Battery pack and electric device with same

Abstract

The utility model provides a kind of battery pack and the electric device with it, wherein, battery pack includes: support plate, support plate is provided with accommodating groove;Battery includes shell and the two pole posts of setting on the installation wall surface of shell, installation wall surface is towards support plate setting;Confluence spare, setting in accommodating groove and with pole post electric connection;Insulating glue, between the two pole posts of battery and be connected between installation wall surface and support plate, in preset direction, insulating glue and pole post between there is first distance L1, between the two pole posts there is second distance L2, first distance L1 and second distance L2 between satisfy: 0.06≤L1 / L2≤0.5, wherein, preset direction is the extension direction of the connecting line between the midpoint of two pole posts.The technical scheme of the application can effectively solve the problem that battery pack is prone to assembly failure in related technology.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and more specifically, to a battery pack and an electrical device having the same. Background Technology

[0002] In related technologies, the side of the battery pack with terminals needs to be equipped with a busbar or other structure, making it difficult to effectively connect the battery side to the battery pack frame and support plate.

[0003] This results in poor connection strength between the battery and the battery pack frame, making the battery pack prone to assembly failure under vibration conditions. Utility Model Content

[0004] The main objective of this invention is to provide a battery pack and an electrical device having the same, in order to solve the problem of assembly failures that easily occur in battery packs in related technologies.

[0005] To achieve the above objectives, according to one aspect of the present invention, a battery pack is provided, comprising: a support plate having a receiving groove; a battery including a housing and two terminals disposed on a mounting wall of the housing, the mounting wall facing the support plate; a busbar disposed in the receiving groove and electrically connected to the terminals; and insulating adhesive disposed between the two terminals of the battery and connected between the mounting wall and the support plate. In a predetermined direction, the insulating adhesive has a first distance L1 mm between itself and the terminals, and a second distance L2 mm between the two terminals. The first distance L1 mm and the second distance L2 mm satisfy the condition: 0.06 ≤ L1 / L2 ≤ 0.5, wherein the predetermined direction is the extension direction of the line connecting the midpoints of the two terminals.

[0006] According to another aspect of the present invention, an electrical device is provided, including a battery pack, wherein the battery pack is the aforementioned battery pack.

[0007] By applying the technical solution of this utility model, the insulating adhesive is placed between the two terminals of the battery, achieving insulation between them. Furthermore, the insulating adhesive connects the battery mounting wall and the support plate, enabling adhesive bonding between them. This fully utilizes the space between the two terminals, thereby improving the connection strength between the battery and the support plate. Moreover, by controlling the ratio of the first distance L1 mm between the insulating adhesive and the terminals to the second distance L2 mm between the two terminals within the aforementioned range, the insulating adhesive has a certain width and is spaced a certain distance from the terminals. This avoids the insulating adhesive flowing between the terminals and the busbars during the forming process, thus maximizing the adhesive strength between the mounting wall and the support plate while preventing it from affecting the current flow between the terminals and the busbars. Therefore, the technical solution of this application effectively solves the problem of assembly failure in battery packs in related technologies. Attached Figure Description

[0008] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0009] Figure 1 A perspective structural schematic diagram of one embodiment of the battery pack according to the present invention is shown;

[0010] Figure 2 It shows Figure 1 A cross-sectional view of the battery pack;

[0011] Figure 3 It shows Figure 1 A magnified view of point A on the battery pack;

[0012] Figure 4 It shows Figure 1 A three-dimensional structural diagram of the battery pack and its connecting components;

[0013] Figure 5 It shows Figure 1 A three-dimensional structural diagram of the battery in the battery pack;

[0014] Figure 6 A cross-sectional schematic diagram of a battery according to an embodiment of the battery pack of the present invention is shown;

[0015] Figure 7 A cross-sectional schematic diagram of one embodiment of the battery pack according to the present invention is shown;

[0016] Figure 8 It shows Figure 7 A magnified view of point B on the battery pack.

