Battery and electric equipment

Abstract

The utility model relates to a battery and electric equipment. The battery comprises a shell, the battery cell assembly is positioned in the shell; an adapter sheet; the top cover assembly is arranged at the opening of the shell, the top cover assembly comprises a cover plate, a pole and an insulating component, the pole is arranged on the cover plate, the insulating component is connected with the cover plate, the pole is connected with the switching piece, and a pole welding area is arranged at the position, connected with the pole, of the switching piece; the insulating component comprises a first insulating part and a second insulating part, the second insulating part is rotationally connected with the first insulating part, a hollow area is arranged on the second insulating part, and the hollow area and the projection of the pole welding area in the height direction of the battery are at least partially overlapped. According to the utility model, the insulation component can be prevented from being molten due to high temperature, so that the molten fragments are prevented from falling to the battery core assembly to cause fire, the safety problems such as short-circuit fire and the like of the battery are effectively avoided, and the qualification rate in battery production can be improved, so that the scrap ratio of the battery is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, in particular to a battery and an electrical device. Background Art

[0002] At present, as a new type of battery, power batteries have broad application prospects in various fields such as power tools, portable appliances, and new energy vehicles. Compared with traditional batteries, they have many advantages such as high energy density, small size, light weight, and long cycle life. In the production process of power batteries, the insulating plate of the top cover assembly is often fixed by buckling and covering the cover. The existing insulating plate is usually designed with an insulating plate body and a wing structure, and is buckled and fixed to the insulating plate body after the wing structure is folded. For batteries with higher capacity requirements, the entire battery also has higher requirements for overcurrent temperature rise. When laser welding the pole, the heat of the adapter and the pole is more concentrated, which will cause the temperature to be higher.

[0003] The shortcoming of the existing structure is that a sharp increase in temperature will cause the insulating plate to melt, causing fragments of the melted insulating plate to fall into the battery cell, causing the diaphragm or electrode to catch fire, and then causing the battery to short-circuit, causing many safety problems and increasing the proportion of scrapped batteries. Utility Model Content

[0004] To this end, the technical problem to be solved by the utility model is to overcome the deficiencies in the prior art and provide a battery and electrical equipment that can prevent the insulating plate from melting due to high temperature, thereby avoiding the risk of battery cell fire, improving the safety performance of the battery, and at the same time improving the product qualification rate.

[0005] In order to solve the above technical problems, the utility model provides a battery, comprising:

[0006] case;

[0007] A battery cell assembly, which is located in the housing;

[0008] Adapter;

[0009] A top cover assembly is arranged at the opening of the shell, and the top cover assembly includes a cover plate, a pole and an insulating component. The pole is arranged on the cover plate, the insulating component is connected to the cover plate, and the pole is connected to the adapter plate. The connection between the adapter plate and the pole is a pole welding area; the insulating component includes a first insulating member and a second insulating member, the second insulating member is rotatably connected to the first insulating member, and a hollow area is provided on the second insulating member. When the second insulating member is rotated to be opposite to the first insulating member, at least part of the adapter plate is located between the first insulating member and the second insulating member, the hollow area is opposite to the pole welding area, and the hollow area and the projection of the pole welding area along the height direction of the battery at least partially overlap.

[0010] In one embodiment of the present invention, a projection of the pole welding area along the height direction of the battery is located within the range where the hollow area is located.

[0011] In one embodiment of the present invention, the projection of the pole in the height direction of the battery falls within the range of the hollow area.

[0012] In an embodiment of the present invention, the hollow area includes a first area and a second area, the first area includes a first through hole, the first through hole is opposite to the pole welding area, and the second area includes a plurality of second through holes.

[0013] In an embodiment of the present invention, the second area is disposed adjacent to the first area.

[0014] In an embodiment of the present invention, the second area surrounds the first area.

[0015] In an embodiment of the present invention, a plurality of second through hole arrays are arranged in the second area.

[0016] In an embodiment of the present invention, at least one reinforcement member is further provided on the second insulating member, and the reinforcement member includes a first reinforcement rib, and the first reinforcement rib is arranged around the hollow area.

[0017] The reinforcing member is disposed on a side of the second insulating member facing the first insulating member.

