Battery and vehicle

Abstract

The utility model relates to the field of batteries, and discloses a battery and a vehicle. The battery comprises a shell, a cover plate is arranged on the side portion of the shell, the cover plate is provided with a liquid injection channel, a first port of the liquid injection channel is communicated with the outer side of the cover plate, a second port of the liquid injection channel is communicated with an inner cavity of the shell, and the distance between the second port and the top of the shell is smaller than the distance between the first port and the top of the shell. Therefore, under the condition that the position height of the first port is consistent with the position height of the liquid injection hole in the related technology, the position height of the second port is higher than the position height of the first port, equivalently, the liquid outlet position on the cover plate is lifted, so that the liquid adding amount of the battery is consistent, and the liquid adding amount of the battery is uniform. The electrolyte overflow amount of the battery in the formation process can be eliminated or reduced, so that the problems of electrolyte waste and environmental pollution in the formation process are solved or improved.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, in particular to batteries and vehicles. Background Art

[0002] As the core power source of electric vehicles, the performance and quality of lithium-ion batteries have a crucial impact on the overall performance and service life of the equipment. During the manufacturing process of lithium-ion batteries, multiple steps are required, including winding, assembly, liquid injection, formation, etc., among which liquid injection and formation are particularly critical steps.

[0003] In the related art, liquid injection or formation is usually carried out at the top or side of the battery. Among them, for the battery with liquid injection or formation from the top, the cover plate is arranged at the top of the battery, and the liquid injection hole is arranged on the cover plate at the top of the battery. For the battery with liquid injection or formation from the side, the cover plate is arranged on the side of the battery, and the liquid injection hole is arranged on the cover plate on the side of the battery.

[0004] Since the liquid injection hole of the battery with the cover plate arranged on the side is horizontally arranged, during the formation process, the electrolyte is likely to overflow from the liquid injection hole, resulting in waste of the electrolyte and environmental pollution problems. Summary of the Utility Model

[0005] In view of this, the utility model provides a battery and a vehicle to solve or improve the problem that the electrolyte is likely to overflow from the liquid injection hole during the formation process.

[0006] In a first aspect, the utility model provides a battery, including a housing, and a cover plate is arranged on the side of the housing;

[0007] Wherein, the cover plate is provided with a liquid injection channel, a first port of the liquid injection channel is communicated with the outside of the cover plate, a second port of the liquid injection channel is communicated with the inner cavity of the housing, and the distance between the second port and the top of the housing is less than the distance between the first port and the top of the housing.

[0008] Beneficial effects: By arranging a liquid injection channel on the cover plate of the battery, and the second port of the liquid injection channel is closer to the top of the battery than the first port of the liquid injection channel, during the formation process of the battery, the position height of the second port of the liquid injection channel is higher than the position height of the first port. Therefore, when the position height of the first port is the same as the position height of the liquid injection hole in the related art, the position height of the second port is higher than the position height of the first port, which is equivalent to raising the liquid outlet position on the cover plate. Therefore, under the condition of the same liquid filling amount of the battery, the overflow amount of the battery during the formation process can be eliminated or reduced, thereby solving or improving the problems of waste of the electrolyte and environmental pollution during the formation process.

[0009] In an alternative embodiment, the liquid injection channel includes:

[0010] A first channel segment that penetrates the cover plate along the thickness direction of the cover plate;

[0011] A second channel segment that is disposed in the inner cavity of the housing. One end of the second channel segment is communicated with the first channel segment, and the other end of the second channel segment constitutes the second port of the liquid injection channel.

[0012] In an alternative embodiment, the second channel segment is arranged as a tubular structure, and the tubular structure is hermetically connected to the inner side surface of the cover plate and communicated with the first channel segment.

[0013] In an alternative embodiment, the inner diameter of the tubular structure is larger than the inner diameter of the first channel segment.

[0014] In an alternative embodiment, the second channel segment includes a cover body structure, and the cover body structure is hermetically buckled on the inner side surface of the cover plate, and the second channel segment is formed between the cover body structure and the cover plate.

[0015] In an alternative embodiment, the liquid injection channel includes a first channel segment and a second channel segment that are communicated with each other. Both the first channel segment and the second channel segment are disposed inside the cover plate. Among them, one end of the first channel segment is disposed on the outer side surface of the cover plate, and the end of the second channel segment facing away from the first channel segment is communicated with the inner cavity of the housing.

