Battery casing, battery, and electric device

Abstract

The present disclosure relates to the technical field of batteries, and provides a battery casing, a battery, and an electric device. The battery casing comprises a frame body and cover plates. The cover plates are connected to the frame body, the cover plates and the frame body jointly define an accommodating cavity, and the accommodating cavity is used for accommodating a cell core. The ratio of the hardness HV1 of the frame body to the hardness HV2 of the cover plates satisfies 1≤HV1 / HV2≤3. When the ratio of the hardness HV1 of the frame body to the hardness HV2 of the cover plates satisfies the described value range, by means of multiple experiments, a technician can select a suitable material to manufacture the frame body and the cover plates, thereby enabling the manufacturing of a battery casing.

Description

A battery casing, a battery, and an electrical device.

[0001] Cross-references to related applications

[0002] This disclosure claims priority to Chinese Patent Application No. 202520176279.2, filed on January 26, 2025, entitled “A Battery Housing, Battery and Electrical Device”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to the field of battery technology, specifically to a battery casing, a battery, and an electrical device. Background Technology

[0004] Batteries are common power supply devices in daily life, installed inside electronic devices to provide them with electrical energy. Currently, electronic products are trending towards thinner and lighter designs; to meet this demand, batteries also need to be designed to be thinner and lighter.

[0005] In related technologies, a battery includes a battery casing and an electrode core disposed inside the battery casing. The battery casing protects and seals the electrode core. The battery casing includes a first cover plate and a second cover plate disposed opposite to each other, with a frame sandwiched between the first cover plate and the second cover plate; the first cover plate, the second cover plate, and the frame form a receiving cavity. To meet the requirements of a thinner and lighter battery design, the thickness of the first cover plate and the second cover plate needs to be set within a certain range.

[0006] However, while meeting the above thickness requirements, the hardness requirements of the battery casing cannot be met. Summary of the Invention

[0007] To address the shortcomings of related technologies, this disclosure provides a battery casing, battery, and electrical device that can meet the requirements for thin and light battery design in terms of thickness and the requirements for rigidity of the battery casing.

[0008] In a first aspect, this disclosure provides a battery casing, comprising: a frame and at least one cover plate. The frame has at least one opening. The cover plate closes the opening to form a receiving cavity adapted to receive an electrode core.

[0009] The range of the ratio of the hardness HV1 of the frame to the hardness HV2 of the cover plate is: 1≤HV1 / HV2≤3.

[0010] As an optional implementation, the thickness D of the cover plate is in the range of 0.03mm≤D≤0.5mm.

[0011] As an optional implementation, the tensile strength Rm of the cover plate is in the range of 200MPa≤Rm≤1500MPa.

[0012] As an optional implementation, the thickness D3 of the frame is in the range of 0.15mm≤D3≤0.5mm.

[0013] As an optional implementation, the hardness HV1 of the frame is in the range of HV1≥160.

[0014] As an optional implementation, the tensile strength Rm3 of the frame is in the range of 200MPa≤Rm3≤1500MPa.

[0015] As an alternative implementation, the frame includes multiple sidewalls, at least two adjacent sidewalls being formed by bending.

[0016] As an optional implementation, when the two adjacent sidewalls are formed by bending, a rounded corner is provided between the two adjacent sidewalls, and the radius R of the rounded corner is in the range of R≥0.5mm.

[0017] As an alternative implementation, the plurality of sidewalls are formed by bending.

[0018] As an optional implementation, the frame has one seam.

[0019] As an optional implementation, the cover plate is a rectangular plate.

[0020] As an optional implementation, the cover plate is a stepped plate.

[0021] As an optional implementation, the number of cover plates is two, and the frame has two openings arranged opposite to each other;

[0022] The two cover plates respectively close the two openings to form the receiving cavity.

[0023] As an alternative implementation, the two cover plates are arranged in parallel.

[0024] As an optional implementation, the battery casing is provided with a thinning portion.

[0025] As an optional implementation, the thinning portion is disposed on the cover plate.

[0026] As an optional implementation, both the frame and the cover are made of titanium alloy.

[0027] As an optional implementation, the thickness D3 of the frame is in the range of 0.15mm≤D3≤0.25mm.

