Battery

Abstract

The utility model relates to the technical field of power batteries, particularly provides a battery, and aims to solve the problem that an insulating part of the conventional battery affects the installation of the battery. In order to achieve the purpose, the battery comprises a shell and an insulating part, the insulating part is arranged at the first end of the shell, and in the first direction, the size of the insulating part is smaller than that of the shell. In the arrangement process in the battery pack, the insulating part is not in contact with the adjacent batteries in the first direction, so that the batteries can be tightly arranged in the first direction, and the energy density of the battery pack is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, and specifically provides a battery. Background Art

[0002] With the development of technology, new energy vehicles have gradually become popular, and battery packs are a very important component of new energy vehicles.

[0003] The battery pack includes a plurality of batteries and a housing. The plurality of batteries are arranged in the housing and connected in series and parallel in the housing. An insulating member is arranged at the end of the battery to isolate the end of the battery from the housing of the battery pack to prevent the pole at the end of the battery from contacting the housing of the battery pack. However, in some cases, the insulating member may affect the installation between adjacent batteries in the battery pack, thereby affecting the energy density of the battery pack.

[0004] Therefore, there is an urgent need for a battery to solve the problem that the insulating parts of the existing batteries affect the installation of the batteries. Utility Model Content

[0005] The utility model aims to solve the above technical problem, that is, to solve the problem that the insulating parts of the existing batteries affect the installation of the batteries.

[0006] In a first aspect, the utility model provides a battery, comprising a shell and an insulating member, wherein the insulating member is arranged at a first end of the shell, and in a first direction, a size of the insulating member is smaller than a size of the shell; wherein the first direction is a thickness direction of the battery, the second direction is a length direction of the battery, and the third direction is a width direction of the battery.

[0007] In a specific embodiment of the above battery, in the first direction, the size of the insulating member is H1, and the size of the shell is H2, wherein 0.001≤H1 / H2≤0.99.

[0008] In a specific embodiment of the above battery, 20.1 mm ≤ H2 ≤ 1800.1 mm; and / or, 2 mm ≤ H1 ≤ 1799.1 mm.

[0009] In a specific embodiment of the above battery, two insulating members are provided and are respectively arranged on two end surfaces of the shell in the second direction.

[0010] In a specific embodiment of the above battery, in the third direction, a bending portion is provided at the end of the insulating member.

[0011] In a specific embodiment of the above-mentioned battery, the shell is provided with a pole, and the insulating member is provided with a first through hole through which the pole passes; and / or, the shell is provided with an explosion-proof valve, and the insulating member is provided with a second through hole opposite to the explosion-proof valve; and / or, the shell is provided with a liquid injection hole, and the insulating member is provided with a third through hole connected to the liquid injection hole.

[0012] In a specific embodiment of the above battery, the electrode is a positive electrode, a negative electrode or a voltage sampling electrode.

[0013] In a specific embodiment of the above battery, the shell is provided with a connecting portion, the insulating member is provided with a groove, and the connecting portion is received in the groove.

[0014] In a specific embodiment of the above-mentioned battery, the shell includes a first shell, a partition and a second shell arranged in a first direction, the connecting part includes a first connecting part provided on the first shell and a second connecting part provided on the second shell, and the first connecting part, the edge of the partition and the second connecting part are accommodated in the groove.

[0015] In a specific embodiment of the above battery, the outer surface of the shell is covered with an insulating film, and the edge of the insulating film is located between the insulating member and the shell.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The battery provided by the utility model includes a shell and an insulating member, wherein the insulating member is arranged at a first end of the shell, and in a first direction, the size of the insulating member is smaller than the size of the shell. During the arrangement process in the shell of the battery pack, the insulating member will not contact the adjacent batteries in the first direction, ensuring that the batteries can be closely arranged in the first direction, thereby improving the energy density of the battery pack.

[0018] Furthermore, a connecting portion is provided on the shell, and a groove is provided on the insulating member. The connecting portion is received in the groove. The insulating member can protect the connecting portion and reduce the possibility of damage to the connecting portion caused by external collision. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:

[0020] Figure 1 It is a schematic diagram of the explosion structure of the battery provided by the utility model;

[0021] Figure 2 It is a partial structural diagram of the battery provided by the utility model;

[0022] Figure 3 It is a cross-sectional view of the first example of the utility model;

[0023] Figure 4 It is a partial view of the first example section of the utility model;

[0024] Figure 5 It is a partial view of the second example cross section of the utility model;

[0025] Figure 6 It is a partial view of the third exemplary cross section of the utility model.