[0018] The utility model also provides an electrical device, comprising the battery as described above.

[0019] The above technical solution of the utility model has the following advantages compared with the prior art:

[0020] A battery described in the utility model is provided with a shell, a battery cell assembly, an adapter and a top cover assembly, the top cover assembly includes a cover plate, a pole and an insulating member, wherein the pole is arranged on the cover plate, the insulating member includes a first insulating member and a second insulating member rotatably connected, the second insulating member can be rotated to be opposite to the first insulating member, and a hollow area is provided on the second insulating member, the hollow area is opposite to the pole welding area, and the hollow area and the projection of the pole welding area along the height direction of the battery at least partially overlap, so that when the pole and the adapter are welded, the hollow area can play a good heat dissipation role, avoid the high temperature causing the insulating member to melt, and the generated fragments fall into the battery cell assembly, thereby avoiding the battery cell assembly catching fire and causing safety problems such as battery short circuit. The utility model can improve the qualified rate in battery production, thereby reducing the proportion of scrapped batteries;

[0021] On the other hand, by providing a hollow structure in the second insulating part, the welding area of ​​the pole can be increased, thereby increasing the overcurrent and improving the stability of the battery. It can also reduce the pressure on other structures caused by meeting the overcurrent, thereby improving the safety performance of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to make the content of the utility model easier to understand, the utility model is further described in detail according to the specific embodiments of the utility model in combination with the accompanying drawings, wherein

[0023] Figure 1 It is a structural schematic diagram of a top cover assembly of a preferred embodiment of the utility model.

[0024] Figure 2 It is a schematic diagram of the overall structure of a battery in a preferred embodiment of the utility model.

[0025] Figure 3 It is a structural schematic diagram of one embodiment of the second insulating member of the insulating component of the top cover assembly of the preferred embodiment of the utility model.

[0026] Figure 4 It is a structural schematic diagram of one embodiment of the second insulating member of the insulating component of the top cover assembly of the preferred embodiment of the utility model.

[0027] Figure 5 It is a structural schematic diagram of one embodiment of the second insulating member of the insulating component of the top cover assembly of the preferred embodiment of the utility model.

[0028] Figure 6 It is a structural schematic diagram of one embodiment of the second insulating member of the insulating component of the top cover assembly of the preferred embodiment of the utility model.

[0029] Explanation of the reference numerals in the specification: 10, shell; 100, battery cell assembly; 101, cover plate; 102, pole; 1, first insulating member; 2, second insulating member; 3, hollow area; 31, first through hole; 32, second through hole; 41, first reinforcing rib; 42, second reinforcing rib. DETAILED DESCRIPTION

[0030] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0031] Embodiment 1

[0032] Reference Figure 1 , Figure 2 as well as Figure 3 As shown, the utility model discloses a battery, comprising a housing 10, wherein one end of the housing 10 along the height direction of the battery has an opening;

[0033] The battery further includes a cell assembly 100 , and the cell assembly 100 is accommodated in the housing 10 ;

[0034] The battery further includes a switching plate, and the switching plate is located in the housing 10;

[0035] The battery further includes a top cover assembly, which is disposed at the opening of the housing. Specifically, the top cover assembly includes a cover plate 101, a pole 102, and an insulating member, wherein the pole 102 is disposed on the cover plate 101, and the pole 102 and the cover plate 101 are insulated from each other. The insulating member is connected to the cover plate 101, and the insulating member is disposed on a side close to the battery cell assembly 100.

[0036] The pole 102 is connected to the adapter, and the portion of the adapter connected to the pole 102 is a pole welding area. In detail, during the production process, after the pole ear of the battery is ultrasonically welded to the adapter, the adapter is laser welded to the pole 102.

[0037] Specifically, the insulating member includes a first insulating member 1 and a second insulating member 2, and the second insulating member 2 is rotatably connected to the first insulating member 1. The first insulating member 1 is used to separate the battery cell assembly 100 and the cover plate 101. It should be noted that the insulating member has a pre-installed state and an installed state. When in the pre-installed state, the first insulating member 1 and the second insulating member 2 are unfolded from each other, and the angle between the first insulating member 1 and the second insulating member 2 can be any non-zero angle. When the insulating member is assembled to the battery and is in the installed state, the first insulating member 1 is connected to the cover plate 101, and the second insulating member 2 is rotated to be opposite to the first insulating member 1 and interlocked with each other, and the extension direction of the second insulating member 2 is the same as the extension direction of the first insulating member 1.

