Battery and electric device

Abstract

The utility model relates to the technical field of battery cell arrangement, in particular to a battery and a power utilization device, the battery comprises a first plate, a second plate, a third plate, a battery cell and a pole, and the first plate and the third plate are arranged in parallel. The second plate is connected with the first plate and the third plate, and a containing cavity is formed among the first plate, the second plate and the third plate. And the battery cell is positioned in the accommodating cavity. The thickness of the first plate and the thickness of the third plate are both smaller than the thickness of the second plate. The pole is mounted on the first plate, and the battery cell is connected with the pole. The third plate is provided with an anti-explosion groove, and the anti-explosion groove is communicated with the containing cavity. According to the invention, the energy density can be increased.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery arrangement, in particular to a battery and a power utilization device. BACKGROUND

[0002] The battery is a product for storing electric energy, which can supply power to various functional modules by being connected thereto.

[0003] The battery includes a shell, a battery cell and a pole, the shell can accommodate the battery cell, the pole is installed on the shell, and the battery cell can form a loop with other functional modules through the pole to supply power thereto.

[0004] In the related art, the energy density of the battery is low, resulting in a long charging time. CONTENT OF THE INVENTION

[0005] In view of this, the present application provides a battery and a power utilization device to increase the energy density thereof.

[0006] Specifically, the technical scheme includes the following:

[0007] The first aspect of the present application provides a battery, which includes a first plate, a second plate, a third plate, a battery cell and a pole, wherein,

[0008] The first plate and the third plate are arranged in parallel.

[0009] The second plate connects the first plate and the third plate, and the first plate, the second plate and the third plate have an accommodation cavity therebetween.

[0010] The battery cell is located in the accommodation cavity.

[0011] The thickness of the first plate and the thickness of the third plate are both less than the thickness of the second plate.

[0012] The pole is installed on the first plate, and the battery cell is connected to the pole.

[0013] The third plate has an explosion-proof groove, and the explosion-proof groove is in communication with the accommodation cavity.

[0014] Optionally, the number of the second plates is a plurality, the plurality of second plates are sequentially connected at the head and tail to form a ring shape, and the first plate and the third plate are respectively connected to the plurality of second plates.

[0015] Optionally, the ratio of the maximum thickness of the first plate to the maximum thickness of the second plate is in the range of 0.4 to 1.

[0016] Optionally, the maximum thickness of the first plate is in the range of 0.03 to 0.2 mm,

[0017] and / or,

[0018] The maximum thickness of the second plate ranges from 0.05 to 0.3 mm,

[0019] and / or,

[0020] The maximum thickness of the third plate ranges from 0.04 to 0.25 mm.

[0021] Optionally, the maximum thickness of the third plate is greater than the maximum thickness of the first plate.

[0022] Optionally, the difference between the maximum thickness of the third plate and the maximum thickness of the first plate ranges from 0.04 to 0.1 mm,

[0023] and / or,

[0024] The maximum thickness of the first plate ranges from 0.03 to 0.4 mm.

[0025] Optionally, the burst pressure of the anti-explosion groove is less than 0.8 MPa.

[0026] Optionally, the maximum thickness of the third plate ranges from 0.03 to 2 mm, and the ratio of the depth of the anti-explosion groove to the maximum thickness of the third plate ranges from 0.2 to 0.8.

[0027] Optionally, the product of the burst pressure of the anti-explosion groove and the capacity of the battery cell ranges from 0.2 to 5 Ah·MPa.

[0028] The second aspect of the present application provides a power consumption device, which comprises the battery as described in the above technical solution.