[0016] In an alternative embodiment, a pole column is provided on the cover plate, and the first port of the liquid injection channel is disposed between the pole column and the top of the housing.

[0017] In an alternative embodiment, an explosion-proof valve is further provided on the cover plate, and the explosion-proof valve is disposed between the first port of the liquid injection channel and the pole column.

[0018] In an alternative embodiment, a limiting structure is further included. A pole core is disposed in the housing, and the limiting structure is disposed between the pole core and the cover plate and connected to the housing, and the limiting structure is used for limiting the pole core.

[0019] In a second aspect, the present invention further provides a vehicle, including the battery as described above.

[0020] Beneficial effects: The vehicle includes the battery, and at the same time includes all the above advantages of the battery, so it will not be elaborated herein. Description of the Drawings

[0021] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 Structural schematic diagram of a battery according to an embodiment of the present invention;

[0023] Figure 2 Structural schematic diagram of another battery according to an embodiment of the present invention;

[0024] Figure 3 Structural schematic diagram of a cover plate according to an embodiment of the present invention;

[0025] Figure 4 Structural schematic diagram of another cover plate according to an embodiment of the present invention;

[0026] Figure 5 Structural schematic diagram of yet another cover plate according to an embodiment of the present invention.

[0027] Explanation of reference numerals:

[0028] 1. Battery; 101. Cover plate; 1011. Liquid injection channel; 1011a. First channel section; 1011b. Second channel section; 102. Outer shell; 103. Terminal post; 104. Explosion-proof valve; 105. Limiting structure; 106. Electrode core; 107. Conductive sheet. Specific embodiments

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0030] In the related art, as shown in Figure 2 For the battery 1 filled with liquid or formed from the side, its cover plate 101 is arranged on the side of the battery 1, and the liquid injection hole is arranged on the cover plate 101 on the side of the battery 1. Since the cover plate 101 of the battery 1 arranged on the side has its liquid injection hole horizontally arranged, during the forming process, the electrolyte is likely to overflow from the liquid injection hole, resulting in problems of electrolyte waste and environmental pollution.

[0031] To solve or improve the problem that the electrolyte easily overflows from the liquid injection hole during the formation process, a battery 1 and a vehicle are provided in the embodiments of the present utility model.

[0032] The following will describe the battery 1 provided in the embodiments of the present utility model in conjunction with Figures 1 to 5 ,

[0033] Specifically, the battery 1 includes a housing 102, and a cover plate 101 is provided on the side of the housing 102.

[0034] Among them, the cover plate 101 is provided with a liquid injection channel 1011. The first port of the liquid injection channel 1011 communicates with the outside of the cover plate 101. The outside of the cover plate 101 is the side of the cover plate 101 facing away from the inner cavity of the housing 102. The second port of the liquid injection channel 1011 communicates with the inner cavity of the housing 102. The distance between the second port and the top of the housing 102 is less than the distance between the first port and the top of the housing 102. The first port is used to connect to a liquid injection device or a formation device. It should be noted that, as shown in Figure 1 , the top of the battery 1 refers to the part of the battery 1 facing upward in the drawing during the liquid injection process or the formation process, that is, the part indicated by A in the drawing. Further, as shown in Figure 1 , if the distance between the second port and the top of the housing 102 is H2, and the distance between the first port and the top of the housing 102 is H1, then H2 < H1. Specifically, as shown in Figures 3 - 5 , the maximum distance between the second port and the top of the housing 102 is less than the maximum distance between the first port and the top of the housing 102.

[0035] In this embodiment, by providing the liquid injection channel 1011 on the cover plate 101 of the battery 1, and the second port of the liquid injection channel 1011 is closer to the top of the battery 1 than the first port of the liquid injection channel 1011, during the formation process of the battery 1, the position height of the second port of the liquid injection channel 1011 is higher than the position height of the first port. Therefore, when the position height of the first port is the same as the position height of the liquid injection hole in the related art, the position height of the second port is higher than the position height of the first port, which is equivalent to raising the height of the liquid outlet position on the cover plate 101. Therefore, under the condition that the liquid addition amount of the battery 1 is the same, the overflow amount of the battery 1 during the formation process can be eliminated or reduced, thereby solving or improving the problems of electrolyte waste and environmental pollution during the formation process.

