Battery, battery pack and electric equipment

Abstract

The utility model relates to a battery, a battery pack and electric equipment, the battery comprises: a housing, one end of which is provided with an opening; the battery cell assembly comprises a battery cell and a tab, and the tab is conductively connected with the battery cell; the shell cover assembly is arranged at the opening in a covering mode, and a cavity communicated with the interior of the shell is formed in the shell cover assembly; a cavity is formed in the shell, the shell cover assembly is arranged in the cavity, the insulating partition plate is arranged between the shell and the shell cover assembly and is provided with a penetrating opening, the tab extends into the cavity through the penetrating opening, and the insulating partition plate is used for isolating the shell cover assembly from the tab. Through the technical scheme, the battery provided by the utility model can avoid a short circuit condition.

Description

Technical Field

[0001] The present disclosure relates to the technical field of batteries, and in particular, to a battery, a battery pack, and an electrical device. Background Art

[0002] In the related art, in order to increase the size of the battery cell to further improve the energy density of the battery, a method of shortening the height of the tab and squeezing the tab into the cover plate space is generally adopted. The tab of the high energy density battery extends through the opening of the battery cover plate into the cover plate space, resulting in that during the installation or long-term use of the battery, the tab is likely to contact the case cover assembly to cause a short circuit, affecting the service life of the battery. Summary of the Utility Model

[0003] The purpose of the present disclosure is to provide a battery, a battery pack, and an electrical device, and the battery can avoid short circuit.

[0004] To achieve the above purpose, the present disclosure provides a battery, which includes: a housing with an opening at one end; a battery cell assembly including a battery cell and a tab, the tab being electrically connected to the battery cell; a case cover assembly covering the opening and forming a cavity communicating with the inside of the housing; and an insulating partition disposed between the housing and the case cover assembly and having a through-hole, the tab extending into the cavity through the through-hole, and the insulating partition being used to isolate the case cover assembly and the tab.

[0005] Optionally, the insulating partition includes a partition body and an extending flange, the partition body is provided with the through-hole, the extending flange is connected to the partition body, and the extending flange extends from the through-hole toward the cavity and is arranged at a preset angle with respect to the partition body.

[0006] Optionally, the preset angle is 25° - 135°.

[0007] Optionally, the extending flange has an end away from the partition body, and the distance between this end and the partition body in the direction perpendicular to the partition body is 1 mm - 30 mm.

[0008] Optionally, the number of the extending flanges is multiple and they are arranged in pairs, and the two extending flanges in a pair are respectively arranged on opposite sides of the through-hole.

[0009] Optionally, the partition body is connected to the case cover assembly, the partition body is provided with one of a buckle and a slot, and the case cover assembly is provided with the other of the buckle and the slot, and the buckle and the slot are engaged with each other.

[0010] Optionally, the shell cover assembly includes a cover plate and a cap. The cover plate is provided with a communication port, and the cap is disposed at the communication port and forms the cavity. The tab passes through the communication port and extends into the cavity.

[0011] Optionally, the cover plate is provided with a first through port, and the insulating partition is provided with a second through port. The first through port and the second through port are coaxially arranged and communicate with the interior of the outer shell to serve as a liquid injection port or an explosion-proof port.

[0012] Based on the above technical solutions, the present disclosure provides a battery pack including the above battery.

[0013] Based on the above technical solutions, the present disclosure provides an electrical device including the above battery or the above battery pack.

[0014] Through the above technical solutions, in the battery provided by the present disclosure, a shell cover assembly is disposed at the opening of the outer shell. The shell cover assembly forms a cavity communicating with the interior of the outer shell. The battery cell is disposed inside the outer shell. The tab is electrically connected to the battery cell and extends into the cavity through the opening. The insulating partition is isolated between the shell cover assembly and the tab and is provided with a through port for the tab to pass through. That is to say, when the tab extends out of the interior of the outer shell, it simultaneously passes through the through port and the opening. When the battery provided by the present disclosure is assembled, first, the battery cell is placed inside the outer shell, then the insulating partition is installed at one end of the outer shell provided with the opening. The tab is pulled out of the outer shell and passes through the through port and the opening. Finally, the shell cover assembly is installed. At this time, the tab extends into the cavity formed by the shell cover assembly. Thereby, the space occupied by the tab inside the outer shell can be reduced, and the energy density of the battery can be improved. Among them, the insulating partition isolates the shell cover assembly and the tab. In this way, during the process of the tab extending from the interior of the outer shell to the cavity, the insulating partition can prevent the shell cover assembly from scraping the tab and causing damage to the tab, which affects the service life of the battery. During the long-term use of the battery, the insulating partition can also prevent the tab from contacting the shell cover assembly and causing a short circuit.