[0029] The technical solution provided by the embodiments of the present application has at least the following beneficial effects: the accommodation cavity can accommodate the battery cell, and the battery cell can form a loop with other functional modules through the pole installed on the first plate. The thickness of the first plate and the thickness of the third plate are both less than the thickness of the second plate. Compared with the existing battery, the accommodation cavity has a larger volume under the same volume, and can accordingly accommodate a larger volume of battery cell, which is conducive to increasing the energy density of the battery cell. The first plate is installed with the pole, and the third plate has the anti-explosion groove, both of which can be broken by the gas generated when the battery cell is in thermal runaway, so as to avoid the explosion of the whole battery, which is conducive to reducing the situation that the increase of the energy density of the battery cell leads to thermal runaway and explosion. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments will be briefly introduced. Obviously, the drawings in the following description only represent some of the embodiments of the present application, and other drawings can be obtained by those of ordinary skill in the art without any creative effort.

[0031] Figure 1 A structural schematic diagram of a battery is provided in the embodiments of the present application.

[0032] The reference signs in the drawings represent respectively:

[0033] 100, accommodating cavity;

[0034] 1, first plate;

[0035] 2, second plate;

[0036] 3, third plate; 301, explosion-proof groove;

[0037] 4, battery cell; 41, tab;

[0038] 5, pole.

[0039] The above drawings have shown the specific embodiments of the present application, which will be described in more detail hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application by any means, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without any creative effort belong to the scope of protection of the present application.

[0041] The positional nouns such as “upper”, “lower”, “lateral” and the like involved in the embodiments of the present application are generally based on the relative relationship of the positions shown in the drawings, and these positional nouns are only used to more clearly describe the structure and the relationship between the structures, and are not intended to describe absolute positions. When the product is placed in different attitudes, the positions may change, for example, “upper” and “lower” may be interchanged. Figure 1

[0042] Unless otherwise defined, all the technical terms used in the embodiments of the present application have the same meanings as generally understood by those of ordinary skill in the art.

[0043] ​In order to make the technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the drawings.

[0044] The first aspect of the present application provides a battery, such as Figure 1 As shown in the drawings, the battery comprises a first plate 1, a second plate 2, a third plate 3, a battery cell 4 and a pole 5, wherein,

[0045] The first plate 1 and the third plate 3 are arranged in parallel.

[0046] The second plate 2 connects the first plate 1 and the third plate 3, and the first plate 1, the second plate 2 and the third plate 3 have a receiving cavity 100 therebetween.

[0047] The battery cell 4 is located in the receiving cavity 100.

[0048] The thickness of the first plate 1 and the thickness of the third plate 3 are both less than the thickness of the second plate 2.

[0049] The pole 5 is mounted on the first plate 1, and the battery cell 4 is connected with the pole 5.

[0050] The third plate 3 has an explosion-proof groove 301, and the explosion-proof groove 301 is in communication with the receiving cavity 100.

[0051] It can be understood that the receiving cavity 100 can accommodate the battery cell 4, and the battery cell 4 can form a loop with other functional modules through the pole 5 mounted on the first plate 1. The thickness of the first plate 1 and the thickness of the third plate 3 are both less than the thickness of the second plate 2, and compared with the existing battery, the receiving cavity 100 has a larger volume under the same volume, and accordingly can accommodate a larger volume of the battery cell 4, so as to facilitate the increase of the energy density of the battery cell 4. The first plate 1 is mounted with the pole 5, and the third plate 3 has the explosion-proof groove 301, which can be broken by the gas generated when the battery cell 4 occurs thermal runaway to avoid the explosion of the whole battery, so as to facilitate the reduction of the explosion caused by the increase of the energy density of the battery cell 4.

[0052] In the embodiments of the present application, since the first plate 1 is mounted with the pole 5, and the third plate 3 has the explosion-proof groove 301, and the thickness of both is less than the thickness of the second plate 2, the structural strength of the first plate 1 and the third plate 3 is less than the structural strength of the second plate 2. When the battery cell 4 occurs thermal runaway, the first plate 1 and the third plate 3 will be crushed by the gas generated by thermal runaway before the second plate 2 is destroyed, so as to regulate the jet direction of the gas when thermal runaway occurs, and thus improve the reliability of the battery.

[0053] In the embodiments of the present application, the first plate 1 and the second plate 2 can be connected by bonding, welding and one-piece forming process.