[0017] The above figures include the following reference numerals:

[0018] 10. Support plate; 11. Receiving groove;

[0019] 20. Battery; 21. Housing; 211. Mounting wall; 22. Terminal; 23. First explosion-proof valve; 24. Second explosion-proof valve;

[0020] 30. Busbar;

[0021] 40. Insulating adhesive;

[0022] 50. Rubber strip;

[0023] 60. Box body. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0025] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0026] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0027] The following explains the concepts involved in the embodiments of this application: The battery pack includes a battery management system (BMS), a thermal management system, an electrical connection system (high voltage / low voltage connectors, wiring harnesses, etc.), structural components (shell, brackets, etc.), and protective components, etc., which are combined into a battery pack by multiple battery cells in series and / or in parallel, and sealed with a cover plate to form a complete functional unit that can directly output electrical energy.

[0028] The support plate is the main load-bearing component of the battery pack. The support plate can be a base plate, which usually refers to a structural component installed at the bottom of the battery pack to support and fix the battery pack, battery management system, cooling system and other components inside the battery pack.

[0029] A battery can store chemical energy and controllably convert chemical energy into electrical energy. In a recyclable battery, the active materials can be reactivated by charging after discharge so that it can continue to be used. A battery includes a casing and cells disposed within the casing.

[0030] A battery has a casing, which is a component used to provide a space to house the electrodes and other components and isolate them from the outside environment. The casing generally includes a body with an opening at at least one end and a receiving cavity. The opening of the casing can be closed by a cover plate to seal and isolate the internal environment of the battery cell from the external environment.

[0031] The materials of the casing include, but are not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, and aluminum-plastic film.

[0032] A battery has terminals, which are used to electrically connect the electrode assembly located inside the casing to external devices (adjacent batteries or other electrical equipment) located outside the casing. The battery can discharge to external devices through the cell output terminals (tabs) and the external device output terminals (terminals), and an external power source can charge the battery through the terminals and tabs. The terminals can be directly electrically connected to the cell tabs, or they can be electrically connected to the tabs through metal adapters.

[0033] The materials of the poles include, but are not limited to, metals such as copper, aluminum, aluminum alloy, and copper-aluminum alloy.

[0034] The battery also features an explosion-proof valve, which is a component or part that can be activated to release internal pressure or temperature when the internal pressure or temperature of a single battery cell reaches a predetermined threshold. During battery use, the explosion-proof valve is mainly used to prevent excessive pressure buildup that could cause the battery to deform or explode in the event of thermal runaway or other situations. It allows gas to escape from the battery to reduce internal pressure.

[0035] The materials used for explosion-proof valves are not limited, including but not limited to aluminum, steel, and alloys. The shapes of explosion-proof valves are not limited, such as square, oblong, elliptical, racetrack-shaped, etc. The types of explosion-proof valves are not limited, such as scored explosion-proof valves, which can be formed by stamping or laser etching.

[0036] Busbars are used to electrically connect the terminals (current output terminals) of at least two batteries to enable series or parallel connection of multiple battery cells. Busbars are made of metals or alloys such as copper, aluminum, tungsten, and manganese (e.g., copper-aluminum composite materials) and other materials with good electrical conductivity.

[0037] The insulating adhesive and the structural adhesive inside the battery pack have the same composition and molding method. The structural adhesive is used to bond and fix the structural components inside the battery pack. It features high strength, the ability to withstand large loads, aging resistance, fatigue resistance, corrosion resistance, and stable performance throughout its expected lifespan, thus improving the connection strength between the battery and the casing. The structural adhesive is made of an insulating material doped with a conductive medium. The structural adhesive can use insulating materials as the base material, i.e., non-conductive adhesives, such as epoxy resin, silicone rubber, and polyurethane. It can also be epoxy resin structural adhesive or polyurethane structural adhesive. The structural adhesive can be a two-component epoxy resin structural adhesive, a two-component acrylic structural adhesive, a two-component polyurethane structural adhesive, or a two-component silane structural adhesive.