[0028] As an optional implementation, the tensile strength Rm3 of the frame is in the range of: Rm3≥600MPa.

[0029] As an optional implementation, the ratio of the hardness HV1 of the frame to the hardness HV2 of the cover plate is in the range of 1.2 ≤ HV1 / HV2 ≤ 3.

[0030] In a second aspect, this disclosure provides a battery comprising a battery casing and an electrode core as described in any of the first aspects above, wherein the electrode core is housed in the receiving cavity.

[0031] Thirdly, this disclosure provides an electrical device, which includes the battery described in the second aspect above.

[0032] The battery casing includes a frame and a cover plate. The cover plate is connected to the frame and encloses the frame to form a cavity for housing the electrode core. This design protects the electrode core from external damage, thus extending the battery's lifespan. When the cavity is sealed, it effectively seals the electrode core.

[0033] The ratio of the frame's hardness HV1 to the cover's hardness HV2 falls within the range of 1 ≤ HV1 / HV2 ≤ 3. When this ratio satisfies this range, technicians, through numerous experiments, can select suitable materials to manufacture the frame and cover, thus producing a battery casing. The cover thickness of this battery casing is 0.03mm to 0.2mm, and the frame thickness is 0.15mm to 0.5mm. This ensures that the frame's hardness is not less than 160 and the cover's hardness is not greater than the frame's hardness. This satisfies both the battery casing thickness and hardness requirements, thus meeting the requirements for a thinner and lighter battery design. Attached Figure Description

[0034] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are merely some implementation methods provided by the embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 is a schematic diagram of a battery casing provided in an embodiment of this disclosure;

[0036] Figure 2 is an exploded view of the battery casing in Figure 1;

[0037] Figure 3 is a schematic diagram of the frame in Figure 2;

[0038] Figure 4 is a schematic diagram of the structure of a cover plate in a battery casing provided in an embodiment of this disclosure;

[0039] Figure 5 is a schematic diagram of another cover plate in the battery casing provided in an embodiment of this disclosure;

[0040] Figure 6 is a schematic diagram of another battery casing provided in an embodiment of this disclosure;

[0041] Figure 7 is an exploded view of a battery provided in an embodiment of this disclosure.

[0042] Explanation of reference numerals in the attached drawings: 100-Battery; 120-Electrode core; 121-First electrode tab; 122-Second electrode tab; 130-Conductive component; 110-Battery casing; 111-Frame; 112-Cover plate; 113-Receiving cavity; 114-First cover plate; 115-Second cover plate; 116-Rounded corner; 117-Scratching. Detailed Implementation

[0043] The technical solutions of this disclosure will now be clearly and completely described with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0044] The following descriptions of the embodiments are with reference to the accompanying drawings, illustrating specific embodiments in which this disclosure can be implemented. Directional terms used in the description of this disclosure, such as "upper," "lower," "front," "rear," "left," "right," "inner," "outer," "top surface," "side surface," "bottom surface," "top wall," "side wall," "bottom wall," "inner side wall," "outer side wall," "length direction," "width direction," and "height direction," are merely for reference to the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of this disclosure, and do not indicate or imply that the referred device or element must have a specific orientation, or be constructed and operated in a specific orientation, and should not be construed as a limitation of this disclosure. In the description of this disclosure, terms such as "first," "second," "third," and "fourth," etc., are only used to distinguish the described objects and do not have any sequential or technical meaning. In the description of this disclosure, the terms "connection" and "linkage," unless otherwise specified, include both direct connection (linkage) and indirect connection (linkage).

[0045] In related technologies, to meet the requirements of thinner and lighter electronic product designs, the batteries used in these products need to be designed to be thinner and lighter as well. This necessitates that the battery casing thickness meet the requirements for thinner and lighter batteries, while also ensuring the required hardness of the battery casing. Specifically, the battery casing includes a first cover plate and a second cover plate disposed opposite each other, with a frame sandwiched between the first and second cover plates. To meet the thinner and lighter design requirements, the thickness of both the first and second cover plates needs to be 0.03 mm to 0.2 mm, and the thickness of the frame needs to be 0.15 mm to 0.5 mm. In addition to meeting the thickness requirements, the Vickers hardness of the frame also needs to be no less than 120, and the hardness of the first and second cover plates must not exceed the hardness of the frame. However, with current technology, while meeting the aforementioned thickness requirements, it is impossible to meet the hardness requirements of the battery casing.

