Battery device

Abstract

The utility model relates to the technical field of batteries, and provides a battery device which comprises a battery and a temperature acquisition assembly, the battery comprises a battery shell, and the battery shell comprises a temperature acquisition part; the temperature acquisition assembly comprises a fixing piece, a circuit board and a temperature sensor, the fixing piece is welded to the temperature acquisition part, the circuit board comprises a connecting part, the connecting part is fixed to the side, away from the temperature acquisition part, of the fixing piece, and the temperature sensor is electrically connected to the side, away from the fixing piece, of the connecting part. According to the battery device provided by the invention, the installation stability of the temperature sensor can be improved on the premise of not changing the normal assembly sequence of the conducting bar and the circuit board, so that the detection accuracy of the temperature sensor can be improved.

Description

Technical Field

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

[0002] The battery device includes a temperature sensor, which is used to detect the temperature of the battery so as to manage the battery. However, in the related art, the structure of the battery device fixing the temperature sensor to the battery is relatively complicated.

[0003] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0004] The utility model provides a battery device which can solve the technical problem of complex fixing structure of a temperature sensor.

[0005] The battery unit includes:

[0006] A battery, comprising a battery housing, wherein the battery housing comprises a temperature collecting portion;

[0007] The temperature collection component includes a fixing part, a circuit board, and a temperature sensor. The fixing part is welded on the temperature collection part. The circuit board includes a connecting part. The connecting part is fixed to a side of the fixing part away from the temperature collection part. The temperature sensor is electrically connected to a side of the connecting part away from the fixing part.

[0008] The utility model welds the connection part with the temperature sensor fixed to the battery housing through a fixing piece. On the one hand, the battery device can stably fix the temperature sensor on the battery housing, thereby ensuring the accuracy of the temperature detected by the temperature sensor; on the other hand, the battery device can be assembled in the conventional conductive bar and circuit board assembly sequence (first assemble the conductive bar, then assemble the circuit board).

[0009] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to better understand the present disclosure, reference may be made to the embodiments shown in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, related elements or components may have different arrangements as known in the art. In addition, in the drawings, the same reference numerals represent the same or similar components in each drawing.

[0011] in:

[0012] Figure 1 It is a structural schematic diagram of an exemplary embodiment of a battery device disclosed in the present invention;

[0013] Figure 2 for Figure 1 An enlarged structural schematic diagram of a local area AA of the battery device shown;

[0014] Figure 3 A schematic structural diagram of another perspective of an exemplary embodiment of a battery device disclosed herein;

[0015] Figure 4 for Figure 2 A cross-sectional view of the battery device shown along the dashed line BB;

[0016] Figure 5 It is a schematic structural diagram of an exemplary embodiment of a battery device disclosed in the present invention.

[0017] Description of reference numerals:

[0018] 1. Battery; 10. Insulating member; 11. Battery housing; 111. Temperature acquisition unit; 2. Temperature acquisition assembly; 21. Fixing member; 211. Supporting member; 212. Welding member; 22. Circuit board; 221. Connecting member; 222. Main body; 223. Detecting member; 23. Temperature sensor; 4. First side surface; 61. First welding member; 62. Second welding member; 7. Frame; 8. Conductive bar. DETAILED DESCRIPTION

[0019] The following will be combined with the accompanying drawings in the exemplary embodiments of the present disclosure to clearly and completely describe the technical solutions in the exemplary embodiments of the present disclosure. The exemplary embodiments described herein are only for illustrative purposes and are not intended to limit the scope of protection of the present disclosure. Therefore, it should be understood that various modifications and changes can be made to the exemplary embodiments without departing from the scope of protection of the present disclosure.

[0020] In the description of the present disclosure, unless otherwise clearly specified and limited, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance; the term "plurality" refers to two or more; the term "and / or" includes any and all combinations of one or more associated listed items. In particular, reference to "the / the" object or "an" object is also intended to indicate one of a possible plurality of such objects.

[0021] Unless otherwise specified or explained, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, an electrical connection, or a signal connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances.