[0038] Battery packs can be used in electrical devices, meaning that electrical devices include battery packs. Electrical devices encompass a wide range of technological fields, including energy storage devices, electric ships, aircraft, laptops, power tools, electric bicycles, electric motorcycles, electric cars, military equipment, and aerospace.

[0039] Battery devices can serve as operating power for electrical devices or as driving power for electrical devices, replacing or partially replacing fuel or natural gas to provide driving power for vehicles.

[0040] The battery device includes multiple battery packs, which can be connected in series, parallel, or a combination thereof. A combination thereof means that multiple battery packs are connected in both series and parallel.

[0041] The battery device is a cluster-level battery structure formed by multiple battery packs connected in series, wherein the number of battery packs in each cluster is strictly configured according to voltage and capacity requirements. Specifically, the battery unit of the battery device includes multiple batteries, some of which are connected in series to form a cluster that meets the preset power supply voltage requirements, and at least one spare battery among the multiple batteries is bypassed.

[0042] The battery device may include: battery cells and a switching control unit.

[0043] like Figures 1 to 3 As shown, this application provides a battery pack. An embodiment of the battery pack includes: a support plate 10, a battery 20, a busbar 30, and insulating adhesive 40. The support plate 10 has a receiving groove 11. The battery 20 includes a housing 21 and two terminals 22 disposed on a mounting wall 211 of the housing 21, with the mounting wall 211 facing the support plate 10. The busbar 30 is disposed within the receiving groove 11 and electrically connected to the terminals 22. The insulating adhesive 40 is disposed between the two terminals 22 of the battery 20 and connects the mounting wall 211 and the support plate 10. In a predetermined direction, the insulating adhesive 40 has a first distance L1 mm between it and the terminals 22, and a second distance L2 mm between the two terminals 22. The first distance L1 mm and the second distance L2 mm satisfy the condition: 0.06 ≤ L1 / L2 ≤ 0.5. The predetermined direction is the extension direction of the line connecting the midpoints of the two terminals 22.

[0044] Applying the technical solution of this embodiment, the insulating adhesive 40 is disposed between the two terminals 22 of the battery 20, which can achieve insulation between the two terminals 22. In addition, the insulating adhesive 40 is connected between the mounting wall 211 of the battery 20 and the support plate 10, which can achieve adhesive connection between the mounting wall 211 and the support plate 10, making full use of the space between the two terminals 22 of the battery 20, thereby improving the connection firmness between the battery 20 and the support plate 10. Furthermore, by controlling the ratio of the first distance L1 mm between the insulating adhesive 40 and the terminals 22 to the second distance L2 mm between the two terminals 22 within the above-mentioned range, the insulating adhesive 40 has a certain width dimension, and at the same time, the insulating adhesive 40 can be spaced a certain distance from the terminals 22. This can maximize the adhesive strength between the mounting wall 211 and the support plate 10 while avoiding the insulating adhesive 40 flowing between the terminals 22 and the busbar 30 during the forming process and affecting the overcurrent between the terminals 22 and the busbar 30. Therefore, the technical solution of this embodiment can effectively solve the problem of battery pack assembly failure in related technologies.

[0045] Preferably, L1 / L2 can be 0.06, 0.08, 0.1, 0.15, 0.2, 0.3, 0.4 or 0.5.

[0046] like Figure 3 As shown, the first distance L1 mm satisfies: 15 ≤ L1 ≤ 50. Controlling the first distance L1 mm within this range prevents the insulating adhesive 40 from flowing between the terminal post 22 and the busbar 30, ensuring the insulating adhesive 40 is closer to the terminal post 22. This results in a larger connection area between the insulating adhesive 40 and the mounting wall surface 211 and the support plate 10, guaranteeing the connection strength between them and thus improving the overall assembly stability of the battery pack. Preferably, L1 can be 15, 18, 20, 25, 35, or 50 mm.