[0038] Furthermore, combined with Figure 1 and Figure 3 From the perspective of the embodiment, the second insulating member 2 is provided with a hollow area 3. When the second insulating member 2 is rotated to be opposite to the first insulating member 1, at least part of the adapter is located between the first insulating member 1 and the second insulating member 2. The hollow area 3 is opposite to the pole welding area, and the projection of the hollow area 3 and the pole welding area along the height direction of the battery at least partially overlaps. In this way, when the pole 102 is designed as a larger pole due to overcurrent considerations, the power of the adapter is increased when performing laser welding with the pole 102, resulting in greater heat generation, so that when the second insulating member 1 is buckled with the first insulating member 2, the setting of the hollow area 3 can effectively dissipate heat.

[0039] It can be known from this that a battery to be protected by the utility model is provided with a shell, a battery cell assembly, an adapter and a top cover assembly, the top cover assembly includes a cover plate, a pole and an insulating member, wherein the pole is arranged on the cover plate, the insulating member includes a first insulating member and a second insulating member that are rotatably connected, the second insulating member can be rotated to be opposite to the first insulating member, and a hollow area is provided on the second insulating member, the hollow area is opposite to the pole welding area, and the hollow area and the projection of the pole welding area along the height direction of the battery at least partially overlap, so that when the pole and the adapter are welded, the hollow area can play a good heat dissipation role, avoid the high temperature causing the insulating member to melt, and the generated fragments fall into the battery cell assembly, so as to avoid the battery cell assembly catching fire and causing safety problems such as battery short circuit, and the utility model can improve the qualified rate in battery production and reduce the proportion of scrapped batteries. On the other hand, by arranging a hollow structure on the second insulating member, the welding area of ​​the pole can be increased, thereby increasing the overcurrent, improving the stability of the battery, and reducing the pressure on other structures to meet the overcurrent, thereby improving the safety performance of the battery.

[0040] As a preferred embodiment, two second insulating members 2 are provided, and the two second insulating members 2 are respectively arranged at two ends of the first insulating member 1 along the longitudinal direction.

[0041] Furthermore, since the pole welding area is a part of the pole 102 , in order to achieve sufficient heat dissipation during the welding process, the projection of the pole welding area along the height direction of the battery is located within the range where the hollow area 3 is located.

[0042] Furthermore, during the welding process, since the heat in the pole welding area is the highest, the temperature of the pole welding area is the highest, and the temperature of the pole 102 itself is second. In order to improve the heat dissipation effect, the hollow area 3 can also correspond to the area where the pole 102 is located, and the projection of the pole 102 in the height direction of the battery falls within the range of the hollow area 3.

[0043] As a special implementation, the pole 102 may also be of an irregular shape. In the case where the pole 102 is of an irregular shape, the projection of the pole 102 on one side close to the battery cell assembly also falls within the hollow area 3 .

[0044] As a preferred embodiment, in order to reduce assembly errors, simplify assembly steps, and facilitate installation and positioning between the first insulating member 1 and the second insulating member 2, the first insulating member 1 and the second insulating member 2 are designed as an integrated unit. This arrangement can also effectively improve the rigidity of the insulating member as a whole and help control dimensional errors.

[0045] Of course, the first insulating member 1 and the second insulating member 2 may also be of split design, and the first insulating member 1 and the second insulating member 2 may be fixedly connected by bonding, hot-melt connection, ultrasonic connection, or the like.

[0046] Specifically, the first insulating member 1 and the second insulating member 2 are respectively provided with a clamping portion and / or a buckle portion, and the first insulating member 1 and the second insulating member 2 are connected by a buckle, so that after assembly, the relative position relationship between the first insulating member 1 and the second insulating member 2 can be ensured, and the stability of battery assembly is improved. As a preferred embodiment, the first insulating member 1 is provided with a clamping portion, and the second insulating member 2 is provided with a buckle portion, and the clamping portion and the buckle portion cooperate with each other, so that the second insulating member 2 and the first insulating member 1 are tightly buckled, and there is no need to occupy the internal space of the battery, thereby reserving sufficient space for the battery cell assembly and improving the energy density of the battery.