[0026] Description of reference numerals:

[0027] 1. Shell; 11. First shell; 111. First connection part; 12. Partition; 13. Second shell; 131. Second connection part; 14. Pole; 15. Explosion-proof valve; 16. Liquid injection hole; 2. Insulator; 21. Bend; 22. Groove; 23. First through hole; 24. Second through hole; 25. Third through hole; 3. Insulating film; X, second direction; Y, first direction; Z, third direction. DETAILED DESCRIPTION

[0028] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0029] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0030] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In order to solve the problem that the insulating parts of the existing batteries affect the installation of the batteries, the utility model provides a battery pack, which includes a battery and a shell. A plurality of batteries are arranged in the shell and are connected in series and parallel in the shell to form a required voltage.

[0032] Figure 1This is a schematic diagram of the explosion structure of the battery provided by the utility model. Figure 2 It is a partial structural diagram of the battery provided by the utility model.

[0033] like Figure 1 As shown, the battery includes a shell 1 and an insulating member 2. The insulating member 2 is arranged at the first end of the shell 1 in the second direction X, and the first end is either end of the shell 1 in the second direction X, that is, the insulating member 2 is arranged at either end or both ends of the shell 1 in the second direction X, and is generally connected by gluing. After the battery is installed in the shell, the insulating member 2 is located between the shell of the battery pack and the shell 1 of the battery, which can isolate the battery shell 1 from the shell of the battery pack to prevent the battery from leaking due to accidental contact with the shell.

[0034] In the specific example of the present invention, two insulating members 2 are provided, and are respectively located on two end surfaces of the housing 1 in the second direction X. Of course, without departing from the principle of the present invention, in other embodiments, only one insulating member 2 may be provided, and is located on one end surface of the housing 1 in the second direction X.

[0035] like Figure 1 and Figure 2 As shown, the housing 1 is provided with a pole 14, an explosion-proof valve 15 and a liquid injection hole 16 at the end of the second direction X. The pole 14 is one or more of a positive pole, a negative pole or a voltage sampling pole. When the insulating member 2 can cover the pole 14, a first through hole 23 for the pole 14 to pass through is provided on the insulating member 2. After passing through the first through hole 23, the pole 14 can be electrically connected to the circuit of the battery pack to ensure that the insulating member 2 does not affect the electrical connection of the battery. When the insulating member 2 can cover the explosion-proof valve 15, a second through hole 24 opposite to the explosion-proof valve 15 is provided on the insulating member 2. When the battery needs to be exhausted through the explosion-proof valve 15, the gas discharged from the explosion-proof valve 15 can be discharged through the second through hole 24 to ensure that the insulating member 2 does not affect the exhaust of the battery. When the insulating member 2 can cover the liquid injection hole 16, a third through hole 25 opposite to the liquid injection hole 16 is provided on the insulating member 2. The liquid injection device can inject electrolyte into the liquid injection hole 16 through the third through hole 25, ensuring that the insulating member 2 will not affect the liquid injection of the battery.

[0036] It should also be noted that the present invention has no restrictions on the position, number and shape of the first through hole 23, the second through hole 24 and the third through hole 25. After the insulating member 2 is installed, it is sufficient to ensure that the pole 14 can pass through the first through hole 23, the explosion-proof valve 15 is aligned with the second through hole 24, and the injection hole 16 is aligned with the third through hole 25.

[0037] Figure 3 It is a cross-sectional view of the first example of the utility model. Figure 4 It is a partial view of the first example section of the utility model.

[0038] like Figure 3 and Figure 4 As shown, in the first direction Y, the size of the insulating member 2 is H1, and the size of the housing 1 is H2. The size H1 of the insulating member 2 is smaller than the size H2 of the housing 1, and the insulating member 2 does not extend beyond the housing 1 in the first direction Y. During the battery arrangement process, the insulating member 2 does not contact the adjacent batteries in the first direction Y, ensuring that the batteries can be closely arranged in the first direction Y, thereby improving the energy density of the battery pack.

