Battery cell and battery pack
By setting up an exhaust passage between the pole group and the side plate of the battery cell, the problem of gas inside the pole group cannot be discharged in time is solved, the risk of thermal runaway is reduced, and the safety of the battery cell is improved.
Patent Information
- Application Number
- CN202420356394.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-26
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-02-26
AI Technical Summary
In the prior art, some gas inside the pole group cannot be discharged in time, which increases the risk of thermal runaway from the battery cell.
An exhaust passage member is provided between the pole group and the side plate of the battery cell, and an exhaust passage is defined between the exhaust passage member and the side plate. The gas inside the pole group can flow smoothly to the pressure relief through the exhaust passage. at the relevant position of the valve.
Through the design of the exhaust passage, the gas inside the pole group can be discharged in time, reducing the risk of thermal runaway and improving the safety of the battery cell.
Smart Images
Figure CN222530728U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of batteries, in particular to a battery monomer and a battery pack. Background Art
[0002] In the related art, when the internal air pressure of a battery cell is relatively high, the pressure relief valve on the battery housing can automatically open and discharge the gas inside the electrode group of the battery cell to reduce the internal air pressure of the battery cell, thereby ensuring the safety of the battery cell.
[0003] However, in the related art, some gas inside the electrode group cannot flow smoothly to the relevant position of the pressure relief valve, resulting in that some gas inside the electrode group cannot be discharged in time, which easily increases the risk of thermal runaway of the battery cell. Therefore, there is room for improvement. Utility Model Content
[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a battery cell, wherein an exhaust channel member is provided between the electrode group and the side plate of the battery cell, and an exhaust channel is defined between the exhaust channel member and the side plate, and the gas inside the electrode group can flow relatively smoothly to the relevant position of the pressure relief valve through the exhaust channel, which can reduce or avoid the situation where the gas inside the electrode group cannot be discharged in time, thereby improving the safety of the battery cell.
[0005] The utility model also provides a battery pack having the battery monomer.
[0006] The battery cell according to the first embodiment of the utility model includes: a battery housing, including two cover plates arranged along a first direction and two side plates arranged along a second direction, the second direction being perpendicular to the first direction, the cover plates being provided with poles, and at least one of the side plates being provided with a pressure relief valve; a pole group, arranged in the battery housing, the poles being electrically connected to the pole group; an exhaust channel member, the exhaust channel member being arranged in the battery housing and between the pole group and the side plates, an exhaust channel being defined between the exhaust channel member and the side plates, and an exhaust structure being formed on the exhaust channel member.
[0007] According to the battery cell of the embodiment of the utility model, an exhaust channel member is provided between the electrode group and the side plate of the battery cell, and an exhaust channel is defined between the exhaust channel member and the side plate. The gas inside the electrode group can flow relatively smoothly to the relevant position of the pressure relief valve through the exhaust channel, which can reduce or avoid the situation where the gas inside the electrode group cannot be discharged in time, thereby improving the safety of the battery cell.
[0008] According to some embodiments of the present utility model, the exhaust channel member includes an exhaust plate and a supporting rib arranged on the exhaust plate, the supporting rib is located on a side of the exhaust plate facing the side plate, and the exhaust structure is formed on the exhaust plate.
[0009] According to some embodiments of the present invention, the exhaust structure includes a main exhaust hole and an auxiliary exhaust hole, the main exhaust hole is opposite to the pressure relief valve, and the auxiliary exhaust holes are distributed on opposite sides of the main exhaust hole along the first direction.
[0010] According to some embodiments of the utility model, the plurality of auxiliary exhaust holes located on the same side of the main exhaust hole along the first direction are arranged along the first direction and the third direction, the first direction, the second direction and the third direction are perpendicular to each other, and the main exhaust hole and the auxiliary exhaust hole both extend along the first direction; and / or, the supporting ribs are distributed on two opposite sides of the main exhaust hole along the third direction and on two opposite sides of the auxiliary exhaust hole along the third direction, and the supporting ribs extend along the first direction.