[0054] In the embodiments of the present application, the third plate 3 and the second plate 2 can be connected by adhesion, welding, and one-piece forming, etc.

[0055] In the embodiments of the present application, the first plate 1 is arranged with a through hole accommodating the pole 5, and the pole 5 is located in the through hole and connected with the side wall of the through hole. Among them, the first plate 1 and the side wall of the through hole can be arranged with an insulating cover.

[0056] In the embodiments of the present application, the first plate 1 and the second plate 2 can be connected by welding, and the depth of the weld pool between the two is 150-400 um; the depth of the weld is 700-1000 um; the aspect ratio of the weld is 0.3-0.4, and the depth of the weld pool of the first plate 1 and the second plate 2 is less than 1 / 3 of the thickness of the first plate 1.

[0057] In some embodiments of the present application, as shown in Figure 1 The number of the second plate 2 is multiple, the first plate 1 and the third plate 3 are connected with the multiple second plates 2.

[0058] It can be understood that the multiple second plates 2 are connected in series to form a ring, which is conducive to cooperating with the first plate 1 and the third plate 3 to form a relatively sealed accommodating cavity 100, which is conducive to injecting electrolyte into the accommodating cavity 100 and generating electric energy with the battery cell 4.

[0059] In the embodiments of the present application, the adjacent second plates 2 can be connected by adhesion, welding, or one-piece forming, etc.

[0060] In the embodiments of the present application, the number of the second plate 2 can be 2, 3, 4, or 5, or other numbers.

[0061] In some embodiments of the present application, the ratio of the maximum thickness of the first plate 1 to the maximum thickness of the second plate 2 is in the range of 0.4 to 1.

[0062] It can be understood that within the above range, the accommodating cavity 100 has a larger volume to accommodate electrolyte and the battery cell 4, and at the same time, the first plate 1 tends to be damaged before the second plate 2 when the battery cell 4 is in thermal runaway, thereby improving the reliability.

[0063] In the embodiments of the present application, for the two opposite faces of the first plate 1 along the thickness direction, both can be planar or curved, or one can be planar and the other can be curved.

[0064] In the embodiments of the present application, the ratio of the maximum thickness of the first plate 1 to the maximum thickness of the second plate 2 can be 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, or 1, or other values in the range of 0.4 to 1.

[0065] In some embodiments of the present application, the maximum thickness of the first plate 1 ranges from 0.03 to 0.2 mm.

[0066] It can be understood that, within the above range, the first plate 1 can form stable support for the pole 5, and can also be destroyed by the gas generated when the battery cell 4 experiences thermal runaway, thus improving the reliability of the battery.

[0067] In embodiments of the present application, the maximum thickness of the first plate 1 can be 0.03 mm, 0.04 mm, 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, 0.1 mm, 0.11 mm, 0.12 mm, 0.13 mm, 0.14 mm, 0.15 mm, 0.16 mm, 0.17 mm, 0.18 mm, 0.19 mm, or 0.2 mm, and can also be other values within the range of 0.03 to 0.2 mm.

[0068] In some embodiments of the present application, the maximum thickness of the second plate 2 ranges from 0.05 to 0.3 mm.

[0069] It can be understood that, within the above range, the second plate 2 can support the accommodation cavity 100, and be destroyed by the gas generated when the battery cell 4 experiences thermal runaway later than the first plate 1 and the third plate 3, thus improving the reliability of the battery.

[0070] In embodiments of the present application, the maximum thickness of the second plate 2 can be 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, 0.1 mm, 0.11 mm, 0.12 mm, 0.13 mm, 0.14 mm, 0.15 mm, 0.16 mm, 0.17 mm, 0.18 mm, 0.19 mm, 0.2 mm, 0.21 mm, 0.22 mm, 0.23 mm, 0.24 mm, 0.25 mm, 0.26 mm, 0.27 mm, 0.28 mm, 0.29 mm, or 3 mm, and can also be other values within the range of 0.05 to 0.3 mm.