[0022] Further, in the description of the present disclosure, it should be understood that the directional words such as "upper", "lower", "inner", "outer" and the like described in the exemplary embodiments of the present disclosure are described at the angles shown in the accompanying drawings and should not be understood as limitations on the exemplary embodiments of the present disclosure. It should also be understood that, in the context, when it is mentioned that an element or feature is connected to one or more "upper", "lower", or "inner", "outer" of another element, it can not only be directly connected to the "upper", "lower", "inner", "outer" of another element or elements, but can also be indirectly connected to the "upper", "lower", "inner", "outer" of another element or elements through an intermediate element.

[0023] Figure 1 is a schematic structural diagram of an exemplary embodiment of a battery device disclosed herein. Figure 2 for Figure 1 The enlarged structural diagram of the local area AA of the battery device is shown. Figure 3 This is a structural schematic diagram of another perspective of an exemplary embodiment of the battery device disclosed herein. Figure 4 for Figure 2 The battery device is shown in a cross-sectional view along the dashed line BB.

[0024] The battery device includes: a battery 1 and a temperature collection component 2, wherein the battery 1 includes a battery housing 11, and the battery housing 11 includes a temperature collection portion 111; the temperature collection component 2 includes a fixing member 21, a circuit board 22, and a temperature sensor 23, wherein the fixing member 21 is welded to the temperature collection portion 111, and the circuit board 22 includes a connecting portion 221, which is fixed to a side of the fixing member 21 away from the temperature collection portion 111, and the temperature sensor 23 is electrically connected to a side of the connecting portion 221 away from the fixing member 21.

[0025] In this exemplary embodiment, the connection part with the temperature sensor fixed thereon is welded to the battery housing through a fixing member. On the one hand, the battery device can stably fix the temperature sensor on the battery housing, thereby ensuring the accuracy of the temperature detected by the temperature sensor; on the other hand, the battery device can be assembled in the conventional conductive bar and circuit board assembly sequence (conductive bar is assembled first, then circuit board is assembled).

[0026] In this exemplary embodiment, the circuit board 22 can transmit the temperature information detected by the temperature sensor 23 to the battery management system, and the battery management system can perform intelligent management on the battery according to the temperature information.

[0027] In this exemplary embodiment, Figure 1-4 As shown, the battery housing 11 includes a first side surface 4, and the temperature collection portion 111 is located on the first side surface 4; the orthographic projection of the temperature sensor 23 on the first side surface 4 is located within the orthographic projection of the connecting portion 221 on the first side surface 4, and the temperature sensor 23 can be stably fixed on the connecting portion 221. The orthographic projection of the connecting portion 221 on the first side surface 4 is located within the orthographic projection of the fixing member 21 on the first side surface 4, and the connecting portion 221 can also be stably fixed on the fixing member 21.

[0028] In this exemplary embodiment, the temperature sensor 23 may be welded or plugged onto the pin of the connection portion 221. The connection portion 221 and the fixing member 21 may be fixedly connected by welding, bonding, or the like.

[0029] In this exemplary embodiment, Figure 1-4 As shown, the fixing member 21 includes a supporting portion 211 and a welding portion 212; the orthographic projection of the supporting portion 211 on the first side surface 4 overlaps with the orthographic projection of the connecting portion 221 on the first side surface 4, and the supporting portion 211 is used to support and fix the connecting portion 221. The orthographic projection of the welding portion 212 on the first side surface 4 does not overlap with the orthographic projection of the connecting portion 221 on the first side surface 4; wherein at least part of the welding portion 212 is welded to the temperature collecting portion 111. In this exemplary embodiment, the fixing member 21 is welded to the temperature collecting portion 111 by the welding portion 212 that does not overlap with the connecting portion 221. This arrangement can ensure that the welding marks of the fixing member 21 and the temperature collecting portion 111 will not affect the temperature collected by the temperature sensor 23.