[0011] According to some embodiments of the present invention, the thickness of the exhaust plate is in the range of 0.5 mm to 2.5 mm; and / or the protrusion height of the supporting rib is in the range of 0.5 mm to 2.5 mm.
[0012] According to some embodiments of the present invention, the exhaust channel component is a plastic component; and / or the exhaust channel component is an integrally formed component.
[0013] According to some embodiments of the present invention, the exhaust channel member is fixed to the pole group.
[0014] According to some embodiments of the utility model, the outer surface of the pole group is covered with an insulating film, and the exhaust channel component is hot-melt connected to the insulating film; or, a first positioning hole is formed on the exhaust channel component, the outer surface of the pole group is covered with an insulating film, and a second positioning hole is formed on the part of the insulating film facing the exhaust channel component, and the second positioning hole is arranged opposite to the first positioning hole in the second direction.
[0015] According to some embodiments of the utility model, the size range of the battery shell in the first direction is 300mm-1000mm, the size range of the battery shell in the second direction is 50mm-150mm, the size range of the battery shell in the third direction is 12mm-30mm, and the first direction, the second direction and the third direction are perpendicular to each other.
[0016] A battery pack according to an embodiment of the second aspect of the utility model includes: a battery cell according to an embodiment of the first aspect of the utility model.
[0017] According to the battery pack of the embodiment of the utility model, by setting the above-mentioned battery cell, an exhaust channel member is provided between the electrode group and the side plate of the battery cell, and an exhaust channel is defined between the exhaust channel member and the side plate. The gas inside the electrode group can flow relatively smoothly to the relevant position of the pressure relief valve through the exhaust channel, which can reduce or avoid the situation where the gas inside the electrode group cannot be discharged in time, thereby improving the safety of the battery cell and further improving the safety of the battery pack.
[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:
[0020] Figure 1 is a schematic diagram of a battery cell according to some embodiments of the present utility model;
[0021] Figure 2 yes Figure 1 An exploded view of a battery cell in Figure 1;
[0022] Figure 3 yes Figure 2 A schematic diagram of an exhaust channel member of a battery cell;
[0023] Figure 4 yes Figure 3 A front view of the exhaust passage member;
[0024] Figure 5 yes Figure 4 Section view along line AA;
[0025] Figure 6 yes Figure 3 Schematic diagram of the exhaust channel component from another angle.
[0026] Reference numerals:
[0027] 100. Battery cell;
[0028] 10. Battery housing; 11. Cover plate; 12. Side plate; 13. Terminal column; 14. Pressure relief valve;
[0029] 20, pole group; 21, insulating film; 22, end face; 23, side face;
[0030] 30. Exhaust channel member; 32. Exhaust structure; 321. Main exhaust hole; 322. Auxiliary exhaust hole; 33. Exhaust plate; 34. Support rib; 35. First positioning hole. DETAILED DESCRIPTION
[0031] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.
[0032] A battery cell 100 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.
[0033] Reference Figure 1-Figure 2 According to the battery cell 100 of the first embodiment of the utility model, the battery cell 100 includes a battery housing 10, an electrode group 20 and an exhaust channel. The battery housing 10 includes two cover plates 11 arranged along a first direction (refer to the e1 direction of the accompanying drawings) and two side plates 12 arranged along a second direction (refer to the e2 direction of the accompanying drawings), the second direction is perpendicular to the first direction, the cover plate 11 is provided with a pole 13, at least one side plate 12 is provided with a pressure relief valve 14, which can be provided on one of the side plates 12 of the battery housing 10, or both side plates 12 are provided with a pressure relief valve 14, the electrode group 20 is arranged in the battery housing 10, and the pole 13 is electrically connected to the electrode group 20. By providing the pressure relief valve 14 on at least one side plate 12, when the pressure inside the electrode group 20 is relatively high, the pressure relief valve 14 can release the abnormal pressure inside the electrode group 20, so as to ensure that the battery cell 100 can operate safely and stably, and avoid the occurrence of situations such as the explosion of the battery cell 100 caused by excessive pressure inside the electrode group 20. In addition, by arranging the pole 13 on the cover plate 11 and arranging the pressure relief valve 14 on the side plate 12 , the side plate 12 can provide sufficient installation space for the pressure relief valve 14 , so as to facilitate the installation of the pressure relief valve 14 .