[0071] In some embodiments of the present application, the maximum thickness of the third plate 3 ranges from 0.04 to 0.25 mm.

[0072] It can be understood that, within the above range, the second plate 2 can form stable support for the injected electrolyte, and can also be destroyed by the gas generated when the battery cell 4 experiences thermal runaway, thus improving the reliability of the battery.

[0073] In the embodiments of the present application, the maximum thickness of the third plate 3 can be 0.04mm, 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.1mm, 0.11mm, 0.12mm, 0.13mm, 0.14mm, 0.15mm, 0.16mm, 0.17mm, 0.18mm, 0.19mm, 0.2mm, 0.21mm, 0.22mm, 0.23mm, 0.24mm or 0.25mm, or other values within the range of 0.04mm to 0.25mm.

[0074] In some embodiments of the present application, the maximum thickness of the first plate 1 ranges from 0.03mm to 0.2mm, and the maximum thickness of the second plate 2 ranges from 0.05mm to 0.3mm.

[0075] It can be understood that such a configuration is conducive to the second plate 2 being destroyed later than the first plate 1 by the gas generated when the battery cell 4 is in thermal runaway, which is conducive to improving the reliability of the battery.

[0076] In the embodiments of the present application, the maximum thickness of the first plate 1 can be 0.03mm, 0.04mm, 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.1mm, 0.11mm, 0.12mm, 0.13mm, 0.14mm, 0.15mm, 0.16mm, 0.17mm, 0.18mm, 0.19mm or 0.2mm, or other values within the range of 0.03mm to 0.2mm.

[0077] In the embodiments of the present application, the maximum thickness of the second plate 2 can be 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.1mm, 0.11mm, 0.12mm, 0.13mm, 0.14mm, 0.15mm, 0.16mm, 0.17mm, 0.18mm, 0.19mm, 0.2mm, 0.21mm, 0.22mm, 0.23mm, 0.24mm, 0.25mm, 0.26mm, 0.27mm, 0.28mm, 0.29mm or 3mm, or other values within the range of 0.05mm to 0.3mm.

[0078] In some embodiments of the present application, the maximum thickness of the first plate 1 ranges from 0.03mm to 0.2mm, and the maximum thickness of the third plate 3 ranges from 0.04mm to 0.25mm.

[0079] It can be understood that the thicknesses of the first plate 1 and the third plate 3 are thin, which is conducive to being destroyed by the gas generated when the battery cell 4 is in thermal runaway, which is conducive to improving the reliability of the battery.

[0080] In the embodiments of the present application, the maximum thickness of the first plate 1 can be 0.03mm, 0.04mm, 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.1mm, 0.11mm, 0.12mm, 0.13mm, 0.14mm, 0.15mm, 0.16mm, 0.17mm, 0.18mm, 0.19mm or 0.2mm, and can also be other values in the range of 0.03mm to 0.2mm.

[0081] In the embodiments of the present application, the maximum thickness of the third plate 3 can be 0.04mm, 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.1mm, 0.11mm, 0.12mm, 0.13mm, 0.14mm, 0.15mm, 0.16mm, 0.17mm, 0.18mm, 0.19mm, 0.2mm, 0.21mm, 0.22mm, 0.23mm, 0.24mm or 0.25mm, and can also be other values in the range of 0.04mm to 0.25mm.

[0082] In some embodiments of the present application, the maximum thickness of the second plate 2 is in the range of 0.05mm to 0.3mm, and the maximum thickness of the third plate 3 is in the range of 0.04mm to 0.25mm.

[0083] It can be understood that such a configuration is conducive to the second plate 2 being destroyed later than the first plate 1 by the gas generated when the battery cell 4 is thermally out of control, and thus is conducive to improving the reliability of the battery.

