Battery casing and battery

Abstract

This utility model relates to a battery casing and a battery. The battery casing includes a housing and terminals. The housing includes a main body and two protrusions. A main receiving cavity is formed within the main body, and two protrusions spaced apart along a first direction are formed on one side of the main body. The lengths of the two protrusions in the first direction are L1 and L2, respectively, and L1≠L2. A secondary receiving cavity communicating with the main receiving cavity is formed within each protrusion. At least one of the protrusions is provided with a terminal, which is installed at the end of the protrusion opposite to the main body. By providing two spaced protrusions in the housing, the two protrusions can be used to individually accommodate the tabs in the electrode assembly, avoiding the formation of large gaps inside the housing and improving the utilization rate of the internal space of the entire battery. Furthermore, the two protrusions are of different sizes, which provides a foolproof function, facilitating the identification of the two protrusions during manufacturing and preventing incorrect assembly of the positive and negative tabs in the electrode assembly.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery casing and a battery containing the battery casing. Background Technology

[0002] A battery generally consists of a casing and an electrode assembly housed within the casing. The electrode assembly is composed of several positive and negative electrodes and a separator, stacked in an alternating pattern. Terminals are mounted on the side walls of the casing to connect the electrode assembly to an external power source or device. Batteries can serve as power sources for electronic devices (mobile phones, tablets, instruments, etc.). In electronic device applications, batteries are generally characterized by their small size, thinness, and compact structure.

[0003] In related technologies, the outer casing is generally square, and the internal cavity for mounting the electrode assembly is also square. (Refer to...) Figure 1 As shown, the electrode assembly includes a current collector 1' and a tab 2' located at one end of the current collector 1', which is electrically connected to the terminal post on the casing. However, due to the presence of the tab 2', there is a large gap between the side of the current collector 1' corresponding to the tab 2' and the inner wall of the casing, resulting in low space utilization inside the casing. Furthermore, when installing the electrode assembly into the casing, the positive and negative tabs may be misaligned during installation, leading to incorrect battery assembly. Utility Model Content

[0004] The purpose of this invention is to provide a battery casing and battery that have high space utilization and can reduce the assembly error rate of the tabs.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A battery casing is provided, comprising:

[0007] The housing includes a main body portion, a main receiving cavity formed therein, and two protrusions extending outward toward the main receiving cavity on one side of the main body portion. The two protrusions are spaced apart along a first direction, and the lengths of the two protrusions in the first direction are L1 and L2, respectively, and L1≠L2. A secondary receiving cavity communicating with the main receiving cavity is formed within each protrusion.

[0008] The pole is provided on at least one of the protrusions, and the pole is installed at the end of the protrusion away from the main body.

[0009] Furthermore, the electrode post is a positive electrode post, which is disposed on one of the protrusions, and the other protrusion and the main body together form the negative electrode of the battery.

[0010] Furthermore, it also includes a negative electrode adapter piece, wherein the positive electrode post and the negative electrode adapter piece are respectively disposed at one end of the two protrusions away from the main body.

[0011] Furthermore, there are two poles, namely a positive pole and a negative pole, which are respectively disposed on the two protrusions.

[0012] Furthermore, it also includes a first insulating element. The pole post includes a connecting post and adapter plates disposed at both ends of the connecting post. The connecting post passes through the protrusion. The two adapter plates are respectively located on the inner and outer sides of the protrusion. The pole post and the protrusion are insulated and isolated from each other by the first insulating element.

[0013] Furthermore, it also includes a second insulating element. The pole post includes a connecting post and an adapter plate disposed at one end of the connecting post. The connecting post passes through the protrusion, and the adapter plate is located outside the protrusion. The pole post and the protrusion are insulated and isolated from each other by the second insulating element.

[0014] Furthermore, the height of the protrusion relative to the main body is H, where H = 1.0 mm to 5.0 mm.

[0015] Furthermore, the two protrusions are located at opposite ends of the main body along the first direction.

[0016] Furthermore, the housing includes a surrounding plate and two cover plates. The surrounding plate forms the main receiving cavity and the secondary receiving cavity. The opposite ends of the surrounding plate form open ends, and the two cover plates are respectively placed over the two open ends.