[0046] Based on the aforementioned technical issues, the battery casing provided in this disclosure includes a frame and a cover plate. The cover plate is connected to the frame and encloses the frame to form a receiving cavity, which is used to receive the electrode core. The ratio of the hardness HV1 of the frame to the hardness HV2 of the cover plate is in the range of 1 ≤ HV1 / HV2 ≤ 3. When the ratio of the hardness HV1 of the frame to the hardness HV2 of the cover plate meets the above range, suitable materials can be selected to manufacture the frame and the cover plate, so that the thickness of the cover plate is 0.03 mm to 0.2 mm and the thickness of the frame is 0.15 mm to 0.5 mm. On this basis, the hardness of the frame is not less than 160 and the hardness of the cover plate is not greater than the hardness of the frame. In this way, while meeting the above thickness requirements, the hardness requirements of the battery casing are also met, thus meeting the requirements of thin and light battery design.

[0047] The contents of this disclosure will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can have a clearer and more detailed understanding of the contents of this disclosure.

[0048] The following provides a detailed description of the specific structure of the battery casing and various possible implementation methods.

[0049] Figure 1 is a structural schematic diagram of a battery housing 110 provided in an embodiment of this disclosure, Figure 2 is an exploded view of the battery housing 110 in Figure 1, and Figure 3 is a structural schematic diagram of the frame 111 in Figure 2.

[0050] Referring to Figures 1, 2, and 3, the battery casing 110 includes a frame 111 and at least one cover plate 112. The frame 111 has at least one opening. The cover plate 112 closes the opening to form a receiving cavity 113, which is adapted to receive the electrode core 120. The ratio of the hardness HV1 of the frame 111 to the hardness HV2 of the cover plate 112 is in the range of 1 ≤ HV1 / HV2 ≤ 3.

[0051] In this embodiment, the battery casing 110 includes a frame 111 and a cover plate 112. The cover plate 112 is connected to the frame 111 and encloses the frame 111 to form a receiving cavity 113, which is suitable for accommodating the electrode core 120. Thus, the battery casing 110 can protect the electrode core 120, preventing it from being damaged externally, thereby extending the service life of the battery 100. When the receiving cavity 113 is a sealed receiving cavity, it can seal the electrode core 120.

[0052] The ratio of the hardness HV1 of the frame 111 to the hardness HV2 of the cover plate 112 is within the range of 1 ≤ HV1 / HV2 ≤ 3. When the ratio of the hardness HV1 of the frame 111 to the hardness HV2 of the cover plate 112 meets the above range, technicians, through multiple experiments, can select suitable materials to manufacture the frame 111 and the cover plate 112, thereby manufacturing a battery casing 110. The thickness of the cover plate 112 of the battery casing 110 is 0.03mm to 0.2mm, and the thickness of the frame 111 is 0.15mm to 0.5mm. Based on this, the hardness of the frame 111 is not less than 160, and the hardness of the cover plate 112 is not greater than the hardness of the frame 111. In this way, the thickness requirement of the battery casing 110 is met, as well as the hardness requirement of the battery casing 110, thus meeting the requirements of the thin and light design of the battery 100.

[0053] As an optional implementation, referring to Figures 1, 2 and 3, the thickness D of the cover plate 112 is in the range of 0.03mm≤D≤0.5mm.

[0054] This satisfies the thickness requirements of the battery casing 110, and thus meets the requirements for a thinner and lighter battery design.

[0055] As an optional implementation, referring to Figures 1, 2 and 3, the tensile strength Rm of the cover plate 112 is in the range of 200MPa≤Rm≤1500MPa.

[0056] When the tensile strength Rm of the cover plate 112 meets the above-mentioned value range, the thickness D of the cover plate 112 can meet the value range of 0.03mm≤D≤0.5mm, and at the same time, it can also meet the corresponding hardness requirements of the cover plate 112.

[0057] As an optional implementation, referring to Figures 1, 2 and 3, the thickness D3 of the frame 111 is in the range of 0.15mm≤D3≤0.5mm.