[0015] Other features and advantages of the present disclosure will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. They are used together with the following specific implementation to explain the present disclosure, but do not constitute a limitation to the present disclosure. In the drawings:

[0017] Figure 1 is an exploded view of the battery provided by the embodiment of the present disclosure;

[0018] Figure 2 is a cross-sectional view of the battery provided by the first embodiment of the present disclosure;

[0019] Figure 3 It is a partial enlarged schematic view of location A provided by the first embodiment of the present disclosure;

[0020] Figure 4 It is a structural schematic view of the insulating partition provided by the first embodiment of the present disclosure;

[0021] Figure 5 It is a cross-sectional schematic view of the battery provided by the second embodiment of the present disclosure;

[0022] Figure 6 It is a partial enlarged schematic view of location B provided by the second embodiment of the present disclosure;

[0023] Figure 7 It is a structural schematic view of the insulating partition provided by the second embodiment of the present disclosure;

[0024] Figure 8 It is a cross-sectional schematic view of the battery provided by the third embodiment of the present disclosure;

[0025] Figure 9 It is a partial enlarged schematic view of location C provided by the third embodiment of the present disclosure;

[0026] Figure 10 It is a structural schematic view of the insulating partition provided by the third embodiment of the present disclosure.

[0027] Description of reference numerals

[0028] 1 - Outer shell; 11 - Opening; 2 - Battery cell assembly; 21 - Battery cell; 22 - Tab; 23 - Lead-out piece; 3 - Shell cover assembly; 31 - Cavity; 32 - Cover plate; 321 - First through hole; 322 - Communication port; 33 - Cap; 4 - Insulating partition; 41 - Through hole; 42 - Partition body; 421 - Card slot; 422 - Second through hole; 43 - Extension flange; 5 - Terminal post; α - Preset angle. Detailed description of the specific implementation manners

[0029] The following provides a detailed description of the specific implementation manners of the present disclosure with reference to the accompanying drawings. It should be understood that the specific implementation manners described herein are only used to illustrate and explain the present disclosure, and are not used to limit the present disclosure.

[0030] In the present disclosure, unless otherwise stated, the orientation terms such as "inside, outside" generally refer to "inside, outside" relative to the own contour of the corresponding component. The terms "first", "second", etc. used are to distinguish one element from another, and do not have sequence and importance. In addition, in the following description, when referring to the drawings, unless otherwise explained, the same reference numerals in different drawings represent the same or similar elements. The above definitions are only used to explain and illustrate the present disclosure, and should not be construed as a limitation to the present disclosure.

[0031] According to the specific embodiments provided by the present disclosure, with reference to Figures 1 to 10 as shown in Figures 1 to 10 , a battery is provided, which includes: a housing 1, one end of the housing 1 is provided with an opening 11; a battery cell assembly 2, the battery cell assembly 2 includes a battery cell 21 and a tab 22, and the tab 22 is electrically connected to the battery cell 21; a cover assembly 3, the cover assembly 3 is disposed at the opening 11 and forms a cavity 31 communicating with the interior of the housing 1; and an insulating partition 4, the insulating partition 4 is disposed between the housing 1 and the cover assembly 3 and is provided with a through hole 41, and the tab 22 extends into the cavity 31 through the through hole 41, and the insulating partition 4 is used to isolate the cover assembly 3 and the tab 22.

[0032] Through the above technical solution, in the battery provided by the present disclosure, a cover assembly 3 is disposed at the opening 11 of the housing 1, the cover assembly 3 forms a cavity 31 communicating with the interior of the housing 1, the battery cell 21 is disposed inside the housing 1, the tab 22 is electrically connected to the battery cell 21 and extends into the cavity 31 through the opening 11, the insulating partition 4 is isolated between the cover assembly 3 and the tab 22 and is provided with a through hole 41 for the tab 22 to pass through. That is to say, the tab 22 extends out of the housing 1 and passes through the through hole 41 and the opening 11 at the same time. When the battery provided by the present disclosure is assembled, first, the battery cell 21 is placed inside the housing 1, then the insulating partition 4 is installed at one end of the housing 1 provided with the opening 11, the tab 22 is pulled out of the housing 1 and passes through the through hole 41 and the opening 11, and finally the cover assembly 3 is installed. At this time, the tab 22 extends into the cavity 31 formed by the cover assembly 3, thereby reducing the space occupied by the tab 22 inside the housing 1, and further improving the energy density of the battery. Among them, the insulating partition 4 isolates the cover assembly 3 and the tab 22. In this way, during the process of the tab 22 extending out of the housing 1 and extending into the cavity 31, the insulating partition 4 can prevent the cover assembly 3 from scraping the tab 22 and causing damage to the tab 22, which affects the service life of the battery. During the long-term use of the battery, the insulating partition 4 can also prevent the situation of short circuit caused by the contact between the tab 22 and the cover assembly 3 due to poor welding of the tab 22.