[0047] like Figure 2 As shown, the second distance L2 mm satisfies: 100 ≤ L2 ≤ 250. By controlling the second distance L2 mm within this range, both the insulation effect between the two poles 22 and the connection effect between the mounting wall 211 and the support plate 10 can be considered. Preferably, L2 can be 100, 120, 140, 150, 180, 220 or 250.

[0048] It should be noted that each battery 20 has two terminals 22 on the mounting wall 211 of the casing 21. The first distance L1 mm between the insulating adhesive 40 and the two terminals 22 can be equal or unequal.

[0049] like Figures 1 to 5As shown, the battery 20 also includes a first explosion-proof valve 23 disposed on the mounting wall 211 and located between the two terminals 22. The first explosion-proof valve 23 has a third distance L3 mm between it and the insulating adhesive 40, which satisfies the condition: 10 ≤ L3 ≤ 50. Controlling the third distance L3 mm within the aforementioned range allows the insulating adhesive 40 to be closer to the first explosion-proof valve 23 while avoiding interference from it. This results in a larger connection area between the insulating adhesive 40, the mounting wall 211, and the support plate 10, ensuring the connection strength between them and improving the overall assembly stability of the battery pack. Preferably, L3 can be 10, 15, 18, 20, 25, 40, or 50.

[0050] It should be noted that the electrode post 22 and the insulating adhesive 40 can be irregular structures. The first distance L1 mm and the third distance L3 mm mentioned above refer to the interval between the edges of the corresponding structures projected onto the surface of the support plate 10 facing the battery 20. For example, the first distance L1 mm refers to the interval between the projection of the insulating adhesive 40 onto the surface of the support plate 10 and the projection of the electrode post 22 onto the surface of the support plate 10 in a predetermined direction.

[0051] like Figures 1 to 3 As shown, the battery pack also includes a retaining strip 50 disposed between the insulating adhesive 40 and the terminal post 22. The retaining strip 50 can limit the boundary range of the insulating adhesive 40, so that the insulating adhesive 40 can meet the requirements of the first distance L1 mm and the third distance L3 mm mentioned above.

[0052] Specifically, such as Figure 3 As shown, the height H mm of the adhesive-blocking strip 50 in the extension direction of the pole post 22 satisfies: 3 ≤ H ≤ 15. A height H mm within the above range ensures the adhesive-blocking effect and prevents the insulating adhesive 40 from flowing onto the pole post 22. Preferably, H can be 3, 5, 6, 8, 10, or 15.

[0053] like Figure 3 As shown, the thickness T mm of the adhesive strip 50 in the preset direction satisfies: 3 ≤ T ≤ 10. Within this range, the thickness T mm can be set as narrow as possible while ensuring the adhesive strip 50 is not easily damaged, thus reducing the space occupied between the mounting wall 211 and the support plate 10. This allows the insulating adhesive 40 to have a larger connection area with the mounting wall 211 and the support plate 10, ensuring bonding strength. Preferably, T can be 3, 5, 6, 8, or 10.

[0054] In this embodiment, the busbar 30 is fixedly connected to the support plate 10; the busbar 30 and the terminal post 22 are also fixedly connected. Through the above arrangement, the terminal post 22 is fixedly connected to the support plate 10 via the busbar 30, further increasing the number of connection points between the battery 20 and the support plate 10, and further improving the overall assembly strength of the battery pack.

[0055] Of course, in embodiments not shown in the figure, the busbar and the support plate may not be fixedly connected, or the busbar and the terminal may not be fixedly connected. The busbar is positioned between the terminal and the support plate by pressing, or the electrical connection between the terminal and the busbar is achieved by pressing.

[0056] exist Figure 7 and Figure 8 In the illustrated embodiment, the battery pack further includes an adhesive layer disposed between the support plate 10 and the busbar 30 to secure the busbar 30 to the support plate 10. Secured to the support plate 10 using the adhesive layer offers the advantage of simple operation.