[0039] The size H1 of the insulating member 2 is smaller than the size H2 of the shell 1, which means that the insulating member 2 will not completely cover the shell 1 in the first direction Y, but only covers a portion of the shell 1 in the first direction Y. In the example of the present utility model, 0.001≤H1 / H2≤0.99, specifically, 20.1mm≤H2≤1800.1mm, 2mm≤H1≤1799.1mm. When the size H2 of the shell 1 is 1800.1mm and the size H1 of the insulating member 2 is 2mm, H1 / H2 is approximately equal to 0.001. In this case, the size of the insulating member 2 is the smallest, and there is no need to open the first through hole 23, the second through hole 24 or the third through hole 25 on the insulating member 2. On the premise of separating the shell 1 of the battery and the battery pack shell, the manufacturing cost of the insulating member 2 can be reduced, and an effective insulation effect can be achieved. When the size H2 of the shell 1 is 1800.1 mm and the size H1 of the insulating member 2 is 1799.1 mm, H1 / H2 is approximately equal to 0.99. In this case, the insulating member 2 has better protection for the battery end, reducing damage to the battery caused by external impact.

[0040] Regarding the size H1 of the insulating part 2 and the size H2 of the shell 1, it should be noted that the above parameters are only used as preferred implementations and are not specific limitations of the present invention. As long as the size H1 of the insulating part 2 is smaller than the size H2 of the shell 1, it should be included in the protection scope of the present invention.

[0041] In some embodiments, in the third direction Z, a bending portion 21 is provided at the end of the insulating member 2, and the bending portion 21 is bent toward the middle part of the battery along the second direction X. When the insulating member 2 is installed at the end of the battery along the second direction X, the bending portion 21 is attached to the end surface of the housing 1 along the third direction Z.

[0042] The housing 1 includes a first housing 11, a partition 12, and a second housing 13 arranged in a first direction Y, and the first housing 11 and the second housing 13 are glued and connected to the partition 12 to achieve sealing. Battery cells are arranged between the partition 12 and the first housing 11, and between the partition 12 and the second housing 13. A first connecting portion 111 is arranged on the side of the first housing 11 close to the partition 12, and the first connecting portion 111 exceeds the main part of the first housing 11 in both the second direction X and the third direction Z and is aligned with the partition 12. A second connecting portion 131 is arranged on the side of the second housing 13 close to the partition 12, and the second connecting portion 131 exceeds the main part of the first housing 11 in the second direction X and the third direction Z and is aligned with the partition 12. After the battery adopts this structure, during the packaging process, the battery cell can enter the shell from the first direction Y, the shell entry area is large, and the battery cell enters the shell 1, so that the shell entry efficiency of the battery cell is high; at the same time, due to the large shell entry area of ​​the battery cell, the possibility of the battery cell being damaged by collision with the shell 1 during the shell entry process is small, so that the yield rate of battery packaging can be effectively improved.

[0043] After the first connection part 111, the second connection part 131 and the partition 12 are aligned, they are combined at the end of the second direction X to form a connection part. A groove 22 is provided on the insulating member 2, and the groove 22 can accommodate the connection part. At this time, the insulating member 2 can cover the glued part of the first shell 11 and the partition 12 at the end of the second direction X and the glued part of the second shell 13 and the partition 12 at the end of the second direction X, so as to prevent the battery from being bumped at the end of the second direction X and damaging the glued surface of the battery at the end of the second direction X. When the insulating member 2 is at its smallest width, it only needs to protect the connection part.

[0044] In some cases, the outer surface of the shell 1 is covered with an insulating film 3. The insulating film 3 can protect the shell 1, and when the battery is squeezed or rubbed by the outside world, the shell 1 will not contact the outside world, so the shell 1 will not be directly damaged. At the same time, the insulating film 3 can also isolate external chemicals, so that the shell 1 is not easily contacted with external chemicals and chemically corroded. Through the above two points, the insulating film 3 can effectively protect the battery, reduce the damage to the battery by external factors, and thus extend the service life of the battery. The insulating film 3 is specifically a soft film, such as a PET blue film, which is attached to the outer surface of the shell 1 by gluing.