[0033] In the battery provided by the present disclosure, the insulating partition 4 can be constructed in any suitable form, and the present disclosure does not make specific limitations thereon. As an exemplary embodiment, with reference to Figure 2As shown, the insulating partition 4 may include a partition main body 42 and an extending flange 43. The partition main body 42 may be provided with a through hole 41. The extending flange 43 may be connected to the partition main body 42, and the extending flange 43 extends from the through hole 41 toward the cavity 31 and is arranged at a preset angle α with respect to the partition main body 42. That is to say, the extending flange 43 is connected to the partition main body 42 and extends at a preset angle to insulate the housing cover assembly 3 and the tab 22. In this way, the insulating partition 4 can be fixed to the outer shell 1 through the partition main body 42, and insulation between the housing cover assembly 3 and the tab 22 can be achieved through the extending flange 43. In the present disclosure, the partition main body 42 is disposed on the side of the housing cover assembly 3 away from the cavity 31 and is in mutual contact with the cover plate 32 in the housing cover assembly 3. The extending flange 43 is connected to the partition main body 42 and extends through the opening 11 toward the cavity 31 to insulate between the tab 22 and the cover plate 32, so as to achieve insulation between the housing cover assembly 3 and the tab 22.

[0034] Wherein, the preset angle between the extending flange 43 and the partition main body 42 can be any suitable angle, and the present disclosure does not make specific limitations thereon. As an exemplary embodiment, referring to Figures 2 to 10 as shown, the preset included angle α can be 25° to 135°. In one embodiment, referring to Figures 2 to 4 as shown, when 25° ≤ α < 90°, that is, one end of the extending flange 43 is connected to the partition main body 42, and the other end extends toward the direction close to the tab 22. In this way, the partition main body 42 is in mutual contact with the cover plate 32, and the extending flange 43 extends toward the cavity 31 through the communication port 322 provided on the cover plate 32 and is in a converging state relative to both sides of the communication port 322, which can play a certain clamping role on the part of the tab 22 passing through the communication port 322, and can also provide a certain supporting force for the tab 22 to prevent the tab 22 from being bent during long-term use and then coming into contact with the housing cover assembly 3 to cause a short circuit. In another embodiment, referring to Figures 5 to 10 as shown, when 90° ≤ α ≤ 135°, that is, one end of the extending flange 43 is connected to the partition main body 42, and the other end extends toward the direction away from the tab 22. In this way, the partition main body 42 is in mutual contact with the cover plate 32, and the extending flange 43 extends toward the cavity 31 through the communication port 322 provided on the cover plate 32 and is in a spreading state relative to both sides of the communication port 322, which can play a certain limiting role in the installation of the insulating partition 4. During installation, an external force can be applied to the extending flange 43 to appropriately squeeze it to facilitate the extending flange 43 to pass through the communication port 322, and then the external force is removed so that the extending flange 43 returns to its original position and abuts against the side wall of the communication port 322 to achieve the limitation of the position of the insulating partition 4.

[0035] The extension flange 43 can be configured to any suitable size according to different actual conditions, and the present disclosure does not impose specific restrictions on this. As an exemplary embodiment, the extension flange 43 has an end away from the partition body 42, and the distance between the end and the partition body 42 in a direction perpendicular to the partition body 42 can be 1mm~30mm. The specific size can be designed according to the thickness of the cover plate 32 in the shell cover assembly 3 to ensure that the extension flange 43 is completely isolated between the shell cover assembly 3 and the pole ear 22.