[0030] In this exemplary embodiment, Figure 1-4 As shown, the circuit board 22 also includes a main body 222, and the orthographic projection of the connecting portion 221 on the first side 4 is protruding from the orthographic projection of the main body 222 on the first side 4 along the first direction Y; the welding portion 212 includes a first welding portion 61 and a second welding portion 62, and the first welding portion 61 and the second welding portion 62 are connected to the opposite sides of the support portion 211 in the second direction X, and the second direction X is perpendicular to the first direction Y; the first welding portion 61 and the second welding portion 62 are respectively welded to the temperature collection portion 111. The first welding portion 61 and the second welding portion 62 spaced apart in the second direction X can stably weld the fixing member 21 to the temperature collection portion 111.

[0031] In this exemplary embodiment, Figure 1-4As shown, the temperature acquisition component 2 may further include: a frame 7, the frame 7 is fixed to the side of the connection portion 221 away from the fixing member 21, and the temperature sensor 23 is located in the area surrounded by the frame 7. The frame 7 can provide physical protection for the temperature sensor 23, thereby reducing the risk of the temperature sensor 23 being damaged by other structures. In this exemplary embodiment, the frame 7 may be rectangular, and it should be understood that in other exemplary embodiments, the frame 7 may also be circular, elliptical, or other irregular closed shapes. The frame 7 may be a plastic part, a metal part, or the like.

[0032] In this exemplary embodiment, Figure 1-4 As shown, the end surface of the surrounding frame 7 away from the connecting portion 221 can be protruded from the temperature sensor 23. This arrangement can enable the surrounding frame 7 to better protect the temperature sensor 23.

[0033] In this exemplary embodiment, Figure 1-4 As shown, the orthographic projection of the frame 7 on the first side surface 4 is located within the orthographic projection of the fixing member 21 on the first side surface 4. For example, the orthographic projection of the frame 7 on the first side surface 4 may be located within the orthographic projection of the connecting portion 221 on the first side surface 4. The area where the frame 7 is located is the area where the fixing member 21 is set, and the frame 7 will not affect the arrangement of other components in the battery device.

[0034] In this exemplary embodiment, Figure 1-4 As shown, the distance between the connecting portion 221 and the first side surface 4 is smaller than the distance between the main body 222 and the first side surface 4. That is, relative to the main body 222, the connecting portion 221 is recessed toward the side facing the first side surface 4. Accordingly, the upper end surfaces of the surrounding frame 7 and the temperature sensor 23 facing away from the first side surface 4 are also not disposed beyond the main body 222. The main body 222 can form a barrier to protect the surrounding frame 7 and the temperature sensor 23.

[0035] In this exemplary embodiment, Figure 1-4 As shown, the fixing member 21 can be a nickel sheet or an aluminum sheet. The nickel sheet has the characteristics of high strength and corrosion resistance. This setting can improve the structural stability of the temperature sensor 23. The aluminum sheet has high thermal conductivity.

[0036] In this exemplary embodiment, Figure 1-4 As shown, the battery device further includes: a conductive bar 8, which is used to electrically connect adjacent batteries 1. The conductive bar 8 can be used to connect multiple batteries in series or in parallel. At least part of the structure of the circuit board 22 is located on the side of the conductive bar 8 away from the battery 1. For example, Figure 1-4As shown, the circuit board 22 may further include a detection member 223, which is located on the side of the conductive bar 8 away from the battery 1, and may be used to detect battery voltage, current and other parameters. The battery device provided by this exemplary embodiment may be installed with the conductive bar first, and then with the circuit board.

[0037] In this exemplary embodiment, Figure 1-4 As shown, an insulating member 10 is provided on the side of the first side 4 facing the high temperature sensor 23. The insulating member 10 may be an insulating plate or an insulating film. An opening 9 is formed on the insulating member 10. The area of ​​the first side 4 exposed by the opening 9 forms a temperature collection portion 111. The temperature collection portion 111 is the portion of the battery to be collected.