[0084] In the embodiments of the present application, the maximum thickness of the second plate 2 can be 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.1mm, 0.11mm, 0.12mm, 0.13mm, 0.14mm, 0.15mm, 0.16mm, 0.17mm, 0.18mm, 0.19mm, 0.2mm, 0.21mm, 0.22mm, 0.23mm, 0.24mm, 0.25mm, 0.26mm, 0.27mm, 0.28mm, 0.29mm or 3mm, and can also be other values in the range of 0.05mm to 0.3mm.

[0085] In the embodiments of the present application, the maximum thickness of the third plate 3 can be 0.04mm, 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.1mm, 0.11mm, 0.12mm, 0.13mm, 0.14mm, 0.15mm, 0.16mm, 0.17mm, 0.18mm, 0.19mm, 0.2mm, 0.21mm, 0.22mm, 0.23mm, 0.24mm or 0.25mm, or other values within the range of 0.04mm to 0.25mm.

[0086] In some embodiments of the present application, the maximum thickness of the first plate 1 ranges from 0.03mm to 0.2mm, the maximum thickness of the second plate 2 ranges from 0.05mm to 0.3mm, and the maximum thickness of the third plate 3 ranges from 0.04mm to 0.25mm.

[0087] It can be understood that the thicknesses of the first plate 1 and the third plate 3 are set to be thinner, which can be destroyed by the gas generated by the thermal runaway of the battery cell 4 earlier than the second plate 2, thus improving the reliability of the battery.

[0088] In the embodiments of the present application, the maximum thickness of the first plate 1 can be 0.03mm, 0.04mm, 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.1mm, 0.11mm, 0.12mm, 0.13mm, 0.14mm, 0.15mm, 0.16mm, 0.17mm, 0.18mm, 0.19mm or 0.2mm, or other values within the range of 0.03mm to 0.2mm.

[0089] In the embodiments of the present application, the maximum thickness of the second plate 2 can be 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.1mm, 0.11mm, 0.12mm, 0.13mm, 0.14mm, 0.15mm, 0.16mm, 0.17mm, 0.18mm, 0.19mm, 0.2mm, 0.21mm, 0.22mm, 0.23mm, 0.24mm, 0.25mm, 0.26mm, 0.27mm, 0.28mm, 0.29mm or 3mm, or other values within the range of 0.05mm to 0.3mm.

[0090] In the embodiments of the present application, the maximum thickness of the third plate 3 can be 0.04 mm, 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, 0.1 mm, 0.11 mm, 0.12 mm, 0.13 mm, 0.14 mm, 0.15 mm, 0.16 mm, 0.17 mm, 0.18 mm, 0.19 mm, 0.2 mm, 0.21 mm, 0.22 mm, 0.23 mm, 0.24 mm, or 0.25 mm, or other values within the range of 0.04-0.25 mm.

[0091] In some embodiments of the present application, the maximum thickness of the third plate 3 is greater than the maximum thickness of the first plate 1.

[0092] It can be understood that the third plate 3 has the explosion-proof groove 301, and the first plate 1 is installed with the pole 5, both of which play a role in pressure relief when the battery cell 4 is in thermal runaway. The maximum thickness of the third plate 3 is greater than the maximum thickness of the first plate 1, which is conducive to the third plate 3 and the first plate 1 having similar burst pressures, i.e., both of them can tend to be destroyed at the same time when the battery cell 4 is in thermal runaway, thus improving the reliability of the battery.

[0093] In some embodiments of the present application, the difference between the maximum thickness of the third plate 3 and the maximum thickness of the first plate 1 is within the range of 0.04-0.1 mm.

[0094] It can be understood that within the above range, the third plate 3 and the first plate 1 have similar burst pressures.

[0095] In the embodiments of the present application, the difference between the maximum thickness of the third plate 3 and the maximum thickness of the first plate 1 can be 0.04 mm, 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, or 0.1 mm, or other values within the range of 0.04-0.1 mm.

[0096] In some embodiments of the present application, the maximum thickness of the first plate 1 is within the range of 0.03-0.4 mm.

