Battery

Abstract

The utility model relates to the technical field of secondary batteries, and discloses a battery which comprises a shell, a battery cell and a pole. One side part of the shell is arranged in a protruding manner, so that a protruding part and a flat plate part are formed on one side of the shell; the battery cell is arranged in the shell; the pole is arranged corresponding to the flat plate part, and the tab of the battery cell extends into the protruding part and is electrically connected with the pole. According to the battery provided by the utility model, one side part of the shell protrudes to form the protruding part and the flat plate part, under the condition that the height of the battery is fixed, the pole is arranged corresponding to the flat plate part, and the protruding part can extend to the greatest extent in the height direction of the battery, so that the space in the shell is increased, and the capacity of a battery cell is improved; and the tabs of the battery cells extend into the protruding parts, so that the newly added space is reasonably utilized, a certain space is vacated for the battery cells, and the space utilization rate of the battery is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of secondary batteries, in particular to batteries. Background Art

[0002] With the continuous progress of society, secondary batteries have gradually become a new type of energy storage component and are widely used in many fields such as automobiles and machinery. Electrical equipment is connected to the battery cell through the pole to obtain electrical energy. However, the current traditional batteries are mostly square shells, and the poles are pushed out of the shell along the height direction of the battery. In this way, the installation arrangement of the poles will occupy the space in the height direction of the battery, thereby reducing the capacity of the battery cell in the shell and reducing the space utilization. Utility Model Content

[0003] In view of this, the utility model provides a battery to solve the problem in the prior art that the arrangement of the battery pole affects the capacity of the battery cell and reduces the space utilization.

[0004] In a first aspect, the utility model provides a battery, comprising:

[0005] A shell, one side of which is partially protruding to form a protruding portion and a flat portion on one side of the shell; a battery cell, which is arranged in the shell; and a pole, which is arranged corresponding to the flat portion, and a pole ear of the battery cell extends into the protruding portion and is electrically connected to the pole.

[0006] Beneficial effect: A protruding portion and a flat portion are formed by partially protruding from one side of the shell. When the battery height is constant, the pole is arranged corresponding to the flat portion, and the protruding portion can be extended to the maximum in the height direction of the battery, thereby increasing the space in the shell and improving the capacity of the battery cell; the pole ear of the battery cell extends into the protruding portion, which makes rational use of the newly added space and frees up a certain amount of space for the battery cell, thereby improving the space utilization rate of the battery.

[0007] In an optional embodiment, two flat plate portions are provided, and the two flat plate portions are provided on opposite sides of the protrusion.

[0008] In an optional implementation, the pole includes a positive pole and a negative pole, and the positive pole and the negative pole are respectively arranged corresponding to the two flat plate portions.

[0009] In an optional embodiment, the battery further includes an explosion-proof valve, and the explosion-proof valve is disposed on the casing.

[0010] Beneficial effect: By setting up an explosion-proof valve, when gas is generated due to thermal runaway inside the battery, the gas can be discharged through the explosion-proof valve, thereby improving the safety of the battery.

[0011] In an optional embodiment, the explosion-proof valve is arranged on a side of the housing facing away from the protrusion.

[0012] Beneficial effect: When gas is generated inside the battery, the explosion-proof valve arranged away from the protrusion will open downward, blocking or delaying ignition, thereby improving driving safety.

[0013] In an optional embodiment, the explosion-proof valve is also provided on the side of the shell where the protrusion is provided, and the opening pressure of the explosion-proof valve provided away from the protrusion is lower than the opening pressure of the explosion-proof valve provided on one side of the protrusion.

[0014] Beneficial effect: When gas is generated inside the battery, the explosion-proof valve arranged away from the protrusion will open downward preferentially. When the gas production gradually increases, the explosion-proof valve arranged on one side of the protrusion opens. By setting two explosion-proof valves, double safety protection for the battery is achieved.

[0015] In an optional embodiment, the notch depth of the explosion-proof valve disposed away from the protrusion is greater than the notch depth of the explosion-proof valve disposed on one side of the protrusion.

[0016] Beneficial effect: The deeper the notch, the smaller the opening pressure of the explosion-proof valve, ensuring that when gas is generated inside the battery, the explosion-proof valve arranged away from the protruding part is opened first to block or delay ignition, thereby improving driving safety.

[0017] In an optional embodiment, the shell includes a shell and a cover plate, the protrusion and the flat plate are arranged corresponding to one side of the shell, an opening is formed on the other side of the shell, and the cover plate is arranged corresponding to the opening and connected to the shell.