[0047] As a preferred embodiment, a clamping portion may be provided on the first insulating member 1, and correspondingly, a buckle portion may be provided on the second insulating member 2; or, a buckle portion may be provided on the first insulating member 1, and correspondingly, a clamping portion may be provided on the second insulating member 2, so as to further ensure the stability of the connection between the first insulating member 1 and the second insulating member 2.

[0048] Embodiment 2

[0049] Different from the first embodiment, one second insulating member 2 is provided, and the second insulating member 2 is rotatably connected to any end of the first insulating member 1 in the longitudinal direction.

[0050] The other structures are the same as those in the first embodiment and will not be described again here.

[0051] Embodiment 3

[0052] Different from the first embodiment, according to Figure 4 As shown, the hollow area 3 includes a first area and a second area, the first area includes a first through hole 31, the first through hole 31 is located opposite to the pole welding area, and the second area includes a plurality of second through holes 32, and the second area is arranged adjacent to the first area. Therefore, by providing the first through hole 31 and the plurality of second through holes 32, heat dissipation can be achieved on the one hand, and the structural strength of the hollow area 3 can be enhanced on the other hand to avoid deformation.

[0053] As a preferred embodiment, a plurality of second through holes 32 are arranged in an array in the second region to form a local hollow structure. The second through holes 32 can serve as heat dissipation holes to dissipate heat and improve the structural stability of the second insulating member 2 .

[0054] The other structures are the same as those in the first embodiment and will not be described again here.

[0055] Embodiment 4

[0056] Different from the third embodiment, Figure 5 As shown, the second area surrounds the first area. This arrangement can not only play a role in heat dissipation, but also improve the structural strength of the hollow area 3, and does not occupy the space of the tab, thereby improving space utilization.

[0057] As a preferred embodiment, the plurality of second through holes 32 located in the second area are spaced apart in the same direction to form a grid shape, and the first through hole 31 is located at the geometric center of the second area. The first through hole 31 is used for heat dissipation, and the grid-like structure can further enhance the structural strength of the hollow area 3, thereby both playing a role in heat dissipation and enhancing the structural strength of the second insulating member 2.

[0058] The other structures are the same as those in the third embodiment and will not be described again here.

[0059] Embodiment 5

[0060] The difference from the first to fourth embodiments is that, referring to Figures 3 to 6 As shown, at least one reinforcing member is further provided on the second insulating member 2, and the reinforcing member includes a first reinforcing rib 41, and the first reinforcing rib 41 is arranged around the hollow area 3. In this way, the first reinforcing rib 41 can strengthen the structural strength of the second insulating member 2, and when the second insulating member 2 is buckled with the first insulating member 1, the buckling position can be made more accurate.

[0061] As a preferred implementation, in order to further improve the strength of the first reinforcing rib 41 , the first reinforcing rib 41 is disposed along the edge of the hollow area 3 .

[0062] In detail, the first reinforcing rib 41 may be continuous, so as to form a closed loop around the hollow area 3. Of course, in some other embodiments, the first reinforcing rib 41 may also be discontinuous, and the first reinforcing rib 41 may include a plurality of reinforcing strips, and the plurality of reinforcing strips are arranged at intervals around the hollow area 3.

[0063] As a preferred embodiment, for the purpose of saving space, the reinforcement is arranged on the side of the second insulating member 2 facing the first insulating member 1. Thereby, more space is reserved for the assembly of other structures in the battery, thereby effectively improving the space utilization rate, thereby improving the energy density of the battery. It should be noted that when the second insulating member 2 is rotated to be opposite to the first insulating member 1, the reinforcement is arranged on the side of the second insulating member 2 facing the first insulating member 1. Therefore, the reinforcement utilizes the gap formed by the buckling of the first insulating member 1 and the second insulating member 2, and does not occupy additional space in the height direction of the battery, thereby effectively improving the space utilization rate and improving the energy density of the battery.