[0058] This satisfies the thickness requirements of the battery casing 110, and thus meets the requirements for a thinner and lighter battery design.

[0059] As an optional implementation, referring to Figures 1, 2 and 3, the hardness HV1 of the frame 111 has a range of HV1≥160.

[0060] When the hardness HV1 of the frame 111 meets the above-mentioned value range, the thickness D3 of the frame 111 can meet the value range of 0.15mm≤D3≤0.5mm. At the same time, it can also meet the strength requirements of the frame 111, thus meeting the requirements of the thin and light design of the battery 100.

[0061] As an optional implementation, referring to Figures 1, 2 and 3, the tensile strength Rm3 of the frame 111 is in the range of 200MPa≤Rm3≤1500MPa.

[0062] When the tensile strength Rm3 of the frame 111 meets the above-mentioned value range, the thickness D3 of the frame 111 can meet the value range of 0.15mm≤D3≤0.5mm, and at the same time, it can also meet the corresponding hardness requirements of the frame 111.

[0063] As an alternative implementation, referring to Figures 1, 2 and 3, the frame 111 includes a plurality of sidewalls, at least two adjacent sidewalls being formed by bending.

[0064] Specifically, the frame 111 has 0 to 3 seams. That is, the frame 111 has no seams or has one to three seams.

[0065] As an optional implementation, referring to Figures 1, 2 and 3, when two adjacent sidewalls are formed by bending, a fillet 116 is provided between the two adjacent sidewalls, and the radius R of the fillet 116 is in the range of R≥0.5mm.

[0066] Because a rounded corner 116 is provided between two adjacent sidewalls, when the corners of the frame 111 are subjected to external impact, the rounded corner 116 can disperse the stress, thereby preventing cracks from appearing at the corners. Compared to a design without rounded corners 116, providing rounded corners 116 to the corners of the frame 111 makes the corners of the battery casing 110 less prone to damage during transportation. Furthermore, when assembling the battery 100 using the battery casing 110, it prevents the corners of the battery casing 110 from scratching operators, thus improving the safety of the battery casing 110.

[0067] Since the radius R of the fillet 116 is within the range of R≥0.5mm, the fillet 116 has little impact on the appearance of the battery casing 110, thus making the battery casing 110 more aesthetically pleasing.

[0068] It should be noted that the rounded corner 116 can be formed in one step when casting the battery casing 110, or it can be formed by grinding after casting. This disclosure does not limit this.

[0069] As an optional implementation, referring to Figures 1, 2, and 3, the multiple sidewalls are formed by bending. That is, the frame 111 is a single piece, and the frame 111 has no seams.

[0070] When the frame 111 is seamless, it is formed by bending an annular plate. This increases the strength of the frame 111, and thus increases the strength of the battery casing 110.

[0071] As an optional implementation, referring to Figures 1, 2 and 3, the frame 111 has one seam.

[0072] When the frame 111 has a seam, the frame 111 is formed by bending a titanium alloy sheet and then welding the ends together. This reduces the number of seams in the frame 111 and increases its strength, which in turn increases the strength of the battery casing 110.

[0073] Furthermore, compared to a seamless design, when the frame 111 has a seam, it is easier to process the frame 111, thereby improving the production efficiency of the frame 111 and thus improving the production efficiency of the battery casing 110.

[0074] As an optional implementation, referring to Figures 1, 2, 3 and 4, the cover plate 112 is a rectangular plate.

[0075] Since the electrode core 120 is generally rectangular, when the cover plate 112 is rectangular, the resulting receiving cavity 113 can better fit the rectangular electrode core 120, thereby improving the assembly efficiency of the battery 100. It also facilitates the installation of the battery 100 into an electrical device.

[0076] In addition, the cover plate 112 can also be a polygonal plate or an irregularly shaped plate, and this embodiment does not limit it.

[0077] As an alternative implementation, referring to Figures 1, 2, 3 and 6, the cover plate 112 is a stepped plate.

[0078] This makes the cover plate 112 more resistant to bending stiffness, which in turn makes the cover plate 112 less prone to bending deformation, thereby increasing the stiffness of the battery casing 110.