[0018] In an optional embodiment, the shell further includes a boss, the boss is connected to the inner wall of the shell and is close to the cover plate, the boss and the shell form a step shape, and the cover plate is embedded in the opening and abuts against the boss.

[0019] Beneficial effect: By setting the boss, the boss and the shell form a step shape, and the cover plate is embedded in the opening of the shell, which facilitates the positioning and assembly of the cover plate before welding.

[0020] In an optional embodiment, the battery further includes an upper plastic, the upper plastic is arranged corresponding to the pole, and the upper plastic is arranged on the pole and the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the exploded structure of a battery according to an embodiment of the utility model from a first angle;

[0023] Figure 2 This is a schematic diagram of the overall structure of the housing of an embodiment of the utility model;

[0024] Figure 3 It is a schematic cross-sectional structural diagram of a housing of an embodiment of the utility model;

[0025] Figure 4 for Figure 3 A is a partial enlarged schematic diagram;

[0026] Figure 5 A schematic diagram of the exploded structure of a battery according to an embodiment of the utility model at a second angle;

[0027] Figure 6 for Figure 5 A partial enlarged schematic diagram of B in the figure.

[0028] Description of reference numerals:

[0029] 10. Shell; 11. Protruding portion; 12. Flat portion; 13. Shell; 131. Opening; 14. Cover plate; 15. Boss; 16. First mounting hole; 17. Second mounting hole; 20. Battery cell; 30. Pole; 40. Explosion-proof valve; 50. Explosion-proof valve patch; 60. Upper plastic. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0031] Combine the following Figures 1 to 6 , describing an embodiment of the utility model.

[0032] According to an embodiment of the utility model, on the one hand, a battery is provided, comprising a housing 10, a battery cell 20 and a pole 30. One side of the housing 10 is partially protruded to form a protruding portion 11 and a flat portion 12 on one side of the housing 10; the battery cell 20 is disposed in the housing 10; the pole 30 is disposed corresponding to the flat portion 12, and the pole lug of the battery cell 20 extends into the protruding portion 11 and is electrically connected to the pole 30.

[0033] In the battery using this embodiment, a protruding portion 11 and a flat portion 12 are formed by partially protruding one side of the outer shell 10. When the height of the battery is constant, the pole 30 is arranged corresponding to the flat portion 12, and the protruding portion 11 can be extended to the maximum in the height direction of the battery, thereby increasing the space in the outer shell 10 and improving the capacity of the battery cell 20; the pole ear of the battery cell 20 extends into the protruding portion 11, and the space of the newly added protruding portion 11 is reasonably utilized, while also freeing up a certain amount of space for the battery cell 20, thereby improving the space utilization rate of the battery.

[0034] It should be noted that the battery height refers to the distance from the top plane of the pole 30 to the bottom plane of the housing 10 .

[0035] Furthermore, in the related art, the pole 30 pushes out of the housing 10 upward along the height direction of the battery, and the top of the housing 10 is mostly a plane. When the battery height is constant, in order to meet the battery height dimension requirements, the distance from the top to the bottom of the housing 10 becomes relatively short. In this embodiment, the portion of the top of the housing 10 where the pole 30 is not installed is protruded upward to form a protrusion 11, which increases the space in the housing 10 compared to the battery of the related art and increases the capacity of the battery cell 20.

[0036] It should be noted that the tab has a certain thickness. In the related art, the arrangement and connection of the tab requires the space of the battery cell 20. In this embodiment, by forming the protrusion 11 and arranging the tab in the protrusion 11, space is freed for the battery cell 20, and the newly added space is reasonably utilized, thereby improving the space utilization rate of the battery.

[0037] Specifically, the height of the protrusion 11 is 1 mm-10 mm, which is selected according to actual conditions.

[0038] In one embodiment, Figure 1 and Figure 2 As shown, two flat plate portions 12 are provided, and the two flat plate portions 12 are disposed on two opposite sides of the protruding portion 11 .

[0039] For details, please refer to Figure 1 The protruding portion 11 and the two flat plate portions 12 are combined to form a “convex” shaped structure.

[0040] It should be noted that, in other alternative implementations, the flat plate portion 12 may also be disposed on the left side or the right side of the protruding portion 11 .

[0041] In one embodiment, Figure 1 As shown, the pole 30 includes a positive pole and a negative pole, and the positive pole and the negative pole are respectively arranged corresponding to the two flat plate parts 12 .

