Battery and battery pack

Abstract

The utility model relates to battery technology field discloses battery and battery package, include: shell, including casing and cover plate body, the casing has at least one opening, the cover plate body sets up and is connected with the casing correspondingly the opening, the casing and the cover plate body are enclosed and form the accommodation space, the casing and the cover plate body are all three series aluminum alloy material, pole group, set up correspondingly the accommodation space, the utility model chooses the same material with the casing and the cover plate, the welding of casing and cover plate is convenient, guarantees the welding quality, improves the welding yield.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to batteries and battery packs. Background Technology

[0002] Due to their advantages such as high energy density, high power density, high cycle life, and long storage time, power batteries have been widely used in computers, mobile phones, and other fields. Furthermore, with the maturity of manufacturing technology, they have broad application prospects in electric vehicles such as electric bicycles and electric cars, as well as energy storage facilities. The widespread application of power batteries can effectively solve global problems such as environmental pollution and the energy crisis. A battery typically consists of a casing, a battery cover, and electrode arrays. The casing and battery cover are welded together to encapsulate the electrode arrays. However, in existing technologies, poor welding of the casing and battery cover still exists. Utility Model Content

[0003] In view of this, the present invention provides a battery and battery pack to solve the problem of poor welding of the casing and battery cover in the prior art.

[0004] In a first aspect, the present invention provides a battery, comprising: a casing, including a housing and a cover plate body, the housing having at least one opening; the cover plate body being disposed corresponding to the opening and connected to the housing, the housing and the cover plate body enclosing and forming an accommodating space; both the housing and the cover plate body being made of ternary aluminum alloy; and an electrode assembly disposed corresponding to the accommodating space.

[0005] Beneficial effects: Using the same material for the shell and cover facilitates welding of the shell and cover, ensures welding quality, and improves welding yield.

[0006] In one alternative embodiment, both the housing and the cover plate body are made of 3003 aluminum alloy.

[0007] In one optional embodiment, the battery further includes a terminal body, and the housing and / or the cover plate body have terminal holes, the terminal body being inserted into the terminal holes and electrically connected to the electrode group.

[0008] In one optional embodiment, the electrode body includes a positive electrode, which is made of aluminum alloy; and / or, the electrode body includes a negative electrode, which is made of copper or a copper-aluminum composite material.

[0009] In one alternative embodiment, the positive electrode post is made of 1060 aluminum alloy; and / or, the negative electrode post is made of CUT2, or a composite material of 1060 aluminum alloy and CUT2.

[0010] Beneficial effects: The positive electrode post is made of 1060 aluminum alloy, which is easy to process and cold heading, and can reduce processing costs; the negative electrode post is made of CUT2 material, which is easy to process; the negative electrode post is made of a composite material of 1060 aluminum alloy and CUT2, which is easy to form a composite structure by friction welding or processing under high temperature and high pressure.

[0011] In one alternative embodiment, the battery further includes a first insulating member disposed on the outer side of the housing, the first insulating member being located between the terminal body and the housing.

[0012] Beneficial effect: The first insulating element provides insulation between the pole body and the outer casing.

[0013] In one optional embodiment, the first insulating element includes a positive electrode insulating element located between the positive electrode post and the outer casing, the positive electrode insulating element being a conductive material and having a predetermined resistance value; or, the positive electrode insulating element being an insulating material with a resistance of not less than 200 MΩ; and / or, the first insulating element further includes a negative electrode insulating element located between the negative electrode post and the outer casing, the negative electrode insulating element being an insulating material with a resistance of not less than 200 MΩ.

[0014] Beneficial effects: The insulating component on the positive terminal protects the battery in the event of a short circuit at the negative terminal. The insulating component on the negative terminal also prevents corrosion of the casing.

[0015] In one optional embodiment, the battery further includes a support ring, one end of which is connected to the outer casing, and the other end of which is spaced apart from the outer wall of the terminal body. The support ring has a through-hole, and the first insulating member fills the hole and the gap between the support ring and the terminal body. The support ring is made of 3003 aluminum alloy. Alternatively, the battery further includes a riveting block, which is connected to the terminal body. The first insulating member is disposed between the riveting block and the outer surface of the outer casing. The riveting block is made of 1060 aluminum alloy.

[0016] Beneficial effects: Using the same material for the support ring and the outer shell facilitates welding, ensures welding quality, and improves welding yield. The riveting block is made of 1060 aluminum alloy, which facilitates stamping and allows for the removal of metal wires from the surface of the riveting block using a vibratory polishing process.