[0034] The exhaust channel member 30 is disposed in the battery housing 10 and between the electrode group 20 and the side plate 12. An exhaust channel is defined between the exhaust channel member 30 and the side plate 12, and an exhaust structure 32 is formed on the exhaust channel member 30. The exhaust channel member 30 is disposed between the electrode group 20 and the side plate 12 provided with the pressure relief valve 14. For example, when a pressure relief valve 14 is provided on one of the side plates 12 of the battery housing 10, an exhaust channel member 30 is provided between the side plate 12 and the electrode group 20, and an exhaust channel member 30 is not required to be provided between the other side plate 12 and the electrode group 20; when both side plates 12 of the battery housing 10 are provided with the pressure relief valve 14, an exhaust channel member 30 can be provided between both side plates 12 and the electrode group 20.
[0035] By arranging the exhaust channel member 30 in the battery housing 10 and between the electrode group 20 and the side plate 12, the gas inside the electrode group 20 can flow smoothly to the relevant position of the pressure relief valve 14 through the exhaust channel, which can reduce or avoid the situation where the gas inside the electrode group 20 cannot be discharged in time, thereby improving the safety of the battery cell 100. In addition, by arranging the exhaust channel member 30 between the side plate 12 of the battery housing 10 and the electrode group 20, the overall structural strength of the battery cell 100 can be improved, and the vibration resistance performance of the battery cell 100 can be improved.
[0036] According to the battery cell 100 of the embodiment of the utility model, an exhaust channel member 30 is provided between the pole group 20 and the side plate 12 of the battery cell 100, and an exhaust channel is defined between the exhaust channel member 30 and the side plate 12. The gas inside the pole group 20 can flow relatively smoothly to the relevant position of the pressure relief valve 14 through the exhaust channel, which can reduce or avoid the situation where the gas inside the pole group 20 cannot be discharged in time, thereby improving the safety of the battery cell 100.
[0037] Reference Figure 3-Figure 6 According to some embodiments of the present invention, the exhaust channel member 30 includes an exhaust plate 33 and a supporting rib 34 provided on the exhaust plate 33, the supporting rib 34 is located on the side of the exhaust plate 33 facing the side plate 12, and an exhaust structure 32 is formed on the exhaust plate 33. By providing the supporting rib 34 on the exhaust plate 33, and the supporting rib 34 is located on the side of the exhaust plate 33 facing the side plate 12, it is possible to have enough space between the exhaust plate 33 and the side plate 12, so that an exhaust channel is defined between the exhaust plate 33 and the side plate 12, and at the same time, by providing the supporting rib 34, the overall structural strength of the exhaust channel member 30 can be improved. The exhaust plate 33 is also formed with an exhaust structure 32, and the gas inside the electrode group 20 can enter the exhaust channel through the exhaust structure 32, and then be discharged through the pressure relief valve 14, so that the flow path of the gas inside the electrode group 20 is relatively smooth.
[0038] Reference Figure 3-Figure 6 According to some embodiments of the present utility model, the exhaust structure 32 includes a main exhaust hole 321 and an auxiliary exhaust hole 322, the main exhaust hole 321 is opposite to the pressure relief valve 14, and the auxiliary exhaust holes 322 are distributed on two opposite sides of the main exhaust hole 321 along the first direction. The exhaust structure 32 includes a main exhaust hole 321 and an auxiliary exhaust hole 322, the main exhaust hole 321 is opposite to the pressure relief valve 14, part of the gas inside the electrode group 20 can enter the exhaust channel through the main exhaust hole 321 and be discharged through the pressure relief valve 14, and the auxiliary exhaust holes 322 are distributed on two opposite sides of the main exhaust hole 321 along the first direction, and another part of the gas inside the electrode group 20 that cannot enter the exhaust channel through the main exhaust hole 321 and be discharged through the pressure relief valve 14 can enter the exhaust channel through the auxiliary exhaust hole 322, and then be discharged through the pressure relief valve 14.