[0017] Furthermore, the housing includes a main housing and a cover plate. The main housing forms the main receiving cavity and the secondary receiving cavity. One end of the main housing forms an open end, and the cover plate covers the open end.

[0018] A battery is also provided, including an electrode assembly and a battery casing. The electrode assembly includes an electrode body and a positive electrode tab and a negative electrode tab disposed on the electrode body. The electrode body is housed in a main receiving cavity, and the positive electrode tab and the negative electrode tab are respectively housed in two secondary receiving cavities.

[0019] Furthermore, it also includes a protective plate, which is inserted between the two protrusions.

[0020] The advantages of this utility model compared to the prior art are:

[0021] This utility model discloses a battery casing and a battery. By providing two spaced protrusions in the casing, the two protrusions can individually accommodate the tabs in the electrode assembly, avoiding large gaps inside the casing and improving the utilization rate of the internal space of the battery. Furthermore, the two protrusions are of different sizes, which serves as a foolproof feature, facilitating identification of the two protrusions during manufacturing and preventing incorrect assembly of the positive and negative tabs in the electrode assembly. Attached Figure Description

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0023] Figure 1 This is a schematic diagram of an electrode assembly in the prior art.

[0024] Figure 2 This is a schematic diagram of the battery casing according to an embodiment of the present invention.

[0025] Figure 3 This is a partial schematic diagram of the battery casing according to an embodiment of the present invention.

[0026] Figure 4 This is an exploded view of the battery casing according to an embodiment of the present invention.

[0027] Figure 5 This is a schematic diagram of the pole of an embodiment of the present utility model.

[0028] Figure 6 This is a schematic diagram of the first insulating component according to an embodiment of the present invention.

[0029] Figure 7 This is an exploded view of the housing according to an embodiment of the present utility model.

[0030] Figure 8 This is an exploded view of the housing according to another embodiment of the present invention.

[0031] Figure 9 This is a schematic diagram of a battery according to an embodiment of the present invention.

[0032] Figure 1 middle:

[0033] 1′ Current collector; 2′ Electrode;

[0034] Figures 2 to 9 middle:

[0035] 1. Housing; 11. Main body; 110. Main receiving cavity; 12. Protrusion; 120. Secondary receiving cavity; 121. First protrusion; 122. Second protrusion; 124. Mounting hole; 13. Groove; 14. Enclosure plate; 15. Cover plate; 16. Main housing; 2. Pole post; 21. Connecting post; 22. Adapter plate; 3. First insulating component; 31. Outer insulating sheet; 32. Inner insulating sheet; 33. Through hole; 4. Protective plate; 5. Negative electrode adapter plate. Detailed Implementation

[0036] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0037] like Figure 2 and Figure 3 As shown, the present invention provides a battery casing, including a housing 1 and an electrode post 2. The housing 1 is a cavity structure, and its interior is used to accommodate an electrode assembly. The electrode post 2 is mounted on the housing 1 and electrically connected to the electrode assembly, enabling the electrode assembly to conduct electricity to an external power source or electrical device through the electrode post 2. The housing 1 includes a main body 11 and a protrusion 12, which are integrally formed. A main receiving cavity 110 is formed inside the main body 11, which is used to accommodate a current collector in the electrode assembly. A protrusion 12 extending outward toward the main receiving cavity 110 is formed on one side of the main body 11. Alternatively, the protrusion 12 protrudes from one side of the main body 11, with the end of the protrusion 12 facing away from the main body 11 being a free end, extending in a direction away from the main receiving cavity 110. There are two protrusions 12, which are spaced apart along a first direction (X direction in the figure) on one side of the main body 11. The two protrusions 12 are a first protrusion 121 and a second protrusion 122. The length of the first protrusion 121 in the first direction is L1, and the length of the second protrusion 122 in the first direction is L2, and L1 ≠ L2. In this embodiment, the length L1 of the first protrusion 121 is greater than the length L2 of the second protrusion 122. A secondary receiving cavity 120 is formed inside the protrusion 12, which communicates with the main receiving cavity 110 and is used to receive the tabs in the electrode assembly. At least one of the protrusions 12 is provided with a pole post 2, which is installed at the end of the protrusion 12 away from the main body 11, that is, the pole post 2 is installed at the free end of the protrusion 12.