[0036] As shown in Figures 1 - 4 , in some embodiments provided by the present utility model, the liquid injection channel 1011 includes a first channel segment 1011a and a second channel segment 1011b.

[0037] Among them, the first channel section 1011a penetrates through the cover plate 101 along the thickness direction of the cover plate 101. Refer to Figure 3 and Figure 4 As shown, the thickness direction of the cover plate 101 is the left - right direction in the figure.

[0038] The second channel section 1011b is arranged in the inner cavity of the outer shell 102. One end of the second channel section 1011b is communicated with the first channel section 1011a, and the other end of the second channel section 1011b constitutes the second port of the liquid injection channel 1011.

[0039] In this embodiment, the electrolyte or gas can pass through the cover plate 101 via the first channel section 1011a and the second channel section 1011b, so as to complete the liquid injection or exhaust of the battery 1. The first channel section 1011a is the liquid injection hole on the cover plate 101. By adding the second channel section 1011b to the cover plate 101, the change in the structure and processing technology of the cover plate 101 can be reduced, thereby reducing the improvement cost of the cover plate 101 and further reducing the improvement cost of the battery 1.

[0040] In some embodiments provided by the present utility model, the second channel section 1011b is arranged as a tubular structure. The tubular structure is hermetically connected to the inner side surface of the cover plate 101 and is communicated with the first channel section 1011a. It should be noted that the inner side surface of the cover plate 101 refers to the surface of the cover plate 101 facing the inner cavity of the outer shell 102.

[0041] In this embodiment, the electrolyte or gas can pass through the cover plate 101 via the first channel section 1011a and the tubular structure, so as to complete the liquid injection or exhaust of the battery 1. By adding the tubular structure to the cover plate 101, the change in the structure and processing technology of the cover plate 101 can be reduced, thereby reducing the improvement cost of the cover plate 101 and further reducing the improvement cost of the battery 1. In addition, setting the second channel section 1011b as a tubular structure makes the structure of the second channel section 1011b simpler and the cost lower.

[0042] Refer to Figure 1 and Figure 3 As shown, in some embodiments provided by the present utility model, the tubular structure includes a first pipe section and a second pipe section. The first channel section 1011a, the first pipe section and the second pipe section are connected in sequence, and the pipe orifice of the second pipe section departing from the first pipe section forms the second port.

[0043] In this embodiment, the first pipe section can be coaxially arranged with the first channel section 1011a to facilitate the connection between the tubular structure and the cover plate 101, and the second pipe section extends in the direction away from the bottom 102a of the battery 1 to facilitate raising the height of the liquid outlet position during the formation process.

[0044] Optionally, refer toFigure 2 As shown, the minimum distance between the outer wall of the second pipe section and the cover plate 101 is a, and a ≤ 10 mm. To facilitate the connection between the tubular structure and the cover plate 101, the first pipe section needs to have a preset length. Since the first pipe section has a preset length, there may be a gap between the second pipe section and the cover plate 101. Making a ≤ 10 mm can reduce the distance that the second pipe section protrudes from the surface of the cover plate 101, thereby reducing the problem of interference between the second pipe section and other components in the battery 1.

[0045] Optionally, the minimum distance between the end of the second pipe section facing away from the first pipe section and the top wall of the battery 1 is b, and b ≤ 10 mm. By leaving a gap between the end of the second pipe section facing away from the first pipe section and the top wall of the battery 1, it is convenient for the electrolyte to be injected normally. Making b ≤ 10 mm can maximize the height of the liquid outlet position during the formation process, thereby reducing the overflow amount of the electrolyte.

[0046] Of course, the tubular structure is not limited to including the first pipe section and the second pipe section. For example, in other embodiments provided by the present invention, the tubular structure is set as a straight pipe structure. A communication port is provided on the side wall of the straight pipe structure, and the communication port is communicated with the first channel section 1011a. The straight pipe structure extends towards the top of the battery 1, and an opening is provided at one end of the straight pipe structure facing the top of the battery. The opening forms the second port. With such a setting, the outer side wall of the tubular structure can be directly connected to the cover plate 101, and the height of the tubular structure protruding from the inner side surface of the cover plate 101 is smaller, thereby reducing the problem of interference between the tubular structure and other components in the battery 1.

[0047] Of course, the tubular structure is not limited to being set as the above-mentioned straight pipe structure. For example, in other embodiments provided by the present invention, the tubular structure can also be set as a spiral pipe or a curved pipe.