[0039] Reference Figure 3-Figure 6 According to some embodiments of the present invention, a plurality of auxiliary exhaust holes 322 located on the same side of the main exhaust hole 321 along the first direction are arranged along the first direction and the third direction (refer to the e3 direction of the accompanying drawings), the first direction, the second direction and the third direction are perpendicular to each other, and the main exhaust hole 321 and the auxiliary exhaust hole 322 both extend along the first direction. The auxiliary exhaust holes 322 are distributed on the opposite sides of the main exhaust hole 321 along the first direction, and the plurality of auxiliary exhaust holes 322 located on the same side of the main exhaust hole 321 along the first direction are arranged along the first direction and the third direction, so that the auxiliary exhaust holes 322 are distributed on the exhaust plate 33 more evenly, so that the gas inside the pole group 20 can enter the exhaust channel more evenly. In addition, the main exhaust hole 321 and the plurality of auxiliary exhaust holes 322 both extend along the first direction, so that the main exhaust hole 321 and the auxiliary exhaust hole 322 have a larger area, so that the gas inside the pole group 20 can enter the exhaust channel more quickly, and then can be discharged through the pressure relief valve 14 more quickly.
[0040] It should be noted that the “plurality” in the present invention refers to two or more than two.
[0041] Reference Figure 3-Figure 6 According to some embodiments of the utility model, the support ribs 34 are distributed on opposite sides of the main exhaust hole 321 along the third direction and on opposite sides of the auxiliary exhaust hole 322 along the third direction, and the support ribs 34 extend along the first direction. The support ribs 34 are distributed on opposite sides of the main exhaust hole 321 along the third direction and on opposite sides of the auxiliary exhaust hole 322 along the third direction, and define an exhaust channel with the side plate 12, so that the gas can enter the exhaust channel through the auxiliary exhaust hole 322 and the main exhaust hole 321 more smoothly. In addition, the support ribs 34 are distributed on opposite sides of the main exhaust hole 321 along the third direction and on opposite sides of the auxiliary exhaust hole 322 along the third direction, so that the support ribs 34 are more evenly distributed on the exhaust plate 33, which can greatly improve the overall structural strength of the exhaust channel member 30.
[0042] Reference Figure 3-Figure 6 According to some embodiments of the present invention, a plurality of auxiliary exhaust holes 322 located on the same side of the main exhaust hole 321 along the first direction are arranged along the first direction and the third direction, the first direction, the second direction and the third direction are perpendicular to each other, the main exhaust hole 321 and the auxiliary exhaust hole 322 both extend along the first direction, the supporting ribs 34 are distributed on the opposite sides of the main exhaust hole 321 along the third direction and on the opposite sides of the auxiliary exhaust hole 322 along the third direction, and the supporting ribs 34 extend along the first direction.
[0043] The auxiliary exhaust holes 322 are distributed on opposite sides of the main exhaust hole 321 along the first direction, and the plurality of auxiliary exhaust holes 322 located on the same side of the main exhaust hole 321 along the first direction are arranged along the first direction and the third direction, so that the auxiliary exhaust holes 322 are distributed more evenly on the exhaust plate 33, so that the gas inside the electrode group 20 can enter the exhaust channel more evenly. In addition, the main exhaust hole 321 and the plurality of auxiliary exhaust holes 322 are extended along the first direction, so that the main exhaust hole 321 and the auxiliary exhaust holes 322 have a larger area, so that the gas inside the electrode group 20 can enter the exhaust channel more quickly, and then can be discharged more quickly through the pressure relief valve 14, and the supporting ribs 34 are distributed on opposite sides of the main exhaust hole 321 along the third direction and on opposite sides of the auxiliary exhaust hole 322 along the third direction, and define the exhaust channel with the side plate 12, so that the gas can enter the exhaust channel more smoothly through the auxiliary exhaust holes 322 and the main exhaust hole 321. In addition, the supporting ribs 34 are distributed on the opposite sides of the main exhaust hole 321 along the third direction and on the opposite sides of the auxiliary exhaust hole 322 along the third direction, so that the supporting ribs 34 are distributed more evenly on the exhaust plate 33, which can greatly improve the overall structural strength of the exhaust channel component 30.