[0038] It is understood that the housing 1 includes a main body 11 and two protrusions 12 spaced apart on one side of the main body 11, making the entire housing 1 have a U-shaped structure. The overall shape of the main receiving cavity 110 and the secondary receiving cavity 120 inside the housing 1 matches the shape of the electrode assembly, that is, the current collector in the electrode assembly is installed in the main receiving cavity 110, and the electrode tabs in the electrode assembly are installed in the secondary receiving cavity 120. This structure helps to improve the occupancy rate of the electrode assembly in the internal space of the housing 1, thereby improving the overall space utilization rate of the battery composed of the battery casing. In addition, the two protrusions 12 correspond to the positive and negative electrodes of the battery. Since the length of the two protrusions 12 is different in the first direction, the two protrusions 12 are of different sizes, which plays a foolproof role, thereby facilitating the identification of the two protrusions 12 during the manufacturing process and avoiding the incorrect assembly of the positive and negative electrode tabs in the electrode assembly.

[0039] Specifically, the battery casing includes a terminal post 2. Terminal post 2 is the positive terminal post, disposed on the first protrusion 121. The second protrusion 122 and the main body 11 together form the negative terminal of the battery. It is understood that the positive terminal post is mounted on the first protrusion 121, and insulation is required between the positive terminal post and the first protrusion 121. The positive terminal post is electrically connected to the positive tab in the electrode assembly. The negative tab in the electrode assembly is connected to the inner wall of the second protrusion 122, making the entire casing 1 the negative terminal of the battery. Since the first protrusion 121 is relatively large, mounting the positive terminal post on the first protrusion 121 provides sufficient installation space. Of course, if the size of the second protrusion 122 meets the installation requirements, the positive terminal post can also be mounted on the second protrusion 122, correspondingly connecting the negative tab in the electrode assembly to the inner wall of the first protrusion 121. In another alternative embodiment, the number of pole posts 2 can be set to two, with the two pole posts 2 respectively mounted on the two protrusions 12, and the two pole posts 2 respectively connected to the positive and negative tabs in the electrode assembly, so that the two pole posts 2 respectively form a positive pole post and a negative pole post.

[0040] Specifically, the battery casing also includes a negative electrode adapter 5, which is used to connect to an external power source or electrical device. In this embodiment, a positive electrode post is mounted on the first protrusion 121, and a negative electrode adapter 5 is mounted on the second protrusion 122. The positive electrode post passes through one end of the first protrusion 121 away from the main body 11, and one end of the positive electrode post is electrically connected to the positive electrode tab in the electrode assembly, while the other end is used to connect to an external power source or electrical device. The negative electrode adapter 5 is disposed at one end of the second protrusion 122 away from the main body 11, and the negative electrode adapter 5 is attached to the outer surface of the second protrusion 122, and is electrically connected to the second protrusion 122. The negative electrode tab in the electrode assembly is connected to the inner surface of the second protrusion 122, and the negative electrode adapter 5 is used to connect to an external power source or electrical device. The function of the negative electrode adapter 5 is to facilitate connection to an external power source or electrical device. Specifically, the negative electrode adapter 5 is a square plate structure that provides a fixed position for the connecting wires of the external power supply or electrical equipment. In some embodiments, the negative electrode adapter 5 can be omitted, and the external power supply or electrical equipment can be directly connected to the second protrusion 122.

[0041] Specifically, two protrusions 12 are located at opposite ends of the main body 11 along a first direction. The housing 1 has an overall cuboid structure, with the main body 11 being the main component of the housing 1. The length direction of the main body 11 is the Z direction shown in the figure, the width direction is the X direction shown in the figure, and the thickness direction is the Y direction shown in the figure. Two protrusions 12 are disposed at one end of the length direction of the main body 11, and the two protrusions 12 are spaced apart along the width direction (i.e., the first direction) of the main body 11. The two protrusions 12 are located at opposite ends of the main body 11 along its width direction. This structure forms a groove 13 between the two protrusions 12 and the main body 11, which can be used to accommodate other electronic devices. Of course, in some embodiments, the protrusions 12 can also be disposed at non-end positions on the main body 11 to accommodate the tab positions in the electrode assembly.