[0079] As an optional implementation, referring to Figures 1, 2 and 3, there are two cover plates 112, and the frame 111 has two openings that are arranged opposite each other; the two cover plates respectively close the two openings to form a receiving cavity.

[0080] Specifically, the two cover plates 112 mentioned above are the first cover plate 114 and the second cover plate 115, respectively. The first cover plate 114 and the second cover plate 115 are identical in shape and size. The first side of the frame 111 is connected to the edge of the first cover plate 114, and the second side of the frame 111 is connected to the edge of the second cover plate 115.

[0081] This design gives the battery casing 110 two identical, oppositely positioned surfaces, making it more aesthetically pleasing. Furthermore, since the first side of the frame 111 is connected to the edge of the first cover plate 114, and the second side of the frame 111 is connected to the edge of the second cover plate 115, the first cover plate 114 and the second cover plate 115 do not protrude from the outer surface of the frame 111, resulting in a cleaner overall appearance for the battery casing 110.

[0082] Referring to Figures 1, 2, 3 and 5, when both the first cover plate 114 and the second cover plate 115 are irregularly shaped plates, the cell housing can be adapted to irregularly shaped electrode cores 120, and the irregularly shaped battery 100 can be adapted to different installation spaces, thereby making it easier to install the battery 100.

[0083] As an alternative implementation, in some embodiments, referring to Figures 1, 2 and 3, the two cover plates 112 are arranged in parallel.

[0084] This makes the battery casing 110 more aesthetically pleasing, which in turn makes the battery 100 more aesthetically pleasing, and also makes it easier to install the battery 100 into an electrical device.

[0085] As an optional implementation, referring to Figures 1, 2 and 3, the battery casing 110 is provided with a thinning portion.

[0086] The thinned portion is the thinnest and most prone to cracking compared to other parts of the battery casing 110. Thus, when the battery 100 is in use, the internal electrode core 120 expands, increasing its volume. This increases the tension in the battery casing 110. The stress at the thinned portion is the greatest compared to other parts of the battery casing 110, causing it to crack preferentially. This reduces the internal pressure of the battery 100, preventing an explosion and improving its safety.

[0087] As an optional implementation, referring to Figures 1, 2 and 3, the thinning portion is disposed on the cover plate 112.

[0088] Since the cover plate 112 has a larger area than the frame 111, it is easier to set the thinning part, thereby improving the setting efficiency of the thinning part and thus improving the production efficiency of the battery casing 110.

[0089] The thinning portion can be a notch 117. When the battery casing 110 has a first cover plate 114 and a second cover plate 115, the first cover plate 114 is provided with a notch 117. Thus, when the battery 100 is in use, if the internal electrode core 120 expands, causing its volume to increase, the tension on the first cover plate 114 will increase. The stress at the location of the notch 117 on the first cover plate 114 is the greatest compared to other locations on the first cover plate 114, and therefore it will crack preferentially, reducing the internal pressure of the battery 100 and preventing the battery 100 from exploding, thus improving the safety of the battery 100.

[0090] Meanwhile, the second cover plate 115 is provided with grooves 117. When the battery 100 is in use, if the internal electrode core 120 expands and its volume increases, the tension of the second cover plate 115 will increase. The stress at the location of the grooves 117 on the second cover plate 115 is the greatest compared to other locations on the second cover plate 115, so it will crack first, thereby reducing the internal pressure of the battery 100 and preventing the battery 100 from exploding, thus improving the safety of the battery 100.

[0091] As an optional implementation, referring to Figures 1, 2 and 3, both the frame 111 and the cover plate 112 are made of titanium alloy.

[0092] Specifically, when the battery casing 110 has a first cover plate 114 and a second cover plate 115, the first cover plate 114, the second cover plate 115, and the frame 111 are all made of titanium alloy. After multiple tests, it was found that when the materials of the first cover plate 114, the second cover plate 115, and the frame 111 are all titanium alloy, it is easier to meet the requirements for the thickness, hardness, and tensile strength of the first cover plate 114, the second cover plate 115, and the frame 111.

