Battery and vehicle

Abstract

The utility model provides a battery and a vehicle, and relates to the technical field of batteries, the battery comprises a shell, a first cover plate, a pole core and a binding piece, the first cover plate is mounted at one end of the shell, and an anti-explosion valve is mounted on the first cover plate; the pole core and the binding piece are both installed in the shell, and the binding piece is connected with the pole core and the shell so as to limit the pole core to move towards the first cover plate relative to the shell. When the pole core has an abnormal condition and generates heat and gas, after the anti-explosion valve on the first cover plate is broken, the pole core is limited by the binding piece, so that high-pressure gas cannot drive the pole core to move towards the first cover plate, an exhaust hole formed after the anti-explosion valve is broken cannot be blocked by the pole core, the high-pressure and high-heat gas can be discharged from the shell in time, and the service life of the shell is prolonged. And battery high-voltage explosion is avoided.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and more specifically, to a battery and a vehicle. Background Technology

[0002] Abnormal use of lithium-ion batteries (such as short circuits, overcharging, or over-discharging) can cause internal heat and gas generation, which may lead to thermal runaway. Therefore, an explosion-proof valve is installed on the battery cover to release pressure and prevent the battery from exploding due to high pressure caused by thermal runaway.

[0003] However, in actual use, the high-pressure gas generated inside the battery casing can cause the battery core to rush towards the explosion-proof valve, blocking the vent hole formed after the explosion-proof valve explodes. This prevents timely venting, causing heat and gas to accumulate inside the casing, leading to a high-pressure explosion of the battery. Utility Model Content

[0004] The problem this invention aims to solve is that the battery core, driven by high-pressure gas, blocks the vent hole formed by the explosion-proof valve, causing heat and gas to accumulate inside the casing, which can lead to a high-pressure explosion of the battery.

[0005] To address the aforementioned problems, in a first aspect, this utility model provides a battery, comprising a casing, a first cover plate, an electrode core, and a restraining member;

[0006] The first cover plate is installed at one end of the housing, and an explosion-proof valve is installed on the first cover plate; the pole core and the restraint member are both installed inside the housing, and the restraint member is connected to the pole core and the housing respectively to restrict the pole core from moving toward the first cover plate relative to the housing.

[0007] Optionally, the housing includes a housing body and a second cover plate. The housing body is a hollow cavity with openings at both ends. The second cover plate and the first cover plate are respectively installed at both ends of the housing body. The restraining member is connected to the second cover plate.

[0008] Optionally, the restraint member includes a cover and a connecting part. The cover is placed over the pole core, and the connecting part is connected to one end of the cover near the second cover plate and connected to the second cover plate.

[0009] Optionally, the second cover plate has an insulating member on the side near the restraint member, and the insulating member has a through hole. The free end of the connecting part passes through the through hole and is used to be bonded to the connecting part or the cover.

[0010] Optionally, the portion of the insulating member surrounded by the connecting portion is provided with reinforcing ribs.

[0011] Optionally, the restraint member further includes a first covering portion, wherein the cover body has a first opening at one end near the second cover plate, and the connecting portion and the first covering portion are respectively connected to two opposite edges of the first opening. The first covering portion is used to cover the first opening after folding and is adhered to the connecting portion.

[0012] Optionally, an electrode post is installed on the second cover plate, and a first passage hole is provided on the first cover portion. The electrode tab of the electrode core near one end of the second cover plate passes through the first passage hole and contacts the electrode post.

[0013] Optionally, an electrode post is installed on the first cover plate, and a second passage hole is opened on the side wall of the cover body near the first cover plate. The electrode tab of the electrode core near the end of the first cover plate passes through the second passage hole and contacts the electrode post on the first cover plate.

[0014] Optionally, the restraint member further includes a second covering portion, and the cover body is provided with a second opening. The second opening and the first opening are respectively located on two adjacent sides of the cover body. The second covering portion is connected to the cover body and is used to cover the second opening.