[0044] Reference Figure 4-Figure 5 According to some embodiments of the present invention, the thickness of the exhaust plate 33 ranges from 0.5 mm to 2.5 mm, such as 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, etc. If the thickness of the exhaust plate 33 is less than 0.5 mm, the thickness of the exhaust plate 33 is small, which will result in a lower overall structural strength of the exhaust channel member 30; if the thickness of the exhaust plate 33 is greater than 2.5 mm, the thickness of the exhaust plate 33 will be thicker, resulting in a higher space occupancy rate of the exhaust channel member 30 in the battery housing 10, resulting in a lower energy density of the battery cell 100. By setting the thickness range of the exhaust plate 33 to 0.5 mm to 2.5 mm, the thickness of the exhaust plate 33 is moderate, so that the overall structural strength of the exhaust channel member 30 is higher, and the battery cell 100 can have a higher energy density.
[0045] Reference Figure 4-Figure 5According to some embodiments of the present invention, the height of the support rib 34 is in the range of 0.5mm-2.5mm, such as 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, etc. If the height of the support rib 34 is less than 0.5mm, the height of the support rib 34 is low, which will result in a smaller space in the exhaust channel, so that less gas enters the exhaust channel through the exhaust structure 32; if the height of the support rib 34 is greater than 2.5mm, the height of the support rib 34 is high, which will result in a higher space occupancy rate of the exhaust channel member 30 in the battery housing 10, so that the energy density of the battery cell 100 is low. By setting the height of the support rib 34 in the range of 0.5mm-2.5mm, the height of the support rib 34 is moderate, so that the exhaust channel has sufficient exhaust space, and the battery cell 100 can have a higher energy density.
[0046] Reference Figure 4-Figure 5 According to some embodiments of the present invention, the thickness of the exhaust plate 33 ranges from 0.5 mm to 2.5 mm, for example, the thickness of the exhaust plate 33 may be 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, etc., and the protrusion height of the supporting rib 34 ranges from 0.5 mm to 2.5 mm, for example, the protrusion height of the supporting rib 34 may be 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, etc. By setting the thickness of the exhaust plate 33 to range from 0.5 mm to 2.5 mm and the protrusion height of the supporting rib 34 to range from 0.5 mm to 2.5 mm, the thickness of the exhaust plate 33 and the protrusion height of the supporting protrusion are moderate, so that the overall structural strength of the exhaust channel member 30 is high, and at the same time, the exhaust channel can have sufficient exhaust space and the battery cell 100 can have a high energy density.
[0047] Reference Figure 3-Figure 6 According to some embodiments of the present invention, the exhaust channel member 30 is a plastic member, so that the exhaust channel member 30 has better insulation and vibration resistance, and is lighter in weight and lower in cost.
[0048] Optionally, the exhaust channel member 30 may be a high temperature resistant plastic member.
[0049] Reference Figure 3-Figure 6 According to some embodiments of the present invention, the exhaust channel member 30 is an integrally formed member, which can reduce the difficulty of assembling the exhaust channel member 30 and make the exhaust channel member 30 have a higher structural strength, thereby improving the structural strength of the battery cell 100 .
[0050] Reference Figure 3-Figure 6According to some embodiments of the utility model, the exhaust duct member 30 is a plastic member, and the exhaust duct member 30 is an integrally formed member, which can reduce the difficulty of assembling the exhaust duct member 30 and enable the exhaust duct member 30 to have a higher structural strength, thereby improving the structural strength of the battery cell 100. At the same time, the exhaust duct member 30 can have better insulation and vibration resistance, and can be lighter in weight and lower in cost.
