Battery cell and electric device
Patent Information
- Application Number
- CN202522026085.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-19
- Publication Date
- 2026-09-25
- Estimated Expiration
- 2035-09-19
AI Technical Summary
[0004]有鉴于此，本申请的目的在于提供一种电池单体，能够解决电池顶盖悬空导致其受力不均等问题
[0015]从上述技术方案可以看出，本申请提供的单体电池及用电设备的绝缘件的凸部与极耳的根部沿第一方向间隔设置，且凸部与电芯的主体朝向盖板的一端抵接，基于极耳弯折的情况，凸部在盖板和主体之间抵接能够起到支撑盖板的作用，可以避免盖板未连接极耳的一侧处于悬空状态，从而能够避免盖板发生倾斜，防止盖板在电芯压装入壳体的过程中对壳体和电芯造成损伤，保证入壳效率，同时，凸部贯穿设置连通排气结构和壳体与主体的第一间隙的通道，既能够避免由于凸部压实隔膜使得气体流通不便导致电芯出现膨胀或者热失控的情况发生，还能够使得电池在热失控的情况下，气体能够快速流通，提高电池的安全性能。
Smart Images
Figure CN224803904U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery manufacturing technology, specifically to a battery cell and an electrical device incorporating the battery cell. Background Technology
[0002] In the current power battery industry, in order to increase capacity space, a single-core battery has been designed, that is, the number of cores is one. However, after the single-core battery is installed in the casing, only one side has a bent tab, and the other side lacks a tab to pull the top cover, which is in a suspended state. This results in uneven stress on the top cover and frequent damage to the aluminum casing during pre-welding and pressing, which seriously affects the battery installation efficiency and yield.
[0003] Therefore, providing a battery that can solve the problem of uneven force distribution caused by the top cover being suspended is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content
[0004] In view of this, the purpose of this application is to provide a battery cell that can solve the problem of uneven stress caused by the battery top cover being suspended. In addition, this application also provides an electrical device including the aforementioned battery cell.
[0005] A single battery cell, comprising: A housing having a receiving cavity, and the housing having an opening communicating with the receiving cavity on at least one side along a third direction; Cover plate, to close the opening; A battery cell is placed in the receiving cavity. The battery cell has a body and a tab. The tab has a root and the root is connected to the end of the body facing the cover plate. An insulating member is disposed on the side of the cover plate facing the main body. The insulating member has an exhaust structure and a protrusion spaced apart along a second direction. The protrusion abuts against the end of the main body facing the cover plate. The protrusion and the root of the electrode are spaced apart along a first direction, where the first direction is the width direction of the housing, the second direction is the length direction of the housing, and the third direction is the height direction of the housing. The protrusion has a through channel, and there is a first gap between the housing and the main body; the channel connects the exhaust structure and the first gap.
[0006] Optionally, in the above-mentioned battery cell, the channel includes a first outlet and a first inlet. Along the second direction, the first outlet is formed on the side of the protrusion closest to the exhaust structure, and the first inlet is formed on the side of the protrusion furthest from the exhaust structure.
[0007] Optionally, in the aforementioned battery cell, the channel further includes a groove, and along the third direction, the side of the protrusion facing away from the main body is recessed to form the groove; the groove connects the first outlet and the first inlet.
[0008] Optionally, in the above-mentioned battery cell, the channel further includes a third inlet, and a third inlet is formed on the side of the protrusion away from the root of the tab along the first direction, and the third inlet communicates with the groove; And / or, The channel also includes a second inlet. Along the first direction, a second inlet is formed on the side of the protrusion near the root of the tab. The second inlet communicates with the groove.
[0009] Optionally, in the above-mentioned battery cell, at least one through hole is provided through the bottom of the groove, and the ratio of the area of all the through holes to the area of the bottom of the groove is 0.25 to 0.75.