[0093] Because titanium is a lightweight and high-strength material, the weight of the battery casing 110 can be reduced, while its strength can be increased. Furthermore, since titanium manufacturing technology is relatively mature, using titanium alloys as the raw material for the first cover plate 114, the second cover plate 115, and the frame 111 can reduce the manufacturing cost of the battery casing 110 while meeting requirements for thickness, hardness, and tensile strength. In addition, titanium alloys are less susceptible to heat-affected zones during welding and are less prone to deformation. Therefore, the size and shape of the battery casing 110 are easier to control during production, thereby improving the manufacturing quality of the battery casing 110.

[0094] It should be noted that the tensile strength of the aforementioned titanium alloy material ranges from 200 MPa to 1500 MPa, the elongation is 5%-55%, the Vickers hardness is 100 to 350, and the density is 4.2 g / cm³. 3Up to 5.1 g / cm 3 The titanium alloy used in frame 111 has an elongation of ≥10%.

[0095] It should also be noted that, in addition to titanium metal, the above-mentioned titanium alloy materials may contain one or more other metals such as aluminum, vanadium, iron, chromium, nickel, and copper. The above-mentioned titanium alloys can be industrially pure titanium alloys.

[0096] As an optional implementation, referring to Figures 1, 2 and 3, the thickness D3 of the frame 111 is in the range of 0.15mm≤D3≤0.25mm.

[0097] This makes it easier to meet the thickness requirements of the frame 111, which is beneficial for the thinner and lighter design of the battery casing 110.

[0098] As an optional implementation, referring to Figures 1, 2 and 3, the tensile strength Rm3 of the frame 111 is in the range of Rm3≥600MPa.

[0099] This ensures that the thickness D3 of the frame 111 is within the range of 0.15mm≤D3≤0.25mm, while also guaranteeing the hardness requirements of the frame 111.

[0100] As an optional implementation, referring to Figures 1, 2 and 3, the range of the ratio of the hardness HV1 of the frame 111 to the hardness HV2 of the cover plate 112 is: 1.2≤HV1 / HV2≤3.

[0101] When the ratio of the hardness HV1 of the frame 111 to the hardness HV2 of the cover plate 112 meets the above-mentioned range, technicians can manufacture a battery casing 110 after multiple experiments. The cover plate 112 of the battery casing 110 has a thickness of 0.03mm to 0.2mm, and the frame 111 has a thickness of 0.15mm to 0.5mm. Based on this, the hardness of the frame 111 is not less than 160, and the hardness of the cover plate 112 is not greater than the hardness of the frame 111.

[0102] Furthermore, compared to setting the ratio of the hardness HV1 of the frame 111 to the hardness HV2 of the cover plate 112 in the range of 1≤HV1 / HV2≤3, the ratio of the hardness HV1 of the frame 111 to the hardness HV2 of the cover plate 112 is larger, that is, the hardness HV1 of the frame 111 is much larger than the hardness HV2 of the cover plate 112, which makes the structure of the battery casing 110 more stable.

[0103] As an alternative implementation, referring to Figures 1, 2 and 3, the number of cover plates 112 can also be multiple, and the multiple cover plates 112 and the frame 111 enclose and form a receiving cavity 113.

[0104] Compared to the solution of connecting a single cover plate 112 to the frame 111, when there are multiple cover plates 112, the multiple cover plates 112 can form a sealed cavity 113 with the frame 111. This can seal the electrode core 120, prevent external dust and liquid from contaminating the electrode core 120, and thus better protect the electrode core 120, thereby extending the service life of the battery 100.

[0105] It should be noted that the number of cover plates 112 can be two, three or more, and this embodiment does not limit this.

[0106] This disclosure also provides a battery 100, as shown in Figures 1, 2, 3 and 7. The battery 100 includes any of the above-described battery casings 110 and electrode cores 120, with the electrode cores 120 housed in a receiving cavity 113.

[0107] Since the battery casing 110 includes a frame 111 and a cover plate 112, the cover plate 112 is connected to the frame 111 and encloses the frame 111 to form a receiving cavity 113, which is used to receive the electrode core 120. The ratio of the hardness HV1 of the frame 111 to the hardness HV2 of the cover plate 112 is in the range of 1 ≤ HV1 / HV2 ≤ 3. When the ratio of the hardness HV1 of the frame 111 to the hardness HV2 of the cover plate 112 meets the above range, technicians can select suitable materials to make the frame 111 and the cover plate 112 through multiple experiments, and thus a battery casing 110 can be manufactured. The cover plate 112 of the battery casing 110 has a thickness of 0.03mm to 0.2mm, and the frame 111 has a thickness of 0.15mm to 0.5mm. This allows the frame 111 to have a hardness of not less than 160, and the cover plate 112 to have a hardness not greater than that of the frame 111. This satisfies both the thickness and hardness requirements of the battery casing 110. Consequently, the battery 100 can achieve a slim and lightweight design while also meeting the structural strength and hardness requirements.

