each individual battery cell (100) includes a housing (110), and a terminal post (120) is disposed on a first wall (111) of the housing (110); A busbar (300) is electrically connected to the terminals (120) of at least two of the individual cells (100) to connect at least two of the individual cells (100) in series or in parallel. An insulating plate (200) is provided on the first wall (111), and the insulating plate (200) is provided with a clearance opening (210) that penetrates the insulating plate (200). The area of the clearance opening (210) projected onto the first wall (111) is S1. A connector (400) connects two adjacent individual batteries (100) and covers the clearance opening (210). The area of the connector (400) projected onto the first wall (111) is S2. An insulating adhesive layer (500) is at least partially located within the clearance opening (210), the insulating adhesive layer (500) connects the first wall (111) and the connector (400), and the volume resistivity of the insulating adhesive layer (500) is k. wherein, 6.5 x 10 -16 (Ω-cm) -1 -3.2 x 10 -12 (Ω-cm) -1 .
2. The battery device according to claim 1, characterized by The clearance opening (210) includes a first clearance hole (211), which is located between the end of the insulating plate (200) and the pole post (120).
3. The battery device of claim 2, wherein The first clearance hole (211) is a strip hole.
4. The battery device of claim 2, wherein Multiple first clearance holes (211) are provided, and the multiple first clearance holes (211) are arranged at intervals in sequence.
5. The battery device of claim 4, wherein The first clearance hole (211) extends along the length direction of the insulating plate (200), and at least two of the first clearance holes (211) have different lengths in the extension direction.
6. The battery device of claim 4, wherein The first clearance hole (211) extends along the width direction of the insulating plate (200).
7. The battery device according to any one of claims 1 to 5, wherein Two pole posts (120) are provided on the first wall (111), and the two pole posts (120) are arranged at intervals along the length direction of the first wall (111). The clearance opening (210) also includes a second clearance hole (212) located between the two pole posts (120).
8. The battery device of claim 7, wherein, The distance between the clearance opening (210) and the pole post (120) is 6mm-22mm.
9. The battery device according to any one of claims 1 to 5, wherein The thickness of the insulating adhesive layer (500) is 0.05mm-0.06mm.
10. The battery device according to any one of claims 1 to 5, wherein The volume resistivity k is 1 x 10 11 (Ω-cm)-1x 10 15 (Ω-cm).
11. A battery pack, characterized by Includes the battery device according to any one of claims 1-10.
12. An electrical device, characterized by It includes an electrical device, and a battery device according to any one of claims 1-10 or a battery pack according to claim 11, wherein the battery device or the battery pack is used to supply power to the electrical device.