[0045] The outer surface of the shell 1 in the first direction Y and the third direction Z is completely wrapped with an insulating film 3. The edge of the insulating film 3 in the second direction X exceeds the end face of the shell 1, and the insulating film 3 that exceeds the end face of the shell 1 along the second direction X is folded inward to wrap a part of the end face of the shell 1 in the second direction X. The insulating member 2 is arranged on the outside of the insulating film 3, and the edge of the insulating film 3 is attached between the edge of the insulating member 2 and the end face of the shell 1 in the second direction X. At this time, the insulating film 3 and the insulating member 2 can completely cover the end face of the battery in the second direction X after being combined, and the battery is fully protected.

[0046] Figure 5 It is a partial view of the second example cross section of the utility model; Figure 6 It is a partial view of the third exemplary cross section of the utility model.

[0047] like Figure 5 As shown, on the end surface of the housing 1 along the second direction X, if the dimension H1 of the insulating member 2 in the first direction Y is large, the dimension of the insulating film 3 in the first direction Y can be set to be small, so as to ensure that the edge of the insulating film 3 fits between the edge of the insulating member 2 and the housing 1. Figure 6 As shown, on the end face of the shell 1 along the second direction X, if the dimension H1 of the insulating member 2 in the first direction Y is smaller, the dimension of the insulating film 3 along the first direction Y needs to be set larger to ensure that the edge of the insulating film 3 can fit between the edge of the insulating member 2 and the shell 1.

[0048] When the outer surface of the shell 1 is wrapped with the insulating film 3, the bending portion 21 of the insulating part 2 is also located on the outside of the insulating film 3. At this time, the bending portion 21 can protect a part of the insulating film 3, especially the insulating film 3 at the end corner of the shell 1 along the second direction X, thereby reducing the possibility of damage to the insulating film 3 at this location.

[0049] In summary, the battery provided by the utility model has the following advantages:

[0050] 1. During the arrangement process in the shell of the battery pack, the insulating member 2 can isolate the battery shell 1 from the shell of the battery pack to prevent the battery from leaking electricity due to accidental contact with the shell; in addition, in the first direction Y, since the size of the insulating member 2 is smaller than the size of the shell 1, and the insulating member 2 does not exceed the shell 1, the insulating member 2 will not contact the adjacent batteries in the first direction Y, ensuring that the batteries can be closely arranged in the first direction Y, thereby improving the energy density of the battery pack.

[0051] 2. The groove 22 provided on the insulating member 2 can accommodate the connection portion provided on the housing 1, thereby protecting the connection portion and reducing the possibility of damage to the connection portion caused by external collision.

[0052] Those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present application and form different embodiments. For example, in the claims of the present application, any one of the claimed embodiments may be used in any combination.

[0053] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A battery, characterized in that: The battery comprises a shell and an insulating member, wherein the insulating member is arranged outside a first end of the shell, and in a first direction, a size of the insulating member is smaller than a size of the shell; In the first direction, the size of the insulating member is H1, and the size of the housing is H2, wherein 0.001≤H1 / H2≤0.99; The first direction is a thickness direction of the battery.

2. The battery according to claim 1, characterized in that 20.1mm≤H2≤1800.1mm; and / or, 2mm≤H1≤1799.1mm.

3. The battery according to claim 1, characterized in that The insulating members are provided with two and are respectively arranged on two end surfaces of the housing in the second direction; The second direction is the length direction of the battery.

4. The battery according to claim 1, characterized in that In the third direction, the end of the insulating member is provided with a bending portion; The third direction is a width direction of the battery.

5. The battery according to claim 1, characterized in that The housing is provided with a pole, and the insulating member is provided with a first through hole through which the pole passes; and / or, The housing is provided with an explosion-proof valve, and the insulating member is provided with a second through hole opposite to the explosion-proof valve; and / or, The shell is provided with a liquid injection hole, and the insulating member is provided with a third through hole communicated with the liquid injection hole.

6. The battery according to claim 5, characterized in that The pole is a positive pole, a negative pole or a voltage sampling pole.

7. The battery according to claim 1, characterized in that The shell is provided with a connecting portion, the insulating member is provided with a groove, and the connecting portion is received in the groove.

8. The battery according to claim 7, characterized in that The shell includes a first shell, a partition and a second shell arranged in the first direction, the connecting part includes a first connecting part provided on the first shell and a second connecting part provided on the second shell, and the first connecting part, the edge of the partition and the second connecting part are accommodated in the groove.

9. The battery according to claim 1, characterized in that The outer surface of the shell is covered with an insulating film, and the edge of the insulating film is located between the insulating member and the shell.

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