[0036] In the battery provided by the present disclosure, the extension flange 43 can be constructed in any suitable number, and the present disclosure does not impose any specific restrictions on this. As an exemplary embodiment, referring to FIG. 4, the number of the extension flanges 43 can be multiple and arranged in pairs, and the two pairs of extension flanges 43 can be arranged on opposite sides of the through-port 41. Generally, the pole ear 22 is constructed in multiple layers and has a certain thickness. After the pole ear 22 is bent, it is easy for the pole ear 22 to spread out or bend excessively to both sides, thereby causing the pole ear 22 to contact with the shell cover assembly 3 to cause a short circuit, affecting the service life of the battery. In the present disclosure, the extension flange 43 is arranged on both sides of the through-port 41 in the length direction, that is, on both sides of the length direction of the pole ear 22. In this way, when the pole ear 22 is scattered or excessively bent, it first contacts with the extension flange 43, so as to avoid contact between the pole ear 22 and the shell cover assembly 3 as much as possible, thereby improving the safety performance of the battery.

[0037] In some other embodiments, the extension flanges 43 may also be provided in two pairs, and four extension flanges 43 are arranged around the periphery of the through opening 41 to fully avoid contact between the tab 22 and the shell cover assembly 3. Figure 8 and Figure 10 As shown in , the preset angle α is 90°, that is, the extended flange 43 is arranged perpendicular to the partition body 42, and any two adjacent extended flanges 43 are interconnected to form a rectangular frame arranged around the through opening 41, which can also avoid contact between the pole ear 22 and the shell cover assembly 3.

[0038] It should be noted here that the setting of multiple pairs of extension flanges 43 does not affect the setting of the preset angle between the extension flange 43 and the partition body 42. Specifically, when 25°≤α<90°, multiple extension flanges 43 can be arranged around a trapezoidal platform that is narrow at the top and wide at the bottom, which can also achieve the limitation and support of the pole ear 22; when 90°<α≤135°, multiple extension flanges 43 can be arranged around a trapezoidal platform that is wide at the top and narrow at the bottom, which can also achieve the limitation of its own installation position.

[0039] In the battery provided in the present disclosure, the insulating separator 4 can be fixed by any suitable method, and the present disclosure does not impose any specific limitation on this.Figure 4 As shown, the partition body 42 can be connected to the shell cover assembly 3. The partition body 42 can be provided with one of a buckle and a clamping groove 421, and the shell cover assembly 3 can be provided with the other of the buckle and the clamping groove 421. The buckle and the clamping groove 421 are engaged with each other. During installation, first, the extending flange 43 is passed through the opening 11 and extends into the cavity 31. Then, the positions of the partition body 42 and the shell cover assembly 3 where the buckle and the clamping groove 421 are respectively provided are aligned, and the partition body 42 and the shell cover assembly 3 are pressed to fix them to each other.

[0040] In some other embodiments, the insulating partition 4 can also be detachably fixed to the shell cover assembly 3 by fasteners. Specifically, the partition body 42 and the shell cover assembly 3 can be correspondingly provided with mounting holes, and the fasteners pass through the mounting holes and are fixed to fix the insulating partition 4 and the shell cover assembly 3. The present disclosure does not make specific limitations thereto.

[0041] In the battery provided by the present disclosure, as an exemplary embodiment, refer to Figure 1 As shown, the battery can further include a pole column 5. The battery cell assembly 2 can further include a lead-out piece 23. The lead-out piece 23 can be electrically connected to the tab 22. The cover plate 32 can be provided with a first through hole 321, and the insulating partition 4 can be provided with a second through hole 422. The pole column 5 passes through the first through hole 321 and the second through hole 422 and is electrically connected to the lead-out piece 23. In this way, the pole column 5 passing through the first through hole 321 and the second through hole 422 can achieve its own fixation on the one hand, and on the other hand, the provision of the first through hole 321 and the second through hole 422 can also avoid interfering with the electrical connection between the pole column 5 and the lead-out piece 23. Since the lead-out piece 23 is electrically connected to the tab 22, the pole column 5 can achieve electrical connection with the tab 22, that is, the battery cell 21.

[0042] In the battery provided by the present disclosure, the cavity 31 can be constructed on the shell cover assembly 3 in any suitable form, and the present disclosure does not make specific limitations thereto. As an exemplary embodiment, refer to Figure 1 and Figure 2 As shown, the shell cover assembly 3 can further include a cap 33. The cover plate 32 can be provided with a communication port 322. The cap 33 can be covered at the communication port 322 and form a cavity 31. The tab 22 passes through the communication port 322 and extends into the cavity 31. In this way, the cavity 31 provides a receiving space for the tab 22 to reduce the space required for the tab 22 in the outer shell 1. Correspondingly, the size of the battery cell 21 in the outer shell 1 can be appropriately increased to achieve the purpose of improving the energy density of the battery.