[0064] The other structures are the same as those of Embodiments 1 to 4 and will not be described again here.

[0065] Embodiment 6

[0066] The difference from the fifth embodiment is that Figure 4 as well as Figure 6 From a perspective, in order to further enhance the structural strength of the second insulating member 2 , the reinforcing member further includes a second reinforcing rib 42 , and the second reinforcing rib 42 is arranged along the extension direction of the second insulating member 2 .

[0067] In detail, the second reinforcing rib 42 may be connected to the first reinforcing rib 41 , or may be provided independently of the first reinforcing rib 41 .

[0068] As a preferred embodiment, since the corresponding position of the first reinforcing rib 41 is the pole welding area, the spatial area may be narrower than other positions on the second insulating member 2. Therefore, the height of the first reinforcing rib 41 can be adjusted according to the spatial difference. In order to avoid the first reinforcing rib 41 interfering with the welding of the pole 102 and the adapter, the height of the first reinforcing rib 41 is appropriately reduced compared with other reinforcing ribs.

[0069] The other structures are the same as those in the fifth embodiment and will not be described again here.

[0070] Embodiment 7

[0071] The utility model also discloses an electrical device, which includes the battery as described in Embodiments 1 to 6.

[0072] The electrical equipment using the battery can obtain relatively stable and lasting power supply. And because the stability of the battery is improved, the safety performance of the battery is also effectively improved, so the safety performance of the electrical equipment is also improved.

[0073] Electrical equipment may be automobiles, portable devices, laptops, ships, spacecraft, electric toys, electric tools, and the like. Automobiles may be fuel-powered automobiles, gas-powered automobiles, or new energy automobiles. New energy automobiles may be pure electric vehicles, hybrid electric vehicles, or extended-range vehicles, and the like; spacecraft include airplanes, rockets, space shuttles, and spacecraft, and the like; electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the like; electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, and the like. The embodiments of the present invention do not impose any special restrictions on the above-mentioned electrical equipment.

[0074] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0075] In the description of the present utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0076] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0077] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A battery, characterized in that: include, Housing (10); A battery cell assembly (100), which is located in the housing (10); Adapter; A top cover assembly is arranged at the opening of the shell (10), the top cover assembly comprises a cover plate (101), a pole (102) and an insulating component, the pole (102) is arranged on the cover plate (101), the insulating component is connected to the cover plate (101), the pole (102) is connected to the adapter plate, and the connection between the adapter plate and the pole is a pole welding area; the insulating component comprises a first insulating member (1) and a second insulating member (2), the second insulating member (2) is rotatably connected to the first insulating member (1), a hollow area (3) is provided on the second insulating member (2), when the second insulating member (2) is rotated to be opposite to the first insulating member (1), at least part of the adapter plate is located between the first insulating member (1) and the second insulating member (2), the hollow area (3) is opposite to the pole welding area, and the projection of the hollow area (3) and the pole welding area along the height direction of the battery at least partially overlaps.

2. A battery according to claim 1, characterized in that: The projection of the pole welding area along the height direction of the battery is located within the range where the hollow area (3) is located.

3. A battery according to claim 1, characterized in that: The projection of the pole in the height direction of the battery falls within the range of the hollow area (3).

4. A battery according to claim 1, characterized in that: The hollow area (3) comprises a first area and a second area, the first area comprises a first through hole (31), the first through hole (31) is opposite to the pole welding area, and the second area comprises a plurality of second through holes (32).

5. A battery according to claim 4, characterized in that: The second area is disposed adjacent to the first area.

6. A battery according to claim 4, characterized in that: The second area surrounds the first area.

7. A battery according to claim 4, characterized in that: A plurality of the second through holes (32) are arranged in an array in the second area.

8. A battery according to any one of claims 1 to 7, characterized in that: At least one reinforcement member is also provided on the second insulating member (2), the reinforcement member comprising a first reinforcement rib (41), and the first reinforcement rib (41) is arranged around the hollow area (3).

9. A battery according to claim 8, characterized in that: The reinforcement member is arranged on a side of the second insulating member (2) facing the first insulating member (1).

10. An electrical equipment, characterized in that: Comprising a battery as claimed in any one of claims 1 to 9.

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