[0010] Optionally, in the above-mentioned battery cell, the area of all the first inlets is s1, and the area of all the first outlets is s2; along the second direction, the area of the side surface of the protrusion closest to the exhaust structure is S1, and the area of the side surface of the protrusion furthest from the exhaust structure is S2. The ratio of s1 to S1 ranges from 1 / 5 to 2 / 3; the ratio of s2 to S2 ranges from 1 / 5 to 2 / 3.
[0011] Optionally, in the above-mentioned battery cell, the insulating element includes: The first insulating part is connected to the cover plate; The second insulating part is located on the side of the first insulating part facing the main body, and one end of the second insulating part along the second direction is rotatably connected to the first insulating part; The electrode tab includes a bent portion and a first connecting portion, the first connecting portion being located between the second insulating portion and the first insulating portion, and the first connecting portion and the root portion being connected through the bent portion; the second insulating portion is provided with the protrusion.
[0012] Optionally, in the above-mentioned battery cell, the cover plate is provided with a terminal post; the first connecting part of the electrode tab is connected to the terminal post, and along the third direction, the end of the protrusion away from the main body abuts against the terminal post or the first insulating part; or, The first connecting portion of the electrode tab is connected to the electrode post via an adapter. Along the third direction, the end of the protrusion away from the main body abuts against the adapter or the first insulating portion.
[0013] Optionally, in the above-mentioned battery cell, the first insulating portion and the second insulating portion form a second connecting portion at the connection position; Along the first direction, the size of the second connecting portion is smaller than the size of the first insulating portion to form a notch; On a projection plane perpendicular to the second direction, the orthographic projection of the notch at least partially overlaps with the orthographic projection of the first inlet.
[0014] An electrical device includes the aforementioned battery cell.
[0015] As can be seen from the above technical solution, the protrusion of the insulating component of the single cell and the electrical device provided in this application is spaced apart from the root of the tab along the first direction, and the protrusion abuts against the end of the cell body facing the cover plate. Based on the bending of the tab, the protrusion abuts between the cover plate and the body, which can play a supporting role for the cover plate. This can prevent the side of the cover plate not connected to the tab from being suspended, thereby preventing the cover plate from tilting and preventing the cover plate from damaging the shell and the cell during the cell pressing process, ensuring the efficiency of the cell insertion. At the same time, the protrusion is provided with a channel that connects the venting structure and the first gap between the shell and the body. This can not only prevent the cell from expanding or thermally running away due to the protrusion pressing the diaphragm and making gas flow inconvenient, but also allow the gas to flow quickly in the event of thermal runaway, improving the safety performance of the battery. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of the structure of a battery cell provided in an embodiment of the present invention.
[0018] Figure 2 A front view of the cover plate and insulating component provided in an embodiment of this utility model.
[0019] Figure 3 A bottom view of the cover plate and insulating component provided in an embodiment of this utility model.
[0020] Figure 4 A schematic diagram of the cover plate and insulating component provided in an embodiment of this utility model.
[0021] Figure 5 A partial structural diagram of a battery cell with the cover plate not inserted into the casing is provided for an embodiment of this utility model.
[0022] Figure 6 This is a schematic diagram of the structure of the second insulating part provided in an embodiment of the present invention.
[0023] Figure 7 A cross-sectional view of the groove provided in an embodiment of this utility model.
[0024] in: 1. Cover plate; 2. Battery cell; 21. Main body; 22. Electrode tab; 3. Insulating component; 31. Exhaust structure; 32. Protrusion; 321. First sidewall; 322. Second sidewall; 33. Groove; 34. Groove bottom; 341. Through hole; 35. First insulating part; 36. Second insulating part; 37. Second connecting part; 38. Notch; 41. First export; 42. First import; 43. Second import; 44. Third import; 5. Pole column. Detailed Implementation
[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0026] In the description of this application, it should be noted that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. These terms are used only for the convenience of describing this application and for simplifying the description, and 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. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0027] like Figures 1 to 7 As shown in the figure, this application provides a single battery cell that can solve problems such as uneven force distribution caused by the battery top cover being suspended.