[0057] In one alternative embodiment, the busbar 30 is embedded in the support plate 10. For example, the busbar 30 and the support plate 10 can be integrally injection molded, or a mounting groove can be provided on the support plate 10 and the busbar 30 can be interference-fitted into the mounting groove to ensure that the busbar 30 is securely mounted on the support plate 10.

[0058] In this embodiment, the busbar 30 is welded to the terminal post 22. Welding the busbar 30 and terminal post 22 effectively establishes an electrical connection between them and further enhances the connection strength between the battery 20 and the support plate 10.

[0059] In this embodiment, the support plate 10 is insulated from the busbar 30.

[0060] Specifically, in one feasible embodiment, the support plate 10 is made of an insulating material. Using an insulating material to make the support plate 10 can effectively ensure the insulation between the support plate 10 and the busbar 30.

[0061] In one feasible embodiment, the support plate 10 is made of a conductive material, and an insulating layer is provided between the support plate 10 and the busbar 30. Conductive materials (such as metals) generally have high structural strength. Using a conductive material to make the support plate 10 can ensure the structural strength of the support plate 10, thereby improving the overall assembly strength of the battery pack. By providing an insulating layer between the support plate 10 and the busbar 30, the insulation performance between the two can be effectively guaranteed. The insulating layer can be provided on the support plate 10 or on the busbar 30; the insulating layer can be formed by spraying or coating.

[0062] like Figure 2 and Figure 3 As shown, the terminal post 22 is located within the receiving groove 11, and the mounting wall surface 211 abuts against the surface of the support plate 10. By extending the terminal post 22 into the receiving groove 11, the overall size of the support plate 10, the busbar 30, and the battery 20 is reduced in the direction perpendicular to the surface of the support plate 10, thereby making the overall structure of the battery pack more compact. Furthermore, the abutting fit between the mounting wall surface 211 of the housing 21 and the surface of the support plate 10 improves the assembly strength between the battery 20 and the support plate 10, thus enhancing the overall assembly strength of the battery pack.

[0063] like Figures 1 to 3 As shown, in this embodiment, the mounting wall 211 is the lower wall of the battery 20, and the support plate 10 supports the battery 20 below. The battery pack also includes a housing 60, in which multiple batteries 20 are arranged in an array, and the bottom plate of the housing 60 forms the support plate 10.

[0064] like Figure 6 As shown, the mounting wall 211 is the lower wall of the battery 20, and the support plate 10 supports the battery 20 below it. The battery 20 also includes a second explosion-proof valve 24 disposed on the upper wall of the battery 20. By placing the terminal post 22 and the second explosion-proof valve 24 on two opposing walls of the battery 20, electrothermal separation can be achieved.

[0065] At this point, the insulating adhesive 40 between the two pole posts 22 can be set as a single piece of structure, which can further increase the connection area between the insulating adhesive 40 and the mounting wall 211 and the connection area between the insulating adhesive 40 and the support plate 10, thereby improving the connection strength between the battery 20 and the support plate 10.

[0066] Specifically, the assembly steps of the battery pack in this embodiment are described below:

[0067] Step 1: Place a sealant strip 50 on the mounting wall 211 of the housing 21 and apply insulating adhesive 40 to the inside of the sealant strip 50;

[0068] Step 2: Place the busbar 30 on the support plate 10;

[0069] Step 3: Place the battery 20 on the support plate 10 and align the terminals 22 of the battery 20 with the busbar 30;

[0070] Step 4: Weld the electrode post 22 and the busbar 30 (a perforated structure can be provided on the support plate 10 so that the welding head can be inserted into the perforated structure to achieve the welding connection between the electrode post 22 and the busbar 30).

[0071] It should be noted that the order of steps one and two above can be interchanged; or steps one and two can be performed simultaneously.