[0017] In one optional embodiment, the battery further includes a second insulating member disposed between the inner side of the housing and the electrode assembly, the second insulating member being an insulating material and having an insulation resistance of not less than 200 MΩ; and / or, the battery further includes a sealing member disposed between the terminal body and the housing.

[0018] Beneficial effects: By incorporating a second insulating element, direct contact between the outer casing and the electrode assembly is prevented from posing a safety risk. The use of a sealing element effectively achieves a seal between the electrode post body and the outer casing.

[0019] Secondly, this utility model also provides a battery pack, including the aforementioned battery. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the battery cover plate according to Embodiment 1 of this utility model; Figure 2 for Figure 1 A top view of the battery cover shown; Figure 3 for Figure 2 A cross-sectional view along the AA direction; Figure 4 for Figure 3 A partially enlarged structural diagram; Figure 5 This is a schematic diagram of the battery cover plate according to Embodiment 2 of this utility model; Figure 6 for Figure 5 A top view of the battery cover shown; Figure 7 for Figure 6 Cross-sectional view along the BB direction; Figure 8 for Figure 7 A partially enlarged structural diagram; Figure 9 This is a schematic diagram of the battery cover plate according to Embodiment 3 of this utility model; Figure 10 for Figure 9 A top view of the battery cover shown; Figure 11 for Figure 10A cross-sectional view along the CC direction; Figure 12 for Figure 11 A partially enlarged structural diagram; Figure 13 This is a schematic diagram of the positive electrode cover plate of Embodiment 4 of this utility model; Figure 14 for Figure 13 A top view of the positive electrode cover shown; Figure 15 for Figure 14 A cross-sectional view along the DD direction; Figure 16 for Figure 15 A partially enlarged structural diagram; Figure 17 This is a top view of the negative electrode cover plate of Embodiment 4 of this utility model; Figure 18 for Figure 17 The front view of the negative electrode cover shown; Figure 19 for Figure 17 Cross-sectional view along the EE direction; Figure 20 for Figure 19 A partially enlarged structural diagram.

[0022] Explanation of reference numerals in the attached figures: 1. Cover plate body; 2. Pole post body; 21. Positive pole post; 22. Negative pole post; 3. First insulating component; 31. Upper insulating component for positive pole; 32. Upper insulating component for negative pole; 4. Support ring; 5. Riveting block; 6. Second insulating component; 7. Sealing component. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] The following is combined with Figures 1 to 20 The following describes embodiments of the present invention.

[0025] According to an embodiment of the present invention, a battery is provided, comprising: a casing and an electrode assembly. The casing includes a housing and a cover plate body 1. The housing has at least one opening, and the cover plate body 1 is disposed corresponding to the opening and connected to the housing. The housing and the cover plate body 1 enclose a receiving space, and the electrode assembly is disposed corresponding to the receiving space. Both the housing and the cover plate body 1 are made of ternary aluminum alloy.

[0026] Using the same material for the shell and cover facilitates welding of the shell and cover, ensures welding quality, and improves welding yield.

[0027] Specifically, in one embodiment, both the housing and the cover body 1 are made of 3003 aluminum alloy.

[0028] In one embodiment, such as Figures 1 to 20 As shown, the battery also includes a terminal body 2, and the casing and / or cover plate body have terminal holes. The terminal body 2 is inserted into the terminal hole and electrically connected to the electrode group.

[0029] In one embodiment, such as Figures 1 to 3 , Figures 5 to 7 , Figures 9 to 11 as well as Figures 13 to 16 As shown, the electrode body 2 includes a positive electrode 21, which is made of aluminum alloy.

[0030] Specifically, in one embodiment, the positive electrode post 21 is made of 1060 aluminum alloy. Using 1060 aluminum alloy for the positive electrode post 21 facilitates machining and cold heading, thus reducing processing costs.

[0031] In one embodiment, such as Figures 1 to 3 , Figures 5 to 7 , Figures 9 to 11 as well as Figures 17 to 20 As shown, the electrode body 2 includes a negative electrode 22, which is made of copper or a copper-aluminum composite material.

[0032] Specifically, in one embodiment, the negative electrode post 22 is made of CUT2. Using CUT2 material for the negative electrode post 22 facilitates processing. Alternatively, the negative electrode post 22 is a composite material of 1060 aluminum alloy and CUT2. Using a composite material of 1060 aluminum alloy and CUT2 for the negative electrode post 22 facilitates the formation of a composite structure through friction welding or processing under high temperature and pressure.

[0033] In one embodiment, such as Figure 4 , Figure 8 , Figure 12 , Figure 16 and Figure 20As shown, the battery also includes a first insulating member 3, which is disposed on the outer side of the outer casing and is located between the terminal body 2 and the outer casing. The first insulating member 3 provides insulation between the terminal body 2 and the outer casing.