[0048] In some embodiments provided by the present invention, the tubular structure is set as a metal pipe, a polymer pipe, a corundum pipe, a quartz pipe, a glass pipe or a graphite pipe.

[0049] In some embodiments provided by the present invention, the tubular structure is connected to the cover plate 101 by welding, heat melting, bonding, riveting, sealing ring extrusion connection or is set as an integrally formed structure.

[0050] In some embodiments provided by the present invention, the inner diameter of the tubular structure is larger than the inner diameter of the first channel section 1011a. It can be understood that the inner diameter of the tubular structure is its pipe inner diameter.

[0051] The first channel section 1011a is equivalent to the original liquid injection hole on the cover plate 101. In this embodiment, under the condition that the inner diameter of the tubular structure is larger than the inner diameter of the first channel section 1011a while the aperture of the liquid injection hole remains unchanged, the obstruction of the tubular structure to the electrolyte or gas can be reduced, facilitating the injection of the electrolyte or the discharge of the gas.

[0052] Of course, the second channel section 1011b is not limited to being set as a tubular structure. For example, referring to Figure 4 As shown, in other embodiments provided by the present utility model, the second channel section 1011b includes a cover body structure. The cover body structure is hermetically fastened to the inner side surface of the cover plate 101, and a liquid injection channel 1011 is formed between the cover body structure and the cover plate 101.

[0053] In this embodiment, the electrolyte or gas can pass through the cover plate 101 via the first channel section 1011a and the cover body structure, thereby completing the liquid injection or exhaust of the battery 1. By adding a cover body structure to the cover plate 101, the changes to the structure and processing technology of the cover plate 101 can be reduced, thereby reducing the improvement cost of the cover plate 101 and further reducing the improvement cost of the battery 1. Additionally, since the structure of the cover body structure is more convenient to be set as flat, the height of the cover body structure protruding from the surface of the cover plate 101 can be relatively small, and thus the interference problem between the cover body structure and other parts or structures can be reduced.

[0054] Optionally, the material of the cover body structure and the connection manner between the cover body structure and the cover plate 101 can both refer to the relevant settings of the tubular structure, which will not be elaborated herein.

[0055] Obviously, the second channel section 1011b is not limited to being arranged in the inner cavity of the outer shell 102. For example, in other embodiments provided by the present utility model, the liquid injection channel 1011 includes a first channel section 1011a and a second channel section 1011b that are connected and communicated.

[0056] Among them, both the first channel section 1011a and the second channel section 1011b are arranged inside the cover plate 101. One end of the first channel section 1011a is arranged on the outer side surface of the cover plate 101, and the end of the second channel section 1011b facing away from the first channel section 1011a is communicated with the inner cavity of the outer shell 102. It should be noted that the outer side surface of the cover plate 101 is the side of the cover plate 101 facing away from the inner cavity of the outer shell 102. The inside of the cover plate 101 refers to the inside of the plate body of the cover plate 101.

[0057] In this embodiment, the electrolyte or gas can pass through the cover plate 101 via the first channel section 1011a and the second channel section 1011b, thereby completing the liquid injection or exhaust of the battery 1. By providing the first channel section 1011a and the second channel section 1011b in the cover plate 101, the first channel section 1011a and the second channel section 1011b will not interfere with other components, thus making it more convenient to install and arrange the cover plate 101 or the battery 1.

[0058] Reference Figures 1 - 4 As shown, in some embodiments provided by the present utility model, a pole column 103 is further provided on the cover plate 101. The first port of the liquid injection channel 1011 is arranged between the pole column 103 and the top of the outer shell 102. Among them, the pole column 103 can be a positive pole column or a negative pole column. The pole column 103 can be connected to the electrode core 106 in the outer shell 102 through a conductive sheet 107.

[0059] In this embodiment, by arranging the pole column 103 on one side of the first port away from the top of the battery 1, during the liquid injection or formation process of the battery 1, the first port is located above the pole column 103, so the position height of the first port is higher, and thus the position height of the liquid outlet position can be increased, thereby reducing the overflow amount of the electrolyte.

[0060] In some embodiments provided by the present utility model, an explosion-proof valve 104 is further provided on the cover plate 101. The explosion-proof valve 104 is arranged between the first port of the liquid injection channel 1011 and the pole column 103. By providing the explosion-proof valve 104, when abnormal heat is generated inside the battery 1 resulting in an increase in internal pressure, the explosion-proof valve 104 provides a safety channel for pressure release, preventing leakage, rupture or even explosion of the battery 1 caused by excessive internal pressure.