[0042] Specifically, the height of the positive electrode column and the negative electrode column are both 1 mm-10 mm, which is selected according to actual conditions.

[0043] In one embodiment, Figure 1 As shown, the battery further includes an explosion-proof valve 40 , which is disposed on the housing 10 .

[0044] For details, please refer to Figure 1 and Figure 5 A first mounting hole 16 is opened on the housing 10 , and the explosion-proof valve 40 is installed corresponding to the first mounting hole 16 .

[0045] Furthermore, the first mounting hole 16 is an oblong hole.

[0046] Of course, in other alternative implementations, the first mounting hole 16 may also be in other shapes, and the specific shape is selected according to the actual situation of the explosion-proof valve 40 .

[0047] It is worth noting that, by providing the explosion-proof valve 40 , when gas is generated due to thermal runaway inside the battery, the gas can be discharged through the explosion-proof valve 40 , thereby improving the safety of the battery.

[0048] In one embodiment, Figure 1 and Figure 5 As shown, the explosion-proof valve 40 is arranged on a side of the housing 10 facing away from the protruding portion 11 .

[0049] It is worth noting that in the related art, the explosion-proof valve 40 is mostly arranged at the top of the battery cell 20. When the battery has thermal runaway, the explosion-proof valve 40 opens upward, and the high-temperature electrolyte will be sprayed upward to the vehicle body, which poses a greater threat to the safety of the driver and passengers. Therefore, in this embodiment, an explosion-proof valve 40 is provided away from the protrusion 11. When the battery has thermal runaway, the explosion-proof valve 40 opens downward, and the high-temperature electrolyte will be sprayed downward to the bottom of the vehicle body, which plays a certain protective role for the driver and passengers.

[0050] It is worth noting that when gas is generated inside the battery, the explosion-proof valve 40 disposed away from the protrusion 11 will open downward to block or delay ignition, thereby improving battery safety.

[0051] In one embodiment, Figure 1 and Figure 5As shown, the battery further includes an explosion-proof valve patch 50 , and the explosion-proof valve patch 50 is arranged corresponding to the side of the explosion-proof valve 40 facing away from the housing 10 .

[0052] It is worth noting that by providing the explosion-proof valve patch 50, the explosion-proof valve 40 is prevented from over-expanding when the battery is abnormal, thereby reducing the scope of damage.

[0053] In one embodiment, Figure 1 As shown, the side of the housing 10 provided with the protrusion 11 is also provided with an explosion-proof valve 40 , and the valve opening pressure of the explosion-proof valve 40 provided away from the protrusion 11 is lower than the valve opening pressure of the explosion-proof valve 40 provided on one side of the protrusion 11 .

[0054] It is worth mentioning that when gas is generated inside the battery, the explosion-proof valve 40 arranged away from the protrusion 11 will open downward first. When the gas production gradually increases, the explosion-proof valve 40 arranged on one side of the protrusion 11 will open. By setting two explosion-proof valves 40, double safety protection for the battery is achieved.

[0055] In one embodiment, the notch depth of the explosion-proof valve 40 disposed away from the protrusion 11 is greater than the notch depth of the explosion-proof valve 40 disposed on one side of the protrusion 11 .

[0056] It is worth noting that the deeper the notch, the smaller the valve opening pressure of the explosion-proof valve 40, ensuring that when gas is generated inside the battery, the explosion-proof valve 40 set away from the protrusion 11 is opened first to block or delay ignition and improve driving safety.

[0057] Of course, in other alternative implementations, the opening pressure of the explosion-proof valve 40 may also be adjusted in other ways, such as adjusting the effective explosion area of ​​the explosion-proof valve 40 .

[0058] In one embodiment, the housing 10 includes a shell 13 and a cover plate 14 , the protrusion 11 and the flat plate 12 are arranged corresponding to one side of the shell 13 , an opening 131 is formed on the other side of the shell 13 , and the cover plate 14 is arranged corresponding to the opening 131 and connected to the shell 13 .

[0059] Specifically, in this embodiment, the cover plate 14 and the housing 13 are connected by welding.

[0060] Of course, in other alternative embodiments, the cover plate 14 and the housing 13 may also be connected in other connection ways.

[0061] Specifically, two explosion-proof valves 40 are provided, wherein one explosion-proof valve 40 is provided on the protruding portion 11 , and the other explosion-proof valve 40 is provided on the cover plate 14 .