[0015] Secondly, this utility model provides a vehicle including the battery described above.

[0016] The beneficial effects of this utility model's battery and vehicle are:

[0017] Both the electrode core and the restraint component are installed inside the housing. The restraint component connects the electrode core to the housing, restricting the electrode core from moving towards the location of the first cover plate. The explosion-proof valve is installed on the first cover plate. Therefore, when the electrode core malfunctions and generates heat and gas, the explosion-proof valve on the first cover plate will rupture. Because the electrode core is restricted by the restraint component, the high-pressure gas cannot drive the electrode core towards the first cover plate. Thus, the vent hole formed after the explosion-proof valve ruptures will not be blocked by the electrode core, and the high-pressure, high-heat gas can be discharged from the housing in time, preventing the battery from exploding under high pressure. Attached Figure Description

[0018] Figure 1 A schematic diagram of the structure of a battery provided in an embodiment of this utility model;

[0019] Figure 2 A schematic diagram of the structure of a restraint member provided in an embodiment of this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the second cover plate provided in an embodiment of the present utility model;

[0021] Figure 4 This is a schematic diagram of the installation of a connecting part provided in an embodiment of the present utility model;

[0022] Figure 5 This is a schematic diagram illustrating the installation of another connecting part provided in an embodiment of the present utility model;

[0023] Figure 6 This is a schematic diagram of the installation of another connection part provided in an embodiment of the present utility model;

[0024] Figure 7 This is a schematic diagram of another restraint component provided in an embodiment of the present utility model.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Pole core; 2. Restraining component; 3. Second cover plate; 4. Housing; 5. First cover plate; 6. Connecting part; 7. First covering part; 8. First passage hole; 9. First opening; 10. Second opening; 11. Third covering part; 12. Fourth covering part; 13. First perforation; 14. Second perforation; 15. Insulating component; 16. Adhesive joint; 17. Pole post; 18. Second passage hole; 19. Shell body; 20. Cover body; 21. Reinforcing rib. Detailed Implementation

[0027] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Although some embodiments of this utility model are shown in the drawings, it should be understood that this utility model can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this utility model. It should be understood that the drawings and embodiments of this utility model are for illustrative purposes only and are not intended to limit the scope of protection of this utility model.

[0028] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; and the term "optionally" means "optional embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first," "second," etc., mentioned in this utility model are only used to distinguish different devices, modules, or units, and are not used to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0029] It should be noted that the terms "one" and "multiple" used in this utility model are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0030] In related technologies, explosion-proof valves are usually installed on the surface of the lithium-ion battery cover, and a filter device is installed inside the battery. When the explosion-proof valve opens, the filter device filters dust or debris in the hot gas to prevent the vent hole formed after the explosion-proof valve explodes from being blocked. However, after the electrode core moves due to the gas, it will block the filter hole in the filter device, causing the hot gas to be unable to pass through the filter device to reach the vent hole, which will still cause the battery to explode under high pressure. This does not fundamentally solve the problem.

[0031] To address the problems existing in the aforementioned related technologies, this embodiment provides a battery and a vehicle.

[0032] like Figure 1 As shown, an embodiment of the present invention provides a battery including a casing 4, a first cover plate 5, an electrode core 1, and a restraining member 2;

[0033] The first cover plate 5 is installed at one end of the housing 4, and an explosion-proof valve is installed on the first cover plate 5; the pole core 1 and the restraining member 2 are both installed inside the housing 4, and the restraining member 2 is connected to the pole core 1 and the housing 4 respectively, so as to restrict the pole core 1 from moving toward the first cover plate 5 relative to the housing 4.