[0043] In some other embodiments, the cap 33 can also be not provided. Instead, the cover plate 32 is constructed as a plate shape, and a part of the cover plate 32 is recessed away from the tab 22 to form a cavity 31, which can also provide a receiving space for the tab 22. The present disclosure does not make specific limitations thereto.

[0044] Among them, the cover plate 32 and the cap 33 can be fixed together in any suitable form, such as welding, snap connection, and connection by fasteners, etc. The present disclosure does not make specific limitations thereto. In addition, the cover plate 32 and the housing 1 can also be fixed together in any suitable form, such as welding, snap connection, and connection by fasteners, etc. The present disclosure also does not make specific limitations thereto.

[0045] In the battery provided by the present disclosure, as an exemplary embodiment, the cover plate 32 can be provided with a first through port, and the insulating partition 4 can be provided with a second through port. The first through port and the second through port can be coaxially arranged and communicate with the inside of the housing 1 to be used as a liquid injection port or an explosion-proof port. Among them, the liquid injection port is used for replenishing the electrolyte, so as to ensure that there are enough ions in the battery to migrate between the positive and negative electrodes during the charge and discharge process, realizing a reversible cycle. An explosion-proof valve is usually installed on the explosion-proof port. When the gas pressure generated inside the battery during the charge and discharge process exceeds a preset safety value, the explosion-proof valve will automatically open to release the gas accumulated inside, thereby reducing the pressure and preventing the battery from bursting or exploding, improving the safety of the battery.

[0046] Based on the above technical solution, the present disclosure provides a battery pack, including the above battery. This battery has all the technical features of the above battery, so it will not be elaborated here.

[0047] Based on the above technical solution, the present disclosure provides an electrical device, including the above battery or the above battery pack. This battery has all the technical features of the above battery, and this battery pack has all the technical features of the above battery pack, so it will not be elaborated here.

[0048] The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0049] In addition, it should be noted that, among the various specific technical features described in the above specific embodiments, they can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present disclosure will not separately describe various possible combination methods.

[0050] In addition, any combination can be made between various different embodiments of the present disclosure as long as it does not violate the idea of the present disclosure, and it should also be regarded as the content disclosed by the present disclosure.

Claims

1. A battery, characterized in that: The battery comprises: A housing, one end of which is provided with an opening; A battery cell assembly, the battery cell assembly comprising a battery cell and a tab, the tab being conductively connected to the battery cell; a shell cover assembly, the shell cover assembly being disposed at the opening and forming a cavity communicating with the interior of the housing; and An insulating partition is arranged between the shell and the shell cover assembly and is provided with a through opening, through which the pole ear extends into the cavity, and the insulating partition is used to isolate the shell cover assembly and the pole ear.

2. The battery according to claim 1, characterized in that The insulating partition includes a partition body and an extension flange, the partition body is provided with the through opening, the extension flange is connected to the partition body, and the extension flange extends from the through opening toward the cavity and is arranged at a preset angle with the partition body.

3. The battery according to claim 2, characterized in that The preset angle is 25°~135°.

4. The battery according to claim 2, characterized in that The extended flange has an end portion away from the partition body, and a distance between the end portion and the partition body in a direction perpendicular to the partition body is 1 mm to 30 mm.

5. The battery according to claim 2, characterized in that The extension flanges are multiple in number and are arranged in pairs, and the two extension flanges in a pair are respectively arranged on two opposite sides of the through opening.

6. The battery according to claim 2, characterized in that The partition body is connected to the shell cover assembly, the partition body is provided with one of a buckle and a slot, the shell cover assembly is provided with the other of the buckle and the slot, and the buckle and the slot are engaged with each other.

7. The battery according to claim 2, characterized in that The shell cover assembly comprises a cover plate and a cover cap, wherein the cover plate is provided with a communication port, the cover cap is arranged at the communication port and forms the cavity, and the tab passes through the communication port and extends into the cavity.

8. The battery according to claim 7, characterized in that The cover plate is provided with a first opening, and the insulating partition is provided with a second opening. The first opening and the second opening are coaxially arranged and communicate with the interior of the shell to be used as a liquid injection port or an explosion-proof port.

9. A battery pack, characterized in that: Comprising a battery according to any one of claims 1-8.

10. An electrical device, characterized in that: The invention comprises a battery according to any one of claims 1 to 8 or a battery pack according to claim 9.

Images