[0028] First, the battery cell includes a casing, a cover plate 1, a battery cell 2, and an insulating component 3. The casing has a receiving cavity, and at least one side of the casing along a third direction has an opening communicating with the receiving cavity. The cover plate 1 closes the opening. The battery cell 2 is placed in the receiving cavity. The battery cell 2 has a body 21 and a tab 22. The tab 22 has a root, which is connected to the end of the body 21 facing the cover plate 1. The insulating component 3 is located on the side of the cover plate 1 facing the body 21. The insulating component 3 has an exhaust structure 31 and a protrusion 32 spaced apart along a second direction. The protrusion 32 abuts against the end of the body 21 facing the cover plate 1. The protrusion 32 and the root of the tab 22 are spaced apart along a first direction. The protrusion 32 abuts between the cover plate 1 and the body 21 and can support the cover plate 1. This solves the problem that after the battery cell 2 enters the casing, one side bends the tab 22, while the other side lacks the tab 22 and pulls the cover plate 1, resulting in a suspended state. This causes uneven stress on the cover plate 1 and frequent damage to the casing during pre-welding and pressing. The first direction is the width direction of the shell; the second direction is the length direction of the shell; the third direction is the height direction of the shell; for detailed illustrations of the first, second, and third directions, please refer to... Figure 1 , Figure 2 and Figure 3 .
[0029] Because the protrusion 32 abuts against the body, it tightly presses against the diaphragm inside the body, hindering gas flow and significantly affecting the safety performance of the battery cell 2. The battery cell may experience expansion or thermal runaway. Simultaneously, the cover plate 1 and the shell are welded together to form a welded position. The protrusion 32 is located between the explosion-proof valve of the cover plate 1 and the welded position, further impeding gas flow and heat dissipation. The protrusion 32 is perforated with a channel, and there is a first gap between the shell and the main body 21. This channel connects the exhaust structure 31 and the first gap (i.e., the protrusion 32 perforates to connect the exhaust structure 31 and the first gap between the shell and the main body 21), solving the problem of inconvenient gas flow and heat dissipation. In the event of thermal runaway, gas can flow rapidly, ensuring smooth flow to the explosion-proof valve. Furthermore, the number of protrusions 32 can be one, two, or more. When there are two or more protrusions 32, they are evenly distributed along the second direction.
[0030] As can be seen, in this embodiment, the protrusion 32 of the insulating member 3 and the root of the tab 22 are spaced apart along the first direction, and the protrusion 32 abuts against the end of the main body 21 of the cell 2 facing the cover plate 1. Based on the bending of the tab 22, the protrusion 32 abuts between the cover plate 1 and the main body 21, which can play the role of supporting the cover plate 1. This can prevent the side of the cover plate 1 not connected to the tab 22 from being suspended, thereby preventing the cover plate 1 from tilting and preventing the cover plate 1 from damaging the housing and the cell 2 during the process of pressing the cell 2 into the housing, ensuring the efficiency of housing insertion. At the same time, the protrusion 32 is provided with a channel that connects the exhaust structure 31 and the first gap between the housing and the main body 21. This can not only prevent the cell 2 from expanding or thermally running away due to the gas flow being hindered by the protrusion 32 pressing the diaphragm, but also allow the gas to flow quickly in the event of thermal runaway, improving the safety performance of the battery.