[0051] Reference Figure 1-Figure 2 According to some embodiments of the present invention, the exhaust channel member 30 is fixed to the electrode group 20, which can make the assembly process of the battery cell 100 simpler and more convenient to operate. For example, the electrode group 20 includes two end faces 22 and two side faces 23, wherein the two end faces 22 of the electrode group 20 correspond to the two cover plates 11 of the battery housing 10 respectively, and the two side faces 23 of the electrode group 20 correspond to the two side plates 12 of the battery housing 10 respectively, and a pressure relief valve 14 is provided on one of the side plates 12 of the battery housing 10. The assembly process of the battery cell 100 can be as follows:
[0052] First, the exhaust channel member 30 is fixed to one of the side surfaces 23 of the electrode assembly 20 .
[0053] Secondly, the electrode group 20 with the exhaust channel member 30 fixed thereto is installed inside the battery housing 10, and the side 23 of the electrode group 20 with the exhaust channel member 30 fixed thereto corresponds to the side plate 12 of the battery housing 10 with the pressure relief valve 14 provided thereto, so that an exhaust channel can be defined between the exhaust channel member 30 and the side plate 12 with the pressure relief valve 14 provided thereto.
[0054] Finally, the pole 13 on the cover plate 11 of the battery housing 10 is electrically connected to the pole group 20 .
[0055] Reference Figure 1-Figure 2 According to some embodiments of the present invention, the outer surface of the electrode group 20 is coated with an insulating film 21, and the exhaust channel member 30 is connected to the insulating film 21 by heat-melting. By providing the insulating film 21 on the outer surface of the electrode group 20, the insulating film 21 can play an insulating protection role, and can prevent the electrode group 20 from directly contacting the battery housing 10 and causing a short circuit. In addition, the exhaust channel member 30 is connected to the insulating film 21 by heat-melting, and the connection method is relatively simple, the operation is relatively convenient, and the exhaust channel member 30 can be installed more firmly.
[0056] Reference Figure 1-Figure 2According to some embodiments of the utility model, a first positioning hole 35 is formed on the exhaust channel member 30, the outer surface of the electrode group 20 is covered with an insulating film 21, and a second positioning hole is formed on the portion of the insulating film 21 facing the exhaust channel member 30, and the second positioning hole and the first positioning hole 35 are arranged opposite to each other in the second direction. By providing the insulating film 21 on the outer surface of the electrode group 20, the insulating film 21 can play a role of insulation protection, and can avoid the situation where the electrode group 20 and the battery housing 10 are in direct contact and cause a short circuit. In addition, by providing the first positioning hole 35 on the exhaust channel member 30 and the second positioning hole on the portion of the insulating film 21 facing the exhaust channel member 30, during the installation process of the exhaust channel member 30, by correspondingly providing the first positioning hole 35 of the exhaust channel member 30 with the second positioning hole of the insulating film 21, a positioning function can be played, and the installation position of the exhaust channel member 30 can be made more accurate.
[0057] Reference Figure 1-Figure 2 According to some embodiments of the utility model, the size range of the battery housing 10 in the first direction is 300mm-1000mm, such as 300mm, 500mm, 700mm, 900mm, 1000mm, etc., the size range of the battery housing 10 in the second direction is 50mm-150mm, such as 50mm, 80mm, 100mm, 120mm, 150mm, etc., the size range of the battery housing 10 in the third direction is 12mm-30mm, such as 12mm, 15mm, 20mm, 25mm, 30mm, etc., and the first direction, the second direction and the third direction are perpendicular to each other. By setting the size range of the battery housing 10 in the first direction to 300mm-1000mm and the size range of the battery housing 10 in the third direction to 12mm-30mm, the side plate 12 of the battery housing 10 can have sufficient installation space, which can facilitate the installation of the pressure relief valve 14. By setting the size range of the battery housing 10 in the second direction to 50mm-150mm and the size range of the battery housing 10 in the third direction to 12mm-30mm, the cover plate 11 of the battery housing 10 can have sufficient installation space, which can facilitate the installation of the pole 13.