[0042] Specifically, the two protrusions 12 protrude from the main body 11 at the same height, that is, the distance between the free ends of the two protrusions 12 and the main body 11 is the same.

[0043] Specifically, the height of the protrusion 12 relative to the main body 11 is H, where H = 1.0 mm to 5.0 mm. The height H of the protrusion 12 is the straight-line distance from the side of the main body 11 facing the protrusion 12 to the free end of the protrusion 12. The height of the protrusion 12 is matched with the length of the tab in the electrode assembly. In this embodiment, the value range of the height H of the protrusion 12 includes, but is not limited to, 1.0 mm, 1.5 mm, 2.0 mm, 2.5 mm, 3.0 mm, 3.5 mm, 4.0 mm, 4.5 mm, and 5.0 mm.

[0044] Specifically, refer to Figures 4 to 6 As shown, the battery casing also includes a first insulating member 3, which is sandwiched between the terminal post 2 and the protrusion 12, so that the terminal post 2 and the entire casing 1 are insulated and isolated by the first insulating member 3. In this embodiment, the first protrusion 121 is provided with the terminal post 2 and the first insulating member 3, and the second protrusion 122 is directly used as the negative terminal of the battery. The terminal post 2 is installed on the first protrusion 121 by riveting. Correspondingly, the free end of the first protrusion 121 is provided with a mounting hole 124, and the secondary receiving cavity 120 in the first protrusion 121 communicates with the outside of the casing 1 through the mounting hole 124. The mounting hole 124 is used to pass through the terminal post 2 and the first insulating member 3. The terminal post 2 includes a connecting post 21 and an adapter plate 22 provided at both ends of the connecting post 21. The connecting post 21 has a cylindrical structure, and the adapter plate 22 has a circular plate structure. The entire terminal post 2 has an "I" shaped structure. Correspondingly, the first insulating member 3 is also configured with an "I"-shaped structure. The first insulating member 3 includes an outer insulating sheet 31 and an inner insulating sheet 32 ​​arranged in parallel and spaced apart. The outer insulating sheet 31 and the inner insulating sheet 32 ​​are connected and fixed by an insulating post. The first insulating member 3 is provided with a through hole 33, which passes through the outer insulating sheet 31, the inner insulating sheet 32 ​​and the insulating post. The first insulating member 3 passes through the mounting hole 124 of the first protrusion 121, and the side wall of the first protrusion 121 is sandwiched between the outer insulating sheet 31 and the inner insulating sheet 32. The outer insulating sheet 31 abuts against the outer side surface of the first protrusion 121, and the inner insulating sheet 32 ​​abuts against the inner side surface of the first protrusion 121. The connecting post 21 passes through the through hole 33, and the two adapter plates 22 abut against the outer insulating sheet 31 and the inner insulating sheet 32 ​​respectively. This structure allows the adapter plate 22 located outside the first protrusion 121 to be insulated from the first protrusion 121 by the outer insulating sheet 31, the adapter plate 22 located inside the first protrusion 121 to be insulated from the first protrusion 121 by the inner insulating sheet 32, and the connecting post 21 to be insulated from the first protrusion 121 by the insulating post, thereby achieving insulation isolation between the pole post 2 and the first protrusion 121 by the first insulating member 3.