[0031] In specific implementation, the channel includes a first outlet 41 and a first inlet 42. Along the second direction, the first outlet 41 is formed on the side of the protrusion 32 closest to the exhaust structure 31, and the first inlet 42 is formed on the side of the protrusion 32 furthest from the exhaust structure 31. The exhaust structure 31 is closer to the explosion-proof valve than the protrusion 32, minimizing the path of the gas generated by the battery cell 2 to the explosion-proof valve, facilitating gas discharge from the explosion-proof valve. The first outlet 41 and the first inlet 42 of the channel are not limited to being located on the side of the protrusion 32 along the second direction; they can also be located on the side along the first direction, or on the side of the protrusion 32 along different directions. Based on the structure of the battery cell, the side of the battery cell along the first direction consists of two large surfaces. The expansion of the battery cell 2 on these large surfaces results in greater deformation, which may reduce the first gap between the large surface of the battery cell 2 and its adjacent casing, or even eliminate the first gap altogether. In contrast, the two sides of the battery cell 2 along the second direction have smaller deformation when the battery cell 2 expands, ensuring that the first gap is not destroyed and that gas can always flow from the first gap into the channel of the protrusion 32, thus guaranteeing the effectiveness of gas flow. In addition, the fact that the first inlet 42 and the second inlet 43 of the passage are located on two sides in the same direction ensures smooth ventilation.
[0032] In specific implementation, the channel also includes a groove 33. Along a third direction, the side of the protrusion 32 facing away from the main body 21 is recessed to form a groove 33; the groove 33 connects the first outlet 41 and the first inlet 42. The groove 33 is set to meet the support effect of the protrusion 32, and the groove 33 can reduce the weight of the protrusion 32.
[0033] In specific implementation, the channel also includes a third inlet 44. Along the first direction, a third inlet 44 is formed on the side of the protrusion 32 away from the root of the tab 22. The third inlet 44 is connected to the groove 33. This can increase the flow area of the channel and enable the gas to flow quickly.
[0034] In specific implementation, the channel also includes a second inlet 43. Along the first direction, the second inlet 43 is formed on the side of the protrusion 32 near the root of the tab 22, and the second inlet 43 communicates with the groove 33. It should be noted that either the third inlet 44 or the second inlet 43 can be provided, or both can be provided. This increases the flow area of the channel, allowing for rapid gas flow.
[0035] In specific implementation, such as Figure 1 As shown, the protrusion 32 abuts against the body. When the protrusion 32 is provided with a groove 33, the bottom of the groove 33 abuts against the body, making it difficult for gas to escape from the bottom of the groove. At least one through hole 341 is provided through the bottom of the groove 33, which can solve the problem of gas not being able to escape from the bottom of the groove. For ease of processing, there can be one through hole 341, but it is not limited to this. There can also be two or more through holes 341. The ratio of the area of all through holes 341 to the area of the bottom of the groove is 0.25 to 0.75. Specifically, the ratio of the area of all through holes 341 to the area of the bottom of the groove can be any one of 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, and 0.75. This ratio limitation can not only avoid the situation where the ventilation area is insufficient due to being too small, but also avoid the situation where the structural strength of the protrusion 32 is insufficient due to being too large.
[0036] In specific implementation, the area of all first inlets 42 is s1, and the area of all first outlets 41 is s2; along the second direction, the area of the surface of the protrusion 32 closest to the exhaust structure 31 is S1, and the area of the surface of the protrusion 32 furthest from the exhaust structure 31 is S2; it should be noted that there can be one, two, or more first inlets 42 and first outlets 41. The ratio of s1 to S1 ranges from 1 / 5 to 2 / 3; the ratio of s2 to S2 ranges from 1 / 5 to 2 / 3. The ratio of s1 to S1 can be any one of 0.2, 0.3, 0.4, 0.5, 0.6, or 2 / 3; the ratio of s2 to S2 can be any one of 0.2, 0.3, 0.4, 0.5, 0.6, or 2 / 3. Limiting the ratio not only prevents insufficient ventilation area due to a small ratio, but also prevents insufficient structural strength of the protrusion 32 due to a large ratio.