[0097] In the embodiments of the present application, the maximum thickness of the first plate 1 can be 0.03mm, 0.04mm, 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.1mm, 0.11mm, 0.12mm, 0.13mm, 0.14mm, 0.15mm, 0.16mm, 0.17mm, 0.18mm, 0.19mm, 0.2mm, 0.21mm, 0.22mm, 0.23mm, 0.24mm, 0.25mm, 0.26mm, 0.27mm, 0.28mm, 0.29mm, 0.3mm, 0.31mm, 0.32mm, 0.33mm, 0.34mm, 0.35mm, 0.36mm, 0.37mm, 0.38mm, 0.39mm or 0.4mm, or other values within the range of 0.03mm to 0.4mm.

[0098] In some embodiments of the present application, the difference between the maximum thickness of the third plate 3 and the maximum thickness of the first plate 1 is within the range of 0.04mm to 0.1mm, and the maximum thickness of the first plate 1 is within the range of 0.03mm to 0.4mm.

[0099] It can be understood that within the above range, the third plate 3 and the first plate 1 have similar burst pressures.

[0100] In the embodiments of the present application, the difference between the maximum thickness of the third plate 3 and the maximum thickness of the first plate 1 can be 0.04mm, 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm or 0.1mm, or other values within the range of 0.04mm to 0.1mm.

[0101] In the embodiments of the present application, the maximum thickness of the first plate 1 can be 0.03mm, 0.04mm, 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.1mm, 0.11mm, 0.12mm, 0.13mm, 0.14mm, 0.15mm, 0.16mm, 0.17mm, 0.18mm, 0.19mm, 0.2mm, 0.21mm, 0.22mm, 0.23mm, 0.24mm, 0.25mm, 0.26mm, 0.27mm, 0.28mm, 0.29mm, 0.3mm, 0.31mm, 0.32mm, 0.33mm, 0.34mm, 0.35mm, 0.36mm, 0.37mm, 0.38mm, 0.39mm or 0.4mm, or other values within the range of 0.03mm to 0.4mm.

[0102] In some embodiments of the present application, the product of the burst pressure of the explosion-proof groove 301 and the capacity of the battery cell 4 ranges from 0.2 to 5 Ah·MPa.

[0103] It can be understood that the larger the capacity of the battery cell 4, the higher the probability of thermal runaway in general, and therefore controlling the product of the burst pressure of the explosion-proof groove 301 and the capacity of the battery cell 4 to be 0.2 to 5 Ah·MPa is beneficial to improve the reaction sensitivity of the battery to thermal runaway and reduce the occurrence of explosion.

[0104] In embodiments of the present application, the product of the burst pressure of the explosion-proof groove 301 and the capacity of the battery cell 4 can be 0.2 Ah·MPa, 0.5 Ah·MPa, 1 Ah·MPa, 1.5 Ah·MPa, 2 Ah·MPa, 2.5 Ah·MPa, 3 Ah·MPa, 3.5 Ah·MPa, 4 Ah·MPa, 4.5 Ah·MPa or 5 Ah·MPa, or other values within 0.2 to 5 Ah·MPa.

[0105] In some embodiments of the present application, the maximum thickness of the third plate 3 ranges from 0.03 to 2 mm, and the ratio of the depth of the explosion-proof groove 301 to the maximum thickness of the third plate 3 ranges from 0.2 to 0.8.

[0106] In embodiments of the present application, the third plate 3 within the above range is beneficial to support the electrolyte, and the ratio of the depth of the explosion-proof groove 301 to the maximum thickness of the third plate 3 ranges from 0.2 to 0.8, so that the third plate 3 tends to be broken by the gas generated when the battery cell 4 is in thermal runaway before the second plate 2, thereby improving the reliability of the battery.

[0107] In embodiments of the present application, the maximum thickness of the third plate 3 can be 0.03 mm, 0.1 mm, 0.5 mm, 1 mm, 1.5 mm or 2 mm, or other values within 0.03 to 2 mm.

[0108] In embodiments of the present application, the ratio of the depth of the explosion-proof groove 301 to the maximum thickness of the third plate 3 can be 0.2, 0.3, 0.4, 0.5, 0.6, 0.7 or 0.8, or other values within 0.2 to 0.8.