[0034] For example, such as Figure 1 As shown, the restraint member 2 can be designed as a hollow cuboid shell with multiple small holes, or the restraint member 2 can be designed as a cuboid-shaped frame. The pole core 1 is placed inside the restraint member 2. An opening can be provided on the restraint member 2, and the pole core 1 is inserted into the restraint member 2 through the opening. Then, the opening is sealed, confining the pole core 1 within the restraint member 2, allowing the pole core 1 and the restraint member 2 to move as a whole. The restraint member 2 containing the pole core 1 is then installed inside the housing 4, and one end of the restraint member 2 is fixedly connected to the housing 4. For example, one end of the restraint member 2 can be glued to the housing 4, or one end of the restraint member 2 can be fastened to the housing 4 with screws, or one end of the restraint member 2 can be clamped to the housing 4 with a fixing clip, etc.; the restraint member 2 can also be a restraint strap, which restrains the electrode core 1 and is fixedly connected to the housing 4, so that there is no relative movement between the electrode core 1 and the housing 4, and restricts the electrode core 1 from rushing towards the first cover plate 5 under the drive of high pressure gas. Since the explosion-proof valve is installed on the first cover plate 5, the electrode core 1 is prevented from blocking the exhaust hole formed after the explosion-proof valve explodes.

[0035] In this embodiment, both the electrode core 1 and the restraint member 2 are installed inside the housing 4, and the restraint member 2 connects the electrode core 1 to the housing 4, restricting the electrode core 1 from moving to the location of the first cover plate 5. The explosion-proof valve is installed on the first cover plate 5. Therefore, when the electrode core 1 experiences an abnormal condition and generates heat and gas, the explosion-proof valve on the first cover plate 5 will break. Since the electrode core 1 is restricted by the restraint member 2, the high-pressure gas cannot drive the electrode core 1 to move towards the first cover plate 5. Therefore, the exhaust hole formed after the explosion-proof valve breaks will not be blocked by the electrode core 1, and the high-pressure and high-heat gas can be discharged from the housing 4 in time, avoiding the high-pressure explosion of the battery.

[0036] Optionally, such as Figure 1 As shown, the shell 4 includes a shell body 19 and a second cover plate 3. The shell body 19 is a hollow cavity with openings at both ends. The second cover plate 3 and the first cover plate 5 are respectively installed at both ends of the shell body 19. The restraining member 2 is connected to the second cover plate 3.

[0037] Specifically, in Figure 1 In this embodiment, the shell body 19 and the second cover plate 3 are independent structural components. After assembly, they form the shell 4, with the second cover plate 3 installed at the end of the shell body 19 away from the first cover plate 5. Alternatively, the shell 4 can be designed as an integrated structure, i.e., the shell 4 is only a shell with an opening at one end, with the first cover plate 5 installed at the open end. In this embodiment, the restraining member 2 is connected to the second cover plate 3, and the restraining member 2 is also connected to the electrode core 1. Thus, the electrode core 1 is connected to the second cover plate 3 through the restraining member 2, which restricts the displacement of the electrode core 1 and effectively prevents the electrode core 1 from moving towards the first cover plate 5. In addition, since the shell body 19 has openings at both ends, it is convenient to install the electrode core 1 and the restraining member 2 into the shell body 19, then connect the restraining member 2 to the second cover plate 3, and then install the second cover plate 3 at the opening of the shell body 19, which facilitates battery assembly.

[0038] Optionally, such as Figure 2 As shown, the restraint member 2 includes a cover 20 and a connecting part 6. The cover 20 covers the outside of the pole core 1, and the connecting part 6 is connected to one end of the cover 20 near the second cover plate 3 and connected to the second cover plate 3.