[0045] In another embodiment, the battery casing includes a second insulating member sandwiched between the terminal post 2 and the protrusion 12, so that the terminal post 2 is insulated from the entire casing 1 by the second insulating member. The structure of the second insulating member is similar to that of the first insulating member 3. The difference is that the second insulating member has a "T"-shaped structure and includes an insulating post and an outer insulating sheet 31 disposed at one end of the insulating post. A through hole 33 penetrates the outer insulating sheet 31 and the insulating post. In this embodiment, the terminal post 2 and the second insulating member are disposed on the first protrusion 121, and the second protrusion 122 is directly used as the negative terminal of the battery. The terminal post 2 is installed on the first protrusion 121 by plugging and fixing. Correspondingly, the free end of the first protrusion 121 is provided with a mounting hole 124. The secondary receiving cavity 120 in the first protrusion 121 communicates with the outside of the casing 1 through the mounting hole 124, and the mounting hole 124 is used to pass through the terminal post 2 and the second insulating member. The pole post 2 has a "T"-shaped structure and is installed on the first protrusion 121 by plugging it in. The pole post 2 includes a connecting post 21 and an adapter plate 22 disposed at one end of the connecting post 21. The insulating post of the second insulating member passes through the mounting hole 124 of the first protrusion 121, and the outer insulating sheet 31 abuts against the outer side of the first protrusion 121. The connecting post 21 passes through the through hole 33, and the adapter plate 22 abuts against the outer insulating sheet 31. This structure allows the adapter plate 22 to be insulated from the first protrusion 121 by the outer insulating sheet 31, and the connecting post 21 to be insulated from the first protrusion 121 by the insulating post, thereby achieving insulation isolation between the pole post 2 and the first protrusion 121 through the second insulating member.

[0046] In an optional embodiment, refer to Figure 7 As shown, the housing 1 includes a surrounding plate 14 and two cover plates 15. The surrounding plate 14 has an annular structure, forming a main receiving cavity 110 and a secondary receiving cavity 120. Open ends are formed at opposite ends of the surrounding plate 14, and the two cover plates 15 are respectively placed over the two open ends of the surrounding plate 14. In this embodiment, the housing 1 can be disassembled into three parts for processing. That is, during the manufacturing process, the surrounding plate 14 and the two cover plates 15 are first processed separately, and then the two cover plates 15 are welded to the two open ends of the surrounding plate 14 to form the housing 1. It should be noted that after the surrounding plate 14 and the two cover plates 15 are assembled to form the housing 1, the housing 1 includes a square main body 11 and two protrusions 12 located at one end of the main body 11. Correspondingly, the cover plates 15 have two sidewalls of the main receiving cavity 110 in the thickness direction of the housing 1, and also have two sidewalls of the secondary receiving cavity 120 in the thickness direction of the housing 1.

[0047] In another alternative embodiment, refer to Figure 8As shown, the housing 1 includes a main housing 16 and a cover plate 15. A main receiving cavity 110 and a secondary receiving cavity 120 are formed within the main housing 16. An open end is formed at one end of the main housing 16 along its thickness direction, and the cover plate 15 covers the open end of the main housing 16. In this embodiment, the housing 1 can be disassembled into two parts for processing. That is, during the manufacturing process, the main housing 16 and the cover plate 15 are processed separately, and then the cover plate 15 is welded to the open end of the main housing 16, thus forming the housing 1. It should be noted that after the main housing 16 and the cover plate 15 are assembled to form the housing 1, the housing 1 includes a square main body 11 and two protrusions 12 located at one end of the main body 11. Correspondingly, one sidewall of the main receiving cavity 110 in the thickness direction of the housing 1 and one sidewall of the secondary receiving cavity 120 in the thickness direction of the housing 1 are formed on the cover plate 15. It can also be understood that the main housing 16 is integrally formed by pressing the surrounding plate 14 and the cover plate 15 using sheet metal.

[0048] like Figure 2 , Figure 3 and Figure 9 As shown, this utility model also provides a battery, including a battery casing and an electrode assembly. The battery casing includes a housing 1 and a terminal post 2 mounted on the housing 1. A main receiving cavity 110 and a secondary receiving cavity 120 are formed inside the housing 1. The electrode assembly includes a current collector and a positive electrode tab and a negative electrode tab disposed at one end of the current collector. The shape of the current collector matches the shape of the main receiving cavity 110, and the current collector is installed within the main receiving cavity 110. The positive electrode tab and the negative electrode tab are respectively housed within the two secondary receiving cavities 120. The terminal post 2 is a positive electrode post, and the terminal post 2 is electrically connected to the positive electrode tab. The entire housing 1 forms the negative electrode of the battery, i.e., the negative electrode tab is connected to the inner wall of the housing 1. It should be noted that the electrode assembly is composed of several positive electrode plates, negative electrode plates, and separators stacked alternately, and the corresponding current collector includes the stacked positive electrode plates, negative electrode plates, and separator.