[0109] In some embodiments of the present application, the burst pressure of the explosion-proof groove 301 is less than 0.8 MPa.

[0110] It can be understood that within the above range of values, the explosion-proof groove 301 can have a high reaction sensitivity to the thermal runaway of the battery cell 4 to improve the reliability of the battery.

[0111] In the embodiments of the present application, the burst pressure of the explosion-proof groove 301 can be 0.2 MPa, 0.3 MPa, 0.4 MPa, 0.5 MPa, 0.6 MPa, 0.7 MPa or 0.8 MPa, or other values in the range of 0.2-0.8 MPa.

[0112] The second aspect of the present application provides a power-using device, which comprises the battery of the above technical solution.

[0113] It can be understood that, due to the battery of the above embodiments, the power-using device of the present application has the same technical effects as the above embodiments, which will not be described here again.

[0114] In the embodiments of the present application, the power-using device can be a notebook computer, a smart phone, a tablet computer or the like.

[0115] In the present application, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. The term "a plurality of" refers to two or more, unless otherwise explicitly limited.

[0116] Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the present application disclosed herein. The present application is intended to cover any variations, uses or adaptive changes of the present application following the general principles of the present application and including common knowledge or conventional technical means in the art not disclosed in the present application. The specification and examples are only considered as exemplary.

[0117] It should be understood that the present application is not limited to the precise construction that has been described and shown in the accompanying drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the present application is only limited by the appended claims.

Claims

1. A battery, characterized by, The battery comprises a first plate (1), a second plate (2), a third plate (3), a battery cell (4) and a pole (5), wherein, The first plate (1) and the third plate (3) are arranged in parallel; The second plate (2) connects the first plate (1) and the third plate (3), and the first plate (1), the second plate (2) and the third plate (3) have a receiving cavity (100) therebetween; The battery cell (4) is located in the receiving cavity (100); The thickness of the first plate (1) and the thickness of the third plate (3) are both less than the thickness of the second plate (2); The pole (5) is mounted on the first plate (1), and the battery cell (4) is connected with the pole (5); The third plate (3) has an explosion-proof groove (301) in communication with the receiving cavity (100).

2. The battery of claim 1, wherein, The number of the second plates (2) is multiple, the first plate (1) and the third plate (3) are connected with the multiple second plates (2) in sequence.

3. The battery of claim 1, wherein, The ratio of the maximum thickness of the first plate (1) to the maximum thickness of the second plate (2) is in the range of 0.4 to 1.

4. The battery of claim 3, wherein, The maximum thickness of the first plate (1) is in the range of 0.03 to 0.2mm, and / or, The maximum thickness of the second plate (2) is in the range of 0.05 to 0.3mm, and / or, The maximum thickness of the third plate (3) is in the range of 0.04 to 0.25mm.

5. The battery of claim 1, wherein, The maximum thickness of the third plate (3) is greater than the maximum thickness of the first plate (1).

6. The battery of claim 5, wherein, The difference between the maximum thickness of the third plate (3) and the maximum thickness of the first plate (1) is in the range of 0.04 to 0.1mm, and / or, The maximum thickness of the first plate (1) is in the range of 0.03 to 0.4mm.

7. The battery of claim 1, wherein, The product of the bursting pressure of the explosion-proof groove (301) and the capacity of the battery cell (4) is in the range of 0.2 to 5 Ah·MPa.

8. The battery of claim 7, wherein, The maximum thickness of the third plate (3) is in the range of 0.03 to 0.2mm, and the ratio of the depth of the explosion-proof groove (301) to the maximum thickness of the third plate (3) is in the range of 0.2 to 0.

8.

9. The battery of claim 7, wherein, The bursting pressure of the explosion-proof groove (301) is less than 0.8MPa.

10. An electrical device, characterized by The power device comprises the battery as claimed in any one of claims 1 to 9.

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