[0062] In one embodiment, Figure 5 and Figure 6As shown, the housing 10 further includes a boss 15 , which is connected to the inner wall of the shell 13 and close to the cover 14 . The boss 15 and the shell 13 form a step shape, and the cover 14 is embedded in the opening 131 and abuts against the boss 15 .

[0063] Specifically, the length of the opening 131 is greater than the length of the cover plate 14 , the width of the opening 131 is greater than the width of the cover plate 14 , and the four rounded corners of the opening 131 are greater than the four rounded corners of the cover plate 14 , ensuring that the cover plate 14 can be embedded in the opening 131 .

[0064] It is worth noting that, by providing the boss 15 , the boss 15 and the housing 13 form a step shape, and the cover plate 14 is embedded in the opening 131 , which facilitates the positioning and assembly of the cover plate 14 before welding.

[0065] In one embodiment, Figure 1 As shown, the battery further includes an upper plastic 60 , which is disposed corresponding to the pole 30 , and is disposed on the pole 30 and the housing 10 .

[0066] For details, please refer to Figures 1 to 4 A second mounting hole 17 is formed on the housing 10 , a through hole is formed on the upper plastic 60 , and the pole 30 passes through the upper plastic 60 and is fixed in the second mounting hole 17 .

[0067] For further information, see Figure 1 There are two second mounting holes 17, and the two second mounting holes 17 are used to mount the positive pole and the negative pole respectively, and the center distance between the two second mounting holes 17 is 20mm-500mm.

[0068] It should be noted that the center distance of the second mounting holes 17 is selected according to actual conditions.

[0069] When thermal runaway occurs in the battery of this embodiment, the explosion-proof valve 40 disposed away from the protrusion 11 opens downward first; when the gas production gradually increases, the explosion-proof valve 40 disposed on one side of the protrusion 11 opens.

[0070] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A battery, characterized in that: include: A housing (10), wherein one side portion of the housing (10) is protrudingly arranged to form a protruding portion (11) and a flat plate portion (12) on one side of the housing (10); A battery cell (20) is disposed in the housing (10); A pole (30) is arranged corresponding to the flat plate portion (12); a pole ear of the battery cell (20) extends into the protruding portion (11) and is electrically connected to the pole (30).

2. The battery according to claim 1, characterized in that Two flat plate portions (12) are provided, and the two flat plate portions (12) are respectively arranged on two opposite sides of the protruding portion (11).

3. The battery according to claim 2, characterized in that The pole (30) comprises a positive pole and a negative pole, and the positive pole and the negative pole are respectively arranged corresponding to the two flat plate parts (12).

4. The battery according to any one of claims 1 to 3, characterized in that: The battery further comprises an explosion-proof valve (40), and the explosion-proof valve (40) is arranged on the housing (10).

5. The battery according to claim 4, characterized in that The explosion-proof valve (40) is arranged on a side of the housing (10) away from the protruding portion (11).

6. The battery according to claim 5, characterized in that The explosion-proof valve (40) is also arranged on the side of the housing (10) on which the protrusion (11) is arranged, and the valve opening pressure of the explosion-proof valve (40) arranged away from the protrusion (11) is lower than the valve opening pressure of the explosion-proof valve (40) arranged on the side of the protrusion (11).

7. The battery according to claim 6, characterized in that The depth of the notch of the explosion-proof valve (40) disposed away from the protruding portion (11) is greater than the depth of the notch of the explosion-proof valve (40) disposed on one side of the protruding portion (11).

8. The battery according to any one of claims 1 to 3, characterized in that: The housing (10) comprises a shell (13) and a cover plate (14); the protruding portion (11) and the flat portion (12) are arranged corresponding to one side of the shell (13); an opening (131) is formed on the other side of the shell (13); and the cover plate (14) is arranged corresponding to the opening (131) and is connected to the shell (13).

9. The battery according to claim 8, characterized in that The housing (10) further comprises a boss (15), the boss (15) being connected to the inner wall of the shell (13) and close to the cover plate (14), the boss (15) and the shell (13) forming a step shape, and the cover plate (14) being embedded in the opening (131) and abutting against the boss (15).

10. The battery according to any one of claims 1 to 3, characterized in that: The battery further comprises an upper plastic (60), wherein the upper plastic (60) is arranged corresponding to the pole (30), and the upper plastic (60) is arranged on the outer shell (10).

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