[0049] Specifically, the battery also includes a protection board 4, which is a PCB board. The protection board 4 is electrically connected to the electrode assembly through the terminal posts 2 and the housing 1. The protection board 4 serves to monitor the charge and discharge of the entire battery. A groove 13 is formed between the two protrusions 12 in the battery housing and the main body 11. The protection board 4 is inserted between the two protrusions 12, that is, the protection board 4 is inserted and fixed to the groove 13. This structure facilitates the installation and fixation of the protection board 4 using the groove 13, and also allows the protection board 4 to occupy the internal space of the groove 13, making the overall battery structure more compact and improving the space utilization rate of the battery in the corresponding electronic product.

[0050] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A battery housing, characterized by include: The housing (1) includes a main body (11) and a main receiving cavity (110) is formed therein. Two protrusions (12) extending outward toward the main receiving cavity (110) are formed on one side of the main body (11). The two protrusions (12) are spaced apart along a first direction. The lengths of the two protrusions (12) in the first direction are L1 and L2, respectively, and L1 ≠ L2. A secondary receiving cavity (120) communicating with the main receiving cavity (110) is formed in the protrusions (12). The pole (2) is provided on at least one of the protrusions (12), and the pole (2) is installed at one end of the protrusion (12) away from the main body (11).

2. The battery case of claim 1, wherein, The electrode post (2) is a positive electrode post, which is disposed on one of the protrusions (12), and the other protrusion (12) and the main body (11) together form the negative electrode of the battery.

3. The battery case of claim 2, wherein, It also includes a negative electrode adapter piece (5), wherein the positive electrode post and the negative electrode adapter piece (5) are respectively disposed at one end of the two protrusions (12) away from the main body (11).

4. The battery case of claim 1, wherein, There are two poles (2), one positive pole and one negative pole, which are respectively disposed on the two protrusions (12).

5. The battery case of claim 1, wherein, It also includes a first insulating element (3). The pole post (2) includes a connecting post (21) and adapter plates (22) disposed at both ends of the connecting post (21). The connecting post (21) passes through the protrusion (12). The two adapter plates (22) are located on the inner and outer sides of the protrusion (12) respectively. The pole post (2) and the protrusion (12) are insulated and isolated from each other by the first insulating element (3).

6. The battery case of claim 1, wherein, It also includes a second insulating component. The pole (2) includes a connecting post (21) and an adapter plate (22) disposed at one end of the connecting post. The connecting post (21) passes through the protrusion (12). The adapter plate (22) is located outside the protrusion (12). The pole (2) and the protrusion (12) are insulated and isolated from each other by the second insulating component.

7. The battery case of claim 1, wherein, The height of the protrusion (12) relative to the main body (11) is H, where H = 1.0 mm to 5.0 mm.

8. The battery case of claim 1, wherein, The two protrusions (12) are located at both ends of the main body (11) along the first direction.

9. The battery case according to any one of claims 1 to 8, wherein The housing (1) includes a surrounding plate (14) and two cover plates (15). The surrounding plate (14) forms the main receiving cavity (110) and the secondary receiving cavity (120). The two opposite ends of the surrounding plate (14) form open ends, and the two cover plates (15) respectively cover the two open ends.

10. The battery case according to any one of claims 1 to 8, wherein The housing (1) includes a main housing (16) and a cover plate (15). The main housing (16) forms the main receiving cavity (110) and the secondary receiving cavity (120). One end of the main housing (16) forms an open end, and the cover plate (15) covers the open end.

11. A battery, characterized by The battery includes an electrode assembly and a battery casing as described in any one of claims 1 to 10. The electrode assembly includes an electrode body and a positive tab and a negative tab disposed on the electrode body. The electrode body is housed in a main receiving cavity (110), and the positive tab and the negative tab are respectively housed in two secondary receiving cavities (120).

12. The battery of claim 11, wherein, It also includes a protective plate (4), which is inserted between two protrusions (12).

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