[0034] In one embodiment, such as Figure 3 , Figure 7 , Figure 11 and Figure 15 As shown, the first insulating component 3 includes a positive electrode upper insulating component 31, which is located between the positive electrode post 21 and the outer casing. The positive electrode upper insulating component 31 is made of a conductive material and has a predetermined resistance value; alternatively, the positive electrode upper insulating component 31 is made of an insulating material, and its resistance is not less than 200 MΩ. The positive electrode upper insulating component 31 serves to protect the battery in the event of a short circuit at the negative electrode.

[0035] Specifically, in one embodiment, the insulating element 31 on the positive electrode is made of conductive PPS material or insulating PPS material.

[0036] In one embodiment, such as Figure 3 , Figure 7 , Figure 11 and Figure 19 As shown, the first insulating component 3 also includes a negative electrode upper insulating component 32, which is located between the negative electrode post 22 and the outer casing. The negative electrode upper insulating component 32 is made of insulating material, and its resistance is not less than 200MΩ. The negative electrode upper insulating component 32 is used to prevent corrosion of the outer casing.

[0037] Specifically, in one embodiment, the insulating element 32 on the negative electrode is made of insulating PPS material.

[0038] In one embodiment, such as Figure 4 , Figure 8 , Figure 12 , Figure 16 and Figure 20 As shown, the battery also includes a second insulating component 6, which is disposed between the inner side of the outer casing and the electrode assembly. The second insulating component 6 is made of insulating material, and its insulation resistance is not less than 200MΩ. By providing the second insulating component 6, direct contact between the outer casing and the electrode assembly is prevented from causing safety risks.

[0039] Specifically, in one embodiment, the second insulating element 6 is made of insulating PP material.

[0040] In one embodiment, such as Figure 4 , Figure 8 , Figure 12 , Figure 16 and Figure 20As shown, the battery also includes a seal 7, which is sealed between the terminal body 2 and the outer casing. The seal 7 effectively seals the connection between the terminal body 2 and the outer casing.

[0041] Specifically, in one embodiment, the seal 7 is a sealing ring, typically made of fluororubber.

[0042] In one embodiment, such as Figure 7 and Figure 8 As shown, the battery also includes a support ring 4. One end of the support ring 4 is connected to the outer casing, and the other end of the support ring 4 is spaced apart from the outer wall of the terminal body 2. The support ring 4 has a through-hole, and the first insulating member 3 fills the hole and the gap between the support ring 4 and the terminal body 2. The support ring 4 is made of 3003 aluminum alloy. Making the support ring 4 and the outer casing of the same material facilitates welding of the support ring 4 and the outer casing, ensures welding quality, and improves welding yield.

[0043] In one embodiment, such as Figures 9 to 20 As shown, the battery also includes a riveting block 5, which is connected to the terminal body 2. A first insulating element 3 is provided between the riveting block 5 and the outer side of the outer casing. The riveting block 5 is made of 1060 aluminum alloy. The use of 1060 aluminum alloy for the riveting block 5 facilitates stamping and allows for the removal of metal wires from the surface of the riveting block 5 using a vibratory polishing process.

[0044] Example 1 like Figures 1 to 4 The illustrated minimalist battery cover has two terminal holes along its length. A positive terminal 21 and a negative terminal 22 correspond to the two terminal holes and penetrate the cover body 1. A first insulating member 3 is disposed between the outer surfaces of the terminal body 2 and the cover body 1, and between the terminal body 2 and the hole wall of the terminal hole. A sealing ring is disposed between the terminal body 2 and the cover body 1, including the portion of the first insulating member 3 between the terminal body 2 and the hole wall of the terminal hole, and the sealing ring of the cover body 1. A second insulating member 6 is fitted against the inner surface of the cover body 1, with the portion of the second insulating member 6 near the terminal hole extending between the inner surfaces of the terminal body 2 and the cover body 1.

[0045] Example 2 like Figures 5 to 8Another simplified battery cover shown has two terminal holes along its length. The positive terminal 21 and negative terminal 22 correspond to these two terminal holes and protrude from the outer surface of the cover body 1. The lower end of a support ring 4 is welded to the cover body 1, and the upper end of the support ring 4 is spaced apart from the outer wall of the terminal body 2. An opening is formed between the upper and lower ends of the support ring 4, penetrating the ring wall. A first insulating member 3 fills the opening and the gap between the support ring 4 and the terminal body 2. A sealing ring is positioned between the terminal body 2 and the cover body 1. A second insulating member 6 is fitted against the inner surface of the cover body 1. The sealing ring extends downwards into the terminal hole, and the second insulating member 6 extends upwards into the terminal hole, so that the sealing ring and the second insulating member 6 abut against each other. In other words, the sealing ring is compressed between the terminal body 2, the cover body 1, and the second insulating member 6.