[0061] In some embodiments provided by the present utility model, the battery 1 further includes a limiting structure 105. An electrode core 106 is provided in the outer shell 102, and the limiting structure 105 is arranged between the electrode core 106 and the cover plate 101 and is connected to the outer shell 102. The limiting structure 105 is used to limit the electrode core 106. In this embodiment, by providing the limiting structure 105 between the electrode core 106 and the cover plate 101 to limit the electrode core 106, the movement of the electrode core 106 can be avoided. For example, when the second channel section 1011b is arranged in the inner cavity of the outer shell 102, the limiting structure 105 can also avoid the problem of interference between the electrode core 106 and the second channel section 1011b.

[0062] Optionally, the limiting structure 105 is set as a limiting net. By setting the limiting net, the electrode core 106 can be limited and the electrolyte can flow. Of course, the limiting structure 105 is not limited to being set as a limiting net. For example, the limiting structure 105 can also be set as a limiting plate, and the limiting plate is provided with flow holes for the electrolyte to flow through. Or, the limiting structure 105 is set as a limiting protrusion, and the limiting protrusion is arranged on the inner wall of the housing.

[0063] Optionally, the limiting structure 105 can be connected to the housing 102 by bonding or welding.

[0064] An embodiment of the present invention also provides a vehicle.

[0065] Specifically, the vehicle includes the battery 1 as described above.

[0066] It should be noted that since the vehicle includes the battery 1, it also includes all the above advantages of the battery 1, so it will not be elaborated here.

[0067] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A battery, characterized in that: The invention comprises a housing (102), a side of which is provided with a cover plate (101), wherein: The cover plate (101) is provided with an injection channel (1011), a first port of the injection channel (1011) is in communication with the outer side of the cover plate (101), a second port of the injection channel (1011) is in communication with the inner cavity of the outer shell (102), and a distance between the second port and the top of the outer shell (102) is smaller than a distance between the first port and the top of the outer shell (102).

2. The battery according to claim 1, characterized in that The injection channel (1011) comprises: A first channel section (1011a) passes through the cover plate (101) along the thickness direction of the cover plate (101); The second channel section (1011b) is arranged in the inner cavity of the shell (102), one end of the second channel section (1011b) is connected to the first channel section (1011a), and the other end of the second channel section (1011b) constitutes the second port of the injection channel (1011).

3. The battery according to claim 2, characterized in that The second channel section (1011b) is configured as a tubular structure, the tubular structure is hermetically connected to the inner side surface of the cover plate (101), and is in communication with the first channel section (1011a).

4. The battery (1) according to claim 3, characterized in that The inner diameter of the tubular structure is greater than the inner diameter of the first channel section (1011a).

5. The battery according to claim 2, characterized in that The second channel section (1011b) comprises a cover structure, the cover structure is tightly buckled on the inner side surface of the cover plate (101), and the second channel section (1011b) is formed between the cover structure and the cover plate (101).

6. The battery (1) according to claim 1, characterized in that The injection channel (1011) comprises a first channel section (1011a) and a second channel section (1011b) which are connected to each other, wherein the first channel section (1011a) and the second channel section (1011b) are both arranged inside the cover plate (101), wherein one end of the first channel section (1011a) is arranged on the outer side surface of the cover plate (101), and one end of the second channel section (1011b) which is opposite to the first channel section (1011a) is connected to the inner cavity of the shell (102).

7. The battery (1) according to claim 1, characterized in that The cover plate (101) is provided with a pole (103), and the first port of the injection channel (1011) is arranged between the pole (103) and the top of the housing (102).

8. The battery according to claim 7, characterized in that The cover plate (101) is also provided with an explosion-proof valve (104), and the explosion-proof valve (104) is arranged between the first port of the injection channel (1011) and the pole (103).

9. The battery according to claim 1, characterized in that It also comprises a limiting structure (105), wherein a pole core (106) is arranged in the shell (102), the limiting structure (105) is arranged between the pole core (106) and the cover plate (101), and is connected to the shell (102), and the limiting structure (105) is used to limit the pole core (106).

10. A vehicle, characterized in that: Comprising a battery (1) as claimed in any one of claims 1 to 9.

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