[0037] In some embodiments, the sidewall of the groove 33 includes a first sidewall 321 and two second sidewalls 322; the first sidewall 321 extends along a second direction; the second sidewalls 322 are located at both ends of the first sidewall 321 along the second direction. Figure 5As shown, the groove bottom 34 and the two second sidewalls 322 of the groove 33 form an opening on the side away from the root of the tab 22 along the first direction, which is the third inlet 44 of the channel; and / or, the groove bottom 34 and the two second sidewalls 322 of the groove 33 form an opening on the side near the root of the tab 22 along the first direction, which is the second inlet 43 of the channel. It is understandable that, along the first direction, the side wall of the groove 33 facing away from the root of the tab 22 forms an opening, while the side facing away from the root of the tab 22 has neither an opening nor a second inlet 43, or neither an opening nor a second inlet 43; or, along the first direction, the side wall of the groove 33 facing away from the root of the tab 22 forms an opening, while the side facing away from the root of the tab 22 has neither an opening nor a third inlet 44, or neither an opening nor a third inlet 44; or, along the first direction, both the side wall of the groove 33 facing away from the tab 22 and the side facing away from the tab 22 are open. The second inlet 43 and / or the third inlet 44 being open facilitates gas entry into the groove 33 of the protrusion 32 and flow from the first outlet 41 of the protrusion 32 to the explosion-proof valve.
[0038] For specific implementation details, please refer to [link / reference]. Figure 2 and Figure 4 The insulating component 3 includes a first insulating part 35 and a second insulating part 36, wherein the first insulating part 35 is connected to the cover plate 1; the second insulating part 36 is located on the side of the first insulating part 35 facing the main body 21, and one end of the second insulating part 36 along the second direction is rotatably connected to the first insulating part 35.
[0039] The tab 22 includes a bent portion and a first connecting portion. The first connecting portion is located between the second insulating portion 36 and the first insulating portion 35, and the first connecting portion and the root portion are connected by the bent portion. The second insulating portion 36 is provided with a protrusion 32, and the first insulating portion 35 is provided with an exhaust structure 31.
[0040] In specific implementation, the cover plate 1 is provided with a pole post 5; the first connecting part of the pole lug 22 is connected to the pole post 5, and along a third direction, the end of the protrusion 32 located away from the main body 21 abuts against the pole post 5 or the first insulating part 35; the two abut against each other to support each other and prevent them from collapsing. Alternatively, the first connecting part of the pole lug 22 is connected to the pole post 5 through an adapter, and along a third direction, the end of the protrusion 32 located away from the main body 21 abuts against the adapter or the first insulating part 35; the two abut against each other to support each other and prevent them from collapsing.
[0041] In specific implementation, such as Figure 6As shown, the second insulating portion 36 includes a substrate and a protrusion 32. The protrusion 32 is connected to the substrate. The substrate has a first surface facing the cover plate 1 and a second surface facing away from the first surface along its thickness direction. A portion of the protrusion 32 protrudes from the first surface of the substrate, and another portion of the protrusion 32 protrudes from the second surface of the substrate. The portion of the protrusion 32 protruding from the first surface of the substrate can abut against the side of the first insulating portion 35 near the cell 2, which can play a supporting role and ensure the contact relationship between the protrusion 32 and the cell 2 body.
[0042] In specific implementation, such as Figure 3 , Figure 4 and Figure 5 As shown, the first insulating portion 35 and the second insulating portion 36 form a second connecting portion 37 at the connection position; along the first direction, the size of the second connecting portion 37 is smaller than the size of the first insulating portion 35 to form a notch 38; on the projection plane perpendicular to the second direction, the orthographic projection of the notch 38 at least partially overlaps with the orthographic projection of the first inlet 42. It can be understood that the first inlet 42 is provided on the part of the protrusion 32 protruding from the first surface of the substrate. The orthographic projection of the first inlet 42 at least partially overlaps with the orthographic projection of the notch 38, which can avoid the situation where the part of the protrusion 32 protruding from the first surface of the substrate does not have the first inlet 42, thus blocking the gas flow. Moreover, the overlap between the orthographic projections of the first inlet 42 and the notch 38 enables the gas to flow quickly.
[0043] In a specific implementation, the orthographic projection of the first outlet 41 and the orthographic projection of the notch 38 at least partially overlap, but are not limited to this. The positional relationship between the first outlet 41 and the first inlet 42 of the portion of the protrusion 32 that protrudes from the first surface of the substrate can be specifically designed by those skilled in the art according to the specific circumstances.