[0046] Example 3 like Figures 9 to 12 The illustrated square battery cover has two terminal holes along its length. A positive terminal 21 and a negative terminal 22 are respectively positioned through these two holes. A riveting block 5 connects to the outer wall of the terminal body 2 and is spaced apart from the outer surface of the cover body 1. A first insulating member 3 is positioned between the riveting block 5 and the cover body 1, and between the terminal body 2 and the cover body 1. A second insulating member 6 is fitted to the inner surface of the cover body 1, extending from the terminal hole to the inner surface between the terminal body 2 and the cover body 1. A sealing ring is circumferentially arranged around the outer wall of the terminal body 2, and the first insulating member 3, the cover body 1, and the second insulating member 6 compress the sealing ring.

[0047] Example 4 like Figures 13 to 20 The illustration shows a blade battery cover plate, comprising two plates: a positive cover plate and a negative cover plate. Specifically, it comprises two cover plate bodies 1, one for mounting the positive terminal post 21 and the other for mounting the negative terminal post 22. The terminal post body 2 penetrates through the cover plate body 1. A riveting block 5 connects to the outer wall of the terminal post body 2 and is spaced apart from the outer surface of the cover plate body 1. A first insulating member 3 is disposed between the riveting block 5 and the cover plate body 1, and between the terminal post body 2 and the cover plate body 1. A second insulating member 6 is fitted to the inner surface of the cover plate body 1, with the portion of the second insulating member 6 near the terminal post hole extending between the inner surfaces of the terminal post body 2 and the cover plate body 1. A sealing ring is circumferentially arranged around the outer wall of the terminal post body 2, and the first insulating member 3, the cover plate body 1, and the second insulating member 6 compress the sealing ring.

[0048] According to an embodiment of the present invention, another aspect provides a battery pack including the battery described above.

[0049] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A battery, characterized in that, include: The housing includes a shell and a cover plate body, the shell having at least one opening; the cover plate body is disposed corresponding to the opening and connected to the shell, the shell and the cover plate body enclosing and forming an accommodating space; both the shell and the cover plate body are made of ternary aluminum alloy. The pole group is configured corresponding to the accommodating space.

2. The battery according to claim 1, characterized in that, Both the housing and the cover plate are made of 3003 aluminum alloy.

3. The battery according to claim 1 or 2, characterized in that, The battery also includes a terminal body, and the housing and / or the cover plate body have terminal holes. The terminal body is inserted into the terminal hole and electrically connected to the electrode group.

4. The battery according to claim 3, characterized in that, The electrode body includes a positive electrode, which is made of aluminum alloy; and / or, The electrode body includes a negative electrode, which is made of copper or a copper-aluminum composite material.

5. The battery according to claim 4, characterized in that, The positive electrode post is made of 1060 aluminum alloy; and / or, The negative electrode post is made of CUT2, or a composite material of 1060 aluminum alloy and CUT2.

6. The battery according to claim 4, characterized in that, The battery also includes a first insulating member, which is disposed on the outer side of the outer casing and is located between the terminal body and the outer casing.

7. The battery according to claim 6, characterized in that, The first insulating element includes a positive electrode insulating element located between the positive electrode post and the outer casing. The positive electrode insulating element is made of a conductive material and has a predetermined resistance value; or, the positive electrode insulating element is made of an insulating material and its resistance is not less than 200 MΩ; and / or, The first insulating component further includes a negative electrode upper insulating component, which is located between the negative electrode post and the outer shell. The negative electrode upper insulating component is made of insulating material and has a resistance of not less than 200MΩ.

8. The battery according to claim 6, characterized in that, The battery further includes a support ring, one end of which is connected to the outer casing, and the other end of which is spaced apart from the outer wall of the electrode body. The support ring has a through-hole, and the first insulating member fills the opening and the gap between the support ring and the electrode body. The support ring is made of 3003 aluminum alloy. Alternatively... The battery also includes a riveting block, which is connected to the electrode body. A first insulating element is provided between the riveting block and the outer side of the outer casing. The riveting block is made of 1060 aluminum alloy.

9. The battery according to claim 3, characterized in that, The battery further includes a second insulating component disposed between the inner side of the outer casing and the electrode assembly. The second insulating component is made of insulating material, and its insulation resistance is not less than 200 MΩ; and / or, The battery also includes a seal that is sealed between the terminal body and the outer casing.

10. A battery pack, characterized in that, The battery includes any one of claims 1 to 9.

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