[0108] As an optional implementation, referring to Figures 1, 2, 3 and 7, the battery casing 110 is electrically connected to the electrode core 120.

[0109] In this way, excess static charge on the electrode core 120 can be transferred to the battery casing 110, and then the battery casing 110 conducts the excess static charge to the ground. This reduces the accumulation of static electricity in the battery 100, preventing static electricity from interfering with the use of electrical devices. In addition, it also enhances the electromagnetic compatibility of the battery 100, preventing the electrical device from being affected by electromagnetic interference from the battery 100, thereby improving the anti-interference capability of the electrical device and making the operation of the electrical device more stable and reliable.

[0110] As an optional implementation, referring to Figures 1, 2, 3, and 7, the battery 100 includes a conductive element 130, and the electrode core 120 is provided with a first tab 121 and a second tab 122. Both the conductive element 130 and the first tab 121 are insulated from the battery casing 110; the first tab 121 is electrically connected to the conductive element 130, and the second tab 122 is electrically connected to the battery casing 110.

[0111] In this way, excess static charge on the electrode core 120 can be transferred to the battery casing 110 through the second tab 122. Since both the conductive element 130 and the first tab 121 are insulated from the battery casing 110, the first tab 121 and the conductive element 130 are electrically connected. This ensures that the battery 100 can form a closed circuit with external electrical equipment, while also preventing short circuits between the first tab 121 and the second tab 122, thus improving the safety of the battery 100.

[0112] It should be noted that the aforementioned electrode core 120 includes a positive electrode sheet, a negative electrode sheet, and a separator stacked together. One end of the electrode core 120 is provided with a first electrode tab 121 and a second electrode tab 122 with opposite polarities. The aforementioned conductive element 130 is a pole post.

[0113] As an optional implementation, referring to Figures 1, 2, 3 and 7, the conductive element 130 passes through the battery housing 110.

[0114] In this way, the battery casing 110 can limit the conductive component 130, thereby making the structure of the battery 100 more stable.

[0115] As an optional implementation, referring to Figures 1, 2, 3 and 7, the conductive element 130 passes through the frame 111.

[0116] Since the frame 111 is harder than the cover plate 112, compared with the solution of passing the conductive element 130 through the cover plate 112, passing the conductive element 130 through the frame 111 makes the positional change of the conductive element 130 smaller, thus further enhancing the structural stability of the battery 100.

[0117] As an optional implementation, referring to Figures 1, 2, 3 and 7, the first end of the conductive element 130 protrudes from the outer surface of the battery casing 110, and the second end of the conductive element 130 is electrically connected to the first tab 121.

[0118] This facilitates the electrical connection of the conductive component 130 to external electrical equipment.

[0119] As an optional implementation, referring to Figures 1, 2, 3 and 7, the first electrode 121 is the positive electrode and the second electrode 122 is the negative electrode.

[0120] The negative electrode of the core 120 is directly connected to the battery casing 110, which avoids the risk of electric shock to technicians when installing the battery 100, thus making the installation of the battery 100 safer.

[0121] This disclosure also provides an electrical device, which includes the battery 100 described above.

[0122] Since the battery casing 110 includes a frame 111 and a cover plate 112, the cover plate 112 is connected to the frame 111 and encloses the frame 111 to form a receiving cavity 113, which is used to receive the electrode core 120. The ratio of the hardness HV1 of the frame 111 to the hardness HV2 of the cover plate 112 is in the range of 1 ≤ HV1 / HV2 ≤ 3. When the ratio of the hardness HV1 of the frame 111 to the hardness HV2 of the cover plate 112 meets the above range, technicians can select suitable materials to make the frame 111 and the cover plate 112 through multiple experiments, and thus a battery casing 110 can be manufactured. The cover plate 112 of the battery casing 110 has a thickness of 0.03mm to 0.2mm, and the frame 111 has a thickness of 0.15mm to 0.5mm. This allows the frame 111 to have a hardness of not less than 160, and the cover plate 112 to have a hardness no greater than that of the frame 111. This satisfies both the thickness and hardness requirements of the battery casing 110. Consequently, the battery 100 meets both structural strength and hardness requirements while also being thinner and lighter. This facilitates the design of thinner and lighter electrical devices when this battery 100 is installed, thus improving the user experience.