[0072] Of course, in embodiments not shown in the figure, the mounting wall can also be one of the circumferential sidewalls of the battery, in which case the support plate is set on the side of the battery.

[0073] This application also provides an electrical device, an embodiment of which includes a battery pack, wherein the battery pack is the aforementioned battery pack. The aforementioned battery pack effectively solves the problem of assembly failures in related technologies, and the electrical device having the aforementioned battery pack also has the aforementioned advantages.

[0074] In the description of this utility model, it should be understood that "multiple" means two or more. Directional terms such as "front, back, up, down, left, right," "horizontal, vertical, perpendicular, horizontal," and "top, bottom" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are used solely for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner or outer contours relative to the outline of each component itself.

[0075] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0076] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0077] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A battery pack, characterized in that, include: A support plate (10) is provided with a receiving groove (11); The battery (20) includes a housing (21) and two terminals (22) disposed on a mounting wall (211) of the housing (21), the mounting wall (211) being disposed toward the support plate (10); A busbar (30) is disposed in the receiving groove (11) and electrically connected to the pole (22); An insulating adhesive (40) is disposed between the two terminals (22) of the battery (20) and connected between the mounting wall (211) and the support plate (10). In a preset direction, the insulating adhesive (40) and the terminals (22) have a first distance L1mm, and the two terminals (22) have a second distance L2mm. The first distance L1mm and the second distance L2mm satisfy the following condition: 0.06≤L1 / L2≤0.

5. The preset direction is the extension direction of the line connecting the midpoints of the two terminals (22).

2. The battery pack according to claim 1, characterized in that, The battery (20) also includes a first explosion-proof valve (23) disposed on the mounting wall (211) and located between the two poles (22), the first explosion-proof valve (23) having a third distance L3mm between it and the insulating adhesive (40), the third distance L3mm satisfying: 10≤L3≤50.

3. The battery pack according to claim 1 or 2, characterized in that, The battery pack also includes a retaining strip (50) disposed between the insulating adhesive (40) and the terminal post (22).

4. The battery pack according to claim 3, characterized in that, The height H mm of the rubber-blocking strip (50) in the extension direction of the pole post (22) satisfies: 3 ≤ H ≤ 15; and / or, The thickness T mm of the rubber-blocking strip (50) in the preset direction satisfies: 3≤T≤10.

5. The battery pack according to claim 1 or 2, characterized in that, The manifold (30) is fixedly connected to the support plate (10); and / or, the manifold (30) is fixedly connected to the pole (22).

6. The battery pack according to claim 1 or 2, characterized in that, The battery pack further includes an adhesive layer disposed between the support plate (10) and the busbar (30) to fix the busbar (30) to the support plate (10); or, The manifold (30) is embedded in the support plate (10).

7. The battery pack according to claim 1 or 2, characterized in that, The manifold (30) is welded to the pole (22).

8. The battery pack according to claim 1 or 2, characterized in that, The support plate (10) is insulated from the busbar (30).

9. The battery pack according to claim 8, characterized in that, The support plate (10) is made of insulating material; or, The support plate (10) is made of conductive material, and an insulating layer is provided between the support plate (10) and the busbar (30).

10. The battery pack according to claim 1 or 2, characterized in that, The pole post (22) is located in the receiving groove (11), and the mounting wall (211) abuts against the surface of the support plate (10).

11. The battery pack according to claim 1, characterized in that, The mounting wall (211) is the lower wall of the battery (20), and the support plate (10) is supported below the battery (20).

12. The battery pack according to claim 11, characterized in that, The battery (20) also includes a second explosion-proof valve (24) disposed on the upper wall of the battery (20).

13. The battery pack according to claim 1 or 2, characterized in that, The first distance L1mm satisfies: 15≤L1≤50.

14. The battery pack according to claim 1 or 2, characterized in that, The second distance L2mm satisfies: 100≤L2≤250.

15. An electrical device comprising a battery pack, characterized in that, The battery pack is the battery pack according to any one of claims 1 to 14.

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