[0039] Specifically, in combination Figure 1 and Figure 2The materials for the cover 20 and the connecting part 6 can be insulating materials, such as PI (Polyimide) or PAI (Polyamide-imide), which are heat-resistant and have high mechanical strength. The cover 20 and the connecting part 6 can be an integral structure. Covering the electrode core 1 with the cover 20 ensures that most of the area between the electrode core 1 and the housing 4 and the first cover plate 5 is insulated, reducing the probability of short circuits and the risk of leakage from the electrode core 1. The connecting part 6 extends from the end of the cover 20. It can be fixed to the second cover plate 3 with screws or directly glued to the second cover plate 3, thus fixing one end of the restraining member 2 to the second cover plate 3. This prevents the electrode core 1 restrained by the restraining member 2 from moving within the housing 4 and avoids the electrode core 1 inside the restraining member 2 blocking the vent hole formed by the explosion-proof valve on the first cover plate 5. The connecting part 6 is provided to facilitate the connection between the restraint member 2 and the second cover plate 3. At this time, it is only necessary to fix the connecting part 6 on the second cover plate 3 without damaging the integrity of the cover body 20, making the installation convenient.

[0040] Optionally, such as Figure 1 and Figure 3 As shown, the second cover plate 3 has an insulating member 15 on the side near the restraint member 2. The insulating member 15 has a through hole, and the free end of the connecting part 6 passes through the through hole for bonding to the connecting part 6 or the cover 20.

[0041] Specifically, the insulating component 15 can be made of insulating materials such as plastic, and it is located on the side of the second cover plate 3 facing the inside of the battery, which can also be called the lower plastic component. The shape of the insulating component 15 can be designed as follows: Figure 3 The frame structure shown; the connecting part 6 can be designed as follows Figure 2 The sheet shape shown can also be designed as a strip or band, such as a connecting rope or connecting strap. An insulating element 15 is installed on the second cover plate 3, partly to prevent leakage of current from the electrode core 1 through the second cover plate 3, and partly to provide installation space for the connecting part 6.

[0042] like Figure 3 and Figure 4 As shown, the free end of the connecting part 6 is the end of the connecting part 6 away from the cover 20, and the insulating member 15 may have a first through hole 13, such as Figure 4 As shown, the free end of the connecting part 6 can enter the first through hole 13 from the left side and exit from the right side of the first through hole 13, and then be bonded to the connecting part 6 or the cover 20; as Figure 5As shown, the free end of the connecting part 6 can enter the first through hole 13 from the right side and exit from the left side of the first through hole 13, and then be bonded to the connecting part 6 or the cover 20; or, the insulating member 15 can have two through holes, the first through hole 13 and the second through hole 14, on the edge near the connecting part 6, as shown. Figure 3 and Figure 6 As shown, the free end of the connecting part 6 passes through the first through hole 13 from the inside of the frame of the insulating member 15 to the outside of the frame, and then enters the inside of the frame of the insulating member 15 through the second through hole 14, and is bonded to the connecting part 6 or the cover 20. Furthermore, the length of the first through hole 13 and the length of the second through hole 14 are slightly greater than the width of the connecting part 6, and the width of the first through hole 13 and the width of the second through hole 14 are greater than the thickness of the connecting part 6, so that the free end of the connecting part 6 can smoothly pass through the first through hole 13 and the second through hole 14. During installation, the free end of the connecting part 6 is glued to the connecting part 6 or to the cover 20, as shown. Figures 4-6 The adhesive joint 16 shown makes the structure of the connecting part 6 surrounding part of the insulating member 15 (hereinafter referred to as the partition), that is, the connecting part 6 is wrapped around the partition, so that the cover 20 connected to the connecting part 6 cannot move at will. By adopting this fixing method, the connecting part 6 can be fixed to the insulating member 15 in a relatively simple way, avoiding the introduction of other parts and controlling manufacturing costs.

[0043] Optionally, the portion of the insulating member 15 surrounded by the connecting portion 6 is provided with a reinforcing rib 21, that is, the partition is provided with a reinforcing rib 21, which is used to enhance the strength of the partition.

[0044] Specifically, such as Figures 4-6 As shown, the partition, as the load-bearing part of the connecting part 6, needs to have high strength. For example, a reinforcing rib 21 can be added to the inner side of the partition between the first perforation 13 and the second perforation 14 (i.e., the side facing the inside of the frame of the insulating member 15). The reinforcing rib 21 can be made of a high-strength material to enhance the strength of the partition and prevent the partition from breaking under stress.