[0038] In this exemplary embodiment, Figure 5 As shown, it is a schematic diagram of the structure of an exemplary embodiment of the battery device of the present disclosure. The battery 1 also includes a pressure relief structure 5 located on the first side 4, and the distance between the orthographic projection of the fixing member 21 and the temperature collection part 111 welded on the first side 4 and the orthographic projection of the pressure relief structure 5 on the first side 4 is greater than or equal to 5mm. For example, the distance between the orthographic projection of the fixing member 21 and the temperature collection part 111 welded on the first side 4 and the orthographic projection of the pressure relief structure 5 on the first side 4 can be equal to 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, etc. This setting can avoid the influence of the pressure relief structure 5 when the fixing member 21 and the temperature collection part 111 are welded.

[0039] It should be noted that the pressure relief structure 5 can be formed by a notch located on the first side surface 4. The notch can be a closed figure, for example, the notch can be a circle, a rectangle, a triangle, an irregular figure, etc. The notch can also be a non-closed figure, for example, the notch can be a "cross" shape, a "T" shape, an "X" shape, etc. The pressure relief structure 5 can also be a thinning area formed by stamping, the pressure relief structure can also be a thinning area of ​​the side wall itself where the first side surface is located, and the pressure relief structure 5 can also be a patch attached to the explosion-proof opening.

[0040] It should be noted that when the pressure relief structure 5 is a solid structure such as a patch or a thinned area, the orthographic projection of the patch or the thinned area on the projection surface is the orthographic projection of the pressure relief structure on the projection surface; when the pressure relief structure 5 is formed by a closed-shaped notch, the orthographic projection of the area enclosed by the closed-shaped notch on the projection surface is the orthographic projection of the pressure relief structure on the projection surface; when the pressure relief structure 5 is formed by a non-closed-shaped notch, the minimum circumscribed circle of the orthographic projection of the non-closed-shaped notch on the projection surface is the orthographic projection of the pressure relief structure on the projection surface.

[0041] In this exemplary embodiment, Figure 5As shown, the conductive bar 8 is arranged on the side of the battery 1 located at the first side surface 4; the distance between the orthographic projection of the fixing member 21 on the plane where the first side surface 4 is located and the orthographic projection of the conductive bar 8 on the plane where the first side surface 4 is located is greater than or equal to 12.5 mm. For example, the distance between the orthographic projection of the fixing member 21 on the plane where the first side surface 4 is located and the orthographic projection of the conductive bar 8 on the plane where the first side surface 4 is located can be equal to 12.5 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, etc. This arrangement can ensure that there is sufficient electrical clearance and creepage distance between the fixing member 21 and the conductive bar 8.

[0042] In this exemplary embodiment, the thickness of the fixing member 21 at a direction perpendicular to the first side surface 4 is 0.2 mm to 0.3 mm. For example, the thickness of the fixing member 21 at a direction perpendicular to the first side surface 4 may be 0.2 mm, 0.25 mm, 0.3 mm, etc. This arrangement can ensure that the fixing member 21 has sufficient strength and can also reduce the space occupied by the fixing member 21.

[0043] It should be noted that a battery includes a cell and an electrolyte, and a battery is the smallest unit capable of performing electrochemical reactions such as charge / discharge. A cell refers to a unit formed by winding or laminating a stacked portion, wherein the stacked portion includes a first pole sheet, a separator, and a second pole sheet. When the first pole sheet is a positive pole sheet, the second pole sheet is a negative pole sheet. The polarities of the first pole sheet and the second pole sheet can be interchanged. The first pole sheet and the second pole sheet are coated with an active material.

[0044] In this exemplary embodiment, the battery may be a lithium-ion battery. It should be understood that in other exemplary embodiments, the battery may also be a nickel-cadmium battery, a nickel-metal hydride battery, a lithium polymer battery, a sodium-ion battery, a solid-state battery, etc.

[0045] In this exemplary embodiment, the battery can be a square battery, that is, the battery can be a quadrangular prism-type battery. The quadrangular prism-type battery mainly refers to a battery with a prism shape, but it is not strictly limited whether each side of the prism must be a straight line in the strict sense, and the corners between the sides are not necessarily right angles, and can be arc transitions.

[0046] In other exemplary embodiments, the battery may be a cylindrical battery, and the battery case of the cylindrical battery may include two circular end surfaces and a curved surface located between the two circular end surfaces.