[0058] Reference Figure 1-Figure 2 The battery pack according to the second embodiment of the present invention includes the battery cell 100 according to the first embodiment of the present invention.
[0059] According to the battery pack of the embodiment of the utility model, by setting the above-mentioned battery cell 100, an exhaust channel member 30 is provided between the electrode group 20 and the side plate 12 of the battery cell 100, and an exhaust channel is defined between the exhaust channel member 30 and the side plate 12. The gas inside the electrode group 20 can flow relatively smoothly to the relevant position of the pressure relief valve 14 through the exhaust channel, which can reduce or avoid the situation where the gas inside the electrode group 20 cannot be discharged in time, thereby improving the safety of the battery cell 100 and further improving the safety of the battery pack.
[0060] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0061] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.
Claims
1. A battery cell, characterized in that: include: A battery housing, comprising two cover plates arranged along a first direction and two side plates arranged along a second direction, wherein the second direction is perpendicular to the first direction, the cover plates are provided with poles, and at least one of the side plates is provided with a pressure relief valve; An electrode group is disposed in the battery housing, and the electrode column is electrically connected to the electrode group; An exhaust channel member is provided in the battery housing and between the electrode group and the side plate. An exhaust channel is defined between the exhaust channel member and the side plate. An exhaust structure is formed on the exhaust channel member.
2. The battery cell according to claim 1, characterized in that: The exhaust channel member includes an exhaust plate and a supporting rib disposed on the exhaust plate. The supporting rib is located on a side of the exhaust plate facing the side plate. The exhaust structure is formed on the exhaust plate.
3. The battery cell according to claim 2, characterized in that: The exhaust structure includes a main exhaust hole and an auxiliary exhaust hole, the main exhaust hole is opposite to the pressure relief valve, and the auxiliary exhaust holes are distributed on two opposite sides of the main exhaust hole along the first direction.
4. The battery cell according to claim 3, characterized in that: The plurality of auxiliary exhaust holes located on the same side of the main exhaust hole along the first direction are arranged along the first direction and a third direction, the first direction, the second direction and the third direction are perpendicular to each other, and the main exhaust hole and the auxiliary exhaust holes both extend along the first direction; And / or, the supporting ribs are distributed on two opposite sides of the main exhaust hole along the third direction and on two opposite sides of the auxiliary exhaust hole along the third direction, and the supporting ribs extend along the first direction.
5. The battery cell according to claim 2, characterized in that: The thickness of the exhaust plate is in the range of 0.5 mm to 2.5 mm; and / or the protrusion height of the supporting rib is in the range of 0.5 mm to 2.5 mm.
6. The battery cell according to claim 2, characterized in that: The exhaust channel component is a plastic component; and / or the exhaust channel component is an integrally formed component.
7. The battery cell according to claim 1, characterized in that: The exhaust channel member is fixed to the pole group.
8. The battery cell according to claim 7, characterized in that: The outer surface of the pole group is covered with an insulating film, and the exhaust channel component is hot-melt connected to the insulating film; or, a first positioning hole is formed on the exhaust channel component, the outer surface of the pole group is covered with an insulating film, and a second positioning hole is formed on the part of the insulating film facing the exhaust channel component, and the second positioning hole is arranged opposite to the first positioning hole in the second direction.
9. The battery cell according to claim 1, characterized in that: The size of the battery shell in the first direction ranges from 300mm to 1000mm, the size of the battery shell in the second direction ranges from 50mm to 150mm, the size of the battery shell in the third direction ranges from 12mm to 30mm, and the first direction, the second direction and the third direction are perpendicular to each other.
10. A battery pack, characterized in that: include: A battery cell according to any one of claims 1 to 9.