[0045] Optionally, the restraint member 2 further includes a first covering part 7. The cover body 20 is provided with a first opening 9 at one end near the second cover plate 3. The connecting part 6 and the first covering part 7 are respectively connected to two opposite edges of the first opening 9. The first covering part 7 is used to cover the first opening 9 after folding and is adhered to the connecting part 6.

[0046] Specifically, such as Figure 2As shown, a first opening 9 is formed at one end of the cover 20, allowing the electrode core 1 to be installed into the cover 20 through the first opening 9. To confine the electrode core 1 within the cover 20, a first covering portion 7 is added at the edge of the first opening 9. The first covering portion 7 is positioned opposite to the connecting portion 6, folded towards the connecting portion 6, and adhered to the connecting portion 6, thereby sealing the first opening 9 and preventing the electrode core 1 from moving out of the first opening 9, thus making the electrode core 1 and the cover 20 form a single unit. It should be noted that the cover 20 can be as follows: Figure 2 The hollow cuboid structure shown can also be as follows: Figure 7 The frame-type cuboid structure shown has a grid-like design on the larger side surface of the restraint member 2, which allows the heat and gas released when the core 1 fails to be released from the cover 20 in a timely manner and released between the shell 4 and the restraint member 2.

[0047] Optionally, such as Figure 2 As shown, a pole post 17 is installed on the second cover plate 3, and a first passage hole 8 is provided on the first cover part 7. The pole tab of the pole core 1 near the end of the second cover plate 3 passes through the first passage hole 8 and contacts the pole post 17.

[0048] Specifically, the first cover 7 is made of insulating material, and a first passage hole 8 is provided on the first cover 7 for the tab to pass through only, which isolates other positions of the electrode core 1 from contact with the electrode post 17 in the second cover plate 3, allowing only the tab to contact the electrode post 17, reducing the probability of failure, and not affecting the normal operation of the battery.

[0049] Optionally, such as Figure 1 As shown, a pole post is installed on the first cover plate 5, such as... Figure 7 As shown, a second passage hole 18 is provided on the side wall of the cover 20 near the first cover plate 5, and the electrode tab of the electrode core 1 near the end of the first cover plate 5 passes through the second passage hole 18 and contacts the electrode post on the first cover plate 5.

[0050] Specifically, the entire restraint component 2 can be made of insulating material and can be a one-piece structure. A second passage hole 18 is opened on the cover 20 for the tab on the end of the electrode core 1 near the first cover plate 5 to pass through. The tab contacts the terminal post on the first cover plate 5, so that the tabs at both ends of the electrode core 1 contact the terminal post on the second cover plate 3 and the terminal post on the first cover plate 5 respectively, which can smoothly draw out the electrical energy in the electrode core 1 without affecting the normal operation of the battery. Moreover, due to the shielding of the cover 20, other parts of the electrode core 1 do not contact the terminal post on the second cover plate 3 and the first cover plate 5, reducing the risk of short circuit or other failures in the electrode core 1.

[0051] Optionally, such as Figure 2As shown, the restraint member 2 also includes a second covering part. The cover body 20 is provided with a second opening 10. The second opening 10 and the first opening 9 are respectively located on two adjacent sides of the cover body 20. The second covering part is connected to the cover body 20 and is used to cover the second opening 10.