[0044] When the electrolyte in a battery cell is injected, it is not quickly absorbed by the cell body 2. A portion of the electrolyte remains between the separator and the cover plate 1 of the battery body. A first insulating part 35 and a second insulating part 36 are provided between the separator and the cover plate 1. Some electrolyte remains on the side of the second insulating part 36 facing away from the body. In subsequent processes, the electrolyte will be slowly absorbed by the body, but some electrolyte will remain on the side of the second insulating part 36 facing away from the body. Without violent shaking or vibration, this portion of electrolyte will remain. The inlet, outlet, and opening in the groove 33 on the protrusion 32 of the second insulating part 36 34 allow the electrolyte to flow into the receiving cavity, preventing electrolyte retention.
[0045] In specific implementation, the bottom surface of the groove 33 is inclined, and along the third direction, the lowest point of the bottom surface elevation is positioned towards the opening of the side wall of the groove 33, facilitating the complete outflow of electrolyte from the bottom surface. The angle between the inclined direction of the bottom surface and the virtual horizontal plane ranges from 2° to 20°, and the virtual horizontal plane is perpendicular to the third direction. The angle between the inclined direction of the bottom surface and the virtual horizontal plane can be any of 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, 10°, 11°, 12°, 13°, 14°, 15°, 16°, 17°, 18°, 19°, or 20°. This angle limitation not only prevents the angle from being too small, thus ensuring complete electrolyte drainage, but also prevents the angle from being too large, resulting in an excessively large dimension of the bottom of the groove 33 along the third direction, thereby affecting the capacity of the groove 33.
[0046] like Figure 7 As shown, the inclined bottom surface of the trough can form a single-slope structure; the inclined first bottom surface of the trough can also form a double-slope structure. However, it is not limited to this. The bottom surface of the trough can also be inclined towards the through hole 341 of the bottom surface from various positions. That is, when the through hole 341 is located in the middle of the bottom surface along the horizontal plane, the bottom surface of the trough is a conical surface.
[0047] This application also provides an electrical device including the aforementioned battery cell.
[0048] As can be seen, in the electrical equipment provided in this application embodiment, the protrusion 32 of the insulating component 3 and the root of the tab 22 are spaced apart along the first direction, and the protrusion 32 abuts against the end of the main body 21 of the cell 2 facing the cover plate 1. Based on the bending of the tab 22, the protrusion 32 abuts between the cover plate 1 and the main body 21, which can play the role of supporting the cover plate 1. This can prevent the side of the cover plate 1 not connected to the tab 22 from being suspended, thereby preventing the cover plate 1 from tilting and preventing the cover plate 1 from damaging the shell and the cell 2 during the process of pressing the cell 2 into the shell, ensuring the efficiency of the casing. At the same time, the protrusion 32 is provided with a channel that connects the exhaust structure 31 and the first gap between the shell and the main body 21. This can not only prevent the cell 2 from expanding or thermally running away due to the gas flow being hindered by the protrusion 32 pressing the diaphragm, but also allow the gas to flow quickly in the event of thermal runaway, improving the safety performance of the battery.
[0049] There are no particular limitations on the electrical equipment used in this application, which may include, but are not limited to: laptops, pen input computers, mobile computers, e-book players, portable telephones, portable fax machines, portable copiers, portable printers, stereo headphones, video recorders, LCD TVs, portable cleaners, portable CD players, mini CDs, transceivers, electronic notebooks, calculators, memory cards, portable recorders, radios, backup power supplies, motors, automobiles, motorcycles, electric bicycles, bicycles, lighting fixtures, toys, game consoles, clocks, power tools, flashlights, cameras, large household batteries, and lithium-ion capacitors, etc.
[0050] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0051] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.