[0123] It should be noted that the aforementioned electrical device may be a mobile phone, watch, tablet computer, or laptop computer, or other electrical devices, and this disclosure does not limit the specific type of device.

[0124] The above are some embodiments of this disclosure. It should be noted that those skilled in the art can make several improvements and modifications without departing from the principles of this disclosure, and these improvements and modifications are also considered to be within the scope of protection of this disclosure.

Claims

1. A battery casing, characterized in that, include: A frame (111) having at least one opening; At least one cover plate (112) closes the opening to form a receiving cavity (113) adapted to receive the electrode core (120); the ratio of the hardness HV1 of the frame (111) to the hardness HV2 of the cover plate (112) is in the range of 1≤HV1 / HV2≤3.

2. The battery casing according to claim 1, characterized in that, The thickness D of the cover plate (112) is in the range of 0.03mm≤D≤0.5mm.

3. The battery casing according to claim 1, characterized in that, The tensile strength Rm of the cover plate (112) is in the range of 200MPa≤Rm≤1500MPa.

4. The battery casing according to claim 1, characterized in that, The thickness D3 of the frame (111) has a range of 0.15mm≤D3≤0.5mm.

5. The battery casing according to claim 1, characterized in that, The hardness HV1 of the frame (111) has a range of values: HV1≥160.

6. The battery casing according to claim 1, characterized in that, The tensile strength Rm3 of the frame (111) is in the range of 200MPa≤Rm3≤1500MPa.

7. The battery casing according to claim 1, characterized in that, The frame (111) includes multiple sidewalls, at least two of which are formed by bending.

8. The battery casing according to claim 7, characterized in that, When the two adjacent sidewalls are formed by bending, a rounded corner (116) is provided between the two adjacent sidewalls, and the radius R of the rounded corner (116) is in the range of R≥0.5mm.

9. The battery casing according to claim 7, characterized in that, The multiple sidewalls are formed by bending.

10. The battery casing according to claim 9, characterized in that, The frame (111) has one seam.

11. The battery casing according to any one of claims 1-10, characterized in that, The cover plate (112) is a rectangular plate.

12. The battery casing according to any one of claims 1-11, characterized in that, The cover plate (112) is a stepped plate.

13. The battery casing according to any one of claims 1-12, characterized in that, The number of the cover plates (112) is two, and the frame (111) has two openings arranged opposite to each other; The two cover plates respectively close the two openings to form the receiving cavity.

14. The battery casing according to claim 13, characterized in that, The two cover plates (112) are arranged in parallel.

15. The battery casing according to any one of claims 1-14, characterized in that, The battery casing (110) is provided with a thinning section.

16. The battery casing according to claim 15, characterized in that, The thinning portion is disposed on the cover plate (112).

17. The battery casing according to any one of claims 1-16, characterized in that, The frame (111) and the cover plate (112) are both made of titanium alloy.

18. The battery casing according to claim 17, characterized in that, The thickness D3 of the frame (111) has a range of 0.15mm ≤ D3 ≤ 0.25mm.

19. The battery casing according to claim 17, characterized in that, The tensile strength Rm3 of the frame (111) has the following range: Rm3≥600MPa.

20. The battery casing according to any one of claims 1-19, characterized in that, The range of the ratio of the hardness HV1 of the frame (111) to the hardness HV2 of the cover plate (112) is: 1.2≤HV1 / HV2≤3.

21. A battery, characterized in that, The battery includes the battery housing (110) according to any one of claims 1-20 and the electrode core (120), wherein the electrode core (120) is housed in the receiving cavity (113).

22. An electrical appliance, characterized in that, Includes the battery (100) as described in claim 19.

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