[0052] Specifically, such as Figure 2 As shown, a second opening 10 can be opened on the cover 20 based on the first opening 9. The first opening 9 and the second opening 10 are adjacent and connected. The addition of the second opening 10 makes it easier to place the pole core 1 inside the cover 20. However, a second cover needs to be installed on the cover 20 so that after the pole core 1 is installed in the restraint member 2, the second cover can block the second opening 10 and prevent the pole core 1 from moving out of the second opening 10. It should be noted that the second covering part can be a single covering part (e.g., a third covering part 11 or a fourth covering part 12). This covering part is installed on one side of the second opening 10, and the area of ​​the covering part is greater than or equal to the area of ​​the second opening 10. Then, the second opening 10 is completely covered by folding the covering part, and the covered part is fixed on the other side of the second opening 10 after folding. In addition, the covering part can also include a third covering part 11 and a fourth covering part 12. The third covering part 11 and the fourth covering part 12 are respectively installed at two opposite edges of the second opening 10. The third covering part 11 and the fourth covering part 12 are folded towards each other and fixed to each other. The sum of the area of ​​the third covering part 11 and the area of ​​the fourth covering part 12 is greater than or equal to the area of ​​the second opening, thus blocking the second opening 10 and preventing the electrode core 1 from moving out of the second opening 10.

[0053] This utility model provides a vehicle that includes the battery described above.

[0054] In this embodiment, the beneficial effects of the vehicle are the same as those of the battery described above, and will not be repeated here.

[0055] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A battery, characterized in that, It includes a housing (4), a first cover plate (5), an electrode core (1), and a restraint member (2); The first cover plate (5) is installed at one end of the housing (4), and an explosion-proof valve is installed on the first cover plate (5); the pole core (1) and the restraint member (2) are both installed inside the housing (4), and the restraint member (2) is connected to the pole core (1) and the housing (4) respectively, so as to restrict the pole core (1) from moving toward the first cover plate (5) relative to the housing (4).

2. The battery according to claim 1, characterized in that, The shell (4) includes a shell body (19) and a second cover plate (3). The shell body (19) is a hollow cavity with openings at both ends. The second cover plate (3) and the first cover plate (5) are respectively installed at both ends of the shell body (19). The restraint member (2) is connected to the second cover plate (3).

3. The battery according to claim 2, characterized in that, The restraint member (2) includes a cover (20) and a connecting part (6). The cover (20) covers the outside of the pole core (1). The connecting part (6) is connected to one end of the cover (20) near the second cover plate (3) and is connected to the second cover plate (3).

4. The battery according to claim 3, characterized in that, The second cover plate (3) has an insulating member (15) on the side near the restraint member (2). The insulating member (15) has a through hole, and the free end of the connecting part (6) passes through the through hole for bonding to the connecting part (6) or the cover (20).

5. The battery according to claim 4, characterized in that, The insulating member (15) is provided with reinforcing ribs at the portion surrounded by the connecting part (6).

6. The battery according to claim 3, characterized in that, The restraint member (2) also includes a first covering part (7). The cover body (20) has a first opening (9) at one end near the second cover plate (3). The connecting part (6) and the first covering part (7) are respectively connected to two opposite edges of the first opening (9). The first covering part (7) is used to cover the first opening (9) after folding and is attached to the connecting part (6).

7. The battery according to claim 6, characterized in that, The second cover plate (3) is equipped with an electrode post (17), and the first cover part (7) is provided with a first passage hole (8). The electrode tab of the electrode core (1) near the second cover plate (3) passes through the first passage hole (8) and contacts the electrode post (17).

8. The battery according to claim 3, characterized in that, An electrode post is installed on the first cover plate (5). A second passage hole (18) is opened on the side wall of the cover body (20) near the first cover plate (5). The electrode tab of the electrode core (1) near the first cover plate (5) passes through the second passage hole (18) and contacts the electrode post on the first cover plate (5).

9. The battery according to claim 6, characterized in that, The restraint member (2) further includes a second covering part. The cover body (20) is provided with a second opening (10). The second opening (10) and the first opening (9) are respectively located on two adjacent sides of the cover body (20). The second covering part is connected to the cover body (20) and is used to cover the second opening (10).

10. A vehicle, characterized in that, Includes the battery as described in any one of claims 1-9.

Images