[0052] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A battery cell, characterized in that, include: A housing having a receiving cavity, and the housing having an opening communicating with the receiving cavity on at least one side along a third direction; Cover plate (1) to close the opening; A battery cell (2) is placed in the receiving cavity. The battery cell (2) has a body (21) and a tab (22). The tab (22) has a root and the root is connected to one end of the body (21) facing the cover plate (1). An insulating member (3) is disposed on the side of the cover plate (1) facing the main body (21). The insulating member (3) has an exhaust structure (31) and a protrusion (32) spaced apart along a second direction. The protrusion (32) abuts against one end of the main body (21) facing the cover plate (1). The protrusion (32) and the root of the tab (22) are spaced apart along a first direction, which is the width direction of the housing. The second direction is the length direction of the housing. The third direction is the height direction of the housing. The protrusion (32) is provided with a channel, and there is a first gap between the housing and the main body (21); the channel connects the exhaust structure (31) and the first gap.
2. The battery cell according to claim 1, characterized in that, The channel includes a first outlet (41) and a first inlet (42). Along the second direction, the first outlet (41) is formed on the side of the protrusion (32) near the exhaust structure (31), and the first inlet (42) is formed on the side of the protrusion (32) away from the exhaust structure (31).
3. The battery cell according to claim 2, characterized in that, The channel also includes a groove (33), and along the third direction, the protrusion (32) is recessed on the side opposite to the body (21) to form the groove (33); the groove (33) connects the first outlet (41) and the first inlet (42).
4. The battery cell according to claim 3, characterized in that, The channel also includes a third inlet (44), which is formed on the side of the protrusion (32) away from the root of the tab (22) along the first direction. The third inlet (44) is connected to the groove (33). And / or, The channel also includes a second inlet (43), which is formed on the side of the protrusion (32) near the root of the tab (22) along the first direction. The second inlet (43) is connected to the groove (33).
5. The battery cell according to claim 4, characterized in that, The groove (33) has at least one through hole (341) through its bottom (34), and the ratio of the area of all the through holes (341) to the area of the bottom (34) is 0.25 to 0.
75.
6. The battery cell according to claim 2, characterized in that, The area of all the first inlets (42) is s1, and the area of all the first outlets (41) is s2; along the second direction, the area of the side surface of the protrusion (32) near the exhaust structure (31) is S1, and the area of the side surface of the protrusion (32) away from the exhaust structure (31) is S2. The ratio of s1 to S1 ranges from 1 / 5 to 2 / 3; the ratio of s2 to S2 ranges from 1 / 5 to 2 / 3.
7. The battery cell according to any one of claims 2-6, characterized in that, The insulating element (3) includes: The first insulating part (35) is connected to the cover plate (1); The second insulating part (36) is located on the side of the first insulating part (35) facing the main body (21), and one end of the second insulating part (36) along the second direction is rotatably connected to the first insulating part (35); The tab (22) includes a bent portion and a first connecting portion. The first connecting portion is located between the second insulating portion (36) and the first insulating portion (35), and the first connecting portion and the root portion are connected through the bent portion. The second insulating portion (36) is provided with the protrusion (32).
8. The battery cell according to claim 7, characterized in that, The cover plate (1) is provided with a pole post (5); the first connecting part of the pole lug (22) is connected to the pole post (5), and along the third direction, the end of the protrusion (32) away from the main body (21) abuts against the pole post (5) or the first insulating part (35); or, The first connecting part of the tab (22) is connected to the pole post (5) through an adapter. Along the third direction, the end of the protrusion (32) that is away from the main body (21) abuts against the adapter or the first insulating part (35).
9. The battery cell according to claim 7, characterized in that, The first insulating part (35) and the second insulating part (36) form a second connecting part (37) at the connecting position; Along the first direction, the size of the second connecting portion (37) is smaller than the size of the first insulating portion (35) to form a notch (38); On a projection plane perpendicular to the second direction, the orthographic projection of the notch (38) at least partially overlaps with the orthographic projection of the first inlet (42).
10. An electrical appliance, characterized in that, Includes the battery cell as described in any one of claims 1 to 9.