[0047] The battery can be a laminated battery, which is not only convenient to group, but also can be processed to obtain a longer battery. Specifically, the battery cell is a laminated battery cell, which has a first pole piece stacked on top of each other, a second pole piece with electrical properties opposite to the first pole piece, and a diaphragm sheet arranged between the first pole piece and the second pole piece, so that multiple pairs of first pole pieces and second pole pieces are stacked to form a laminated battery cell.

[0048] Alternatively, the battery may be a wound battery, that is, a first pole sheet, a second pole sheet with electrical properties opposite to the first pole sheet, and a diaphragm sheet arranged between the first pole sheet and the second pole sheet are wound to obtain a wound battery cell.

[0049] In this exemplary embodiment, the battery device is a battery module or a battery pack.

[0050] The battery module includes a plurality of batteries, which may be square batteries, and the battery module may further include end plates and side plates, which are used to fix the plurality of batteries. The batteries may be cylindrical batteries, which may be arranged on a support plate to form a battery module.

[0051] The battery pack includes a plurality of batteries and a box body, and the box body is used to fix the plurality of batteries.

[0052] It should be noted that the battery pack includes a battery, and the battery may be multiple, and the multiple batteries are arranged in the box. Among them, the multiple batteries can be installed in the box after forming a battery module. Alternatively, the multiple batteries can be directly arranged in the box, that is, there is no need to group the multiple batteries, and the box is used to fix the multiple batteries.

[0053] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing what is disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary technical means in the art that are not disclosed in the present disclosure. The specification and embodiments are to be considered merely as exemplary, and the true scope and spirit of the present disclosure are indicated by the claims.

[0054] The drawings in the present disclosure only relate to the structures involved in the present disclosure, and other structures may refer to the usual design. In the absence of conflict, the embodiments of the present disclosure and the features in the embodiments may be combined with each other to obtain new embodiments. It should be understood by those of ordinary skill in the art that the technical solutions of the present disclosure may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present disclosure, and should be included in the scope of the claims of the present disclosure.

[0055] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A battery device, characterized in that: The battery device comprises: A battery (1) comprises a battery housing (11), wherein the battery housing (11) comprises a temperature collecting portion (111); A temperature collection component (2), the temperature collection component (2) comprising a fixing component (21), a circuit board (22), and a temperature sensor (23), the fixing component (21) being welded to the temperature collection portion (111), the circuit board (22) comprising a connecting portion (221), the connecting portion (221) being fixed to a side of the fixing component (21) facing away from the temperature collection portion (111), and the temperature sensor (23) being electrically connected to a side of the connecting portion (221) facing away from the fixing component (21).

2. The battery device according to claim 1, characterized in that: The battery housing (11) comprises a first side surface (4), and the temperature collecting portion (111) is located on the first side surface (4); The orthographic projection of the temperature sensor (23) on the first side surface (4) is located within the orthographic projection of the connecting portion (221) on the first side surface (4); The orthographic projection of the connecting portion (221) on the first side surface (4) is located within the orthographic projection of the fixing member (21) on the first side surface (4).

3. The battery device according to claim 2, characterized in that: The fixing member (21) comprises a supporting portion (211) and a welding portion (212); The orthographic projection of the supporting portion (211) on the first side surface (4) overlaps with the orthographic projection of the connecting portion (221) on the first side surface (4), and the orthographic projection of the welding portion (212) on the first side surface (4) does not overlap with the orthographic projection of the connecting portion (221) on the first side surface (4); Wherein, at least a portion of the welding portion (212) is welded to the temperature collecting portion (111).

4. The battery device according to claim 3, characterized in that: The circuit board (22) further comprises a main body (222), and an orthographic projection of the connecting portion (221) on the first side surface (4) is arranged to protrude from an orthographic projection of the main body (222) on the first side surface (4) along a first direction; The welding portion (212) comprises a first welding portion (61) and a second welding portion (62), wherein the first welding portion (61) and the second welding portion (62) are connected to two opposite sides of the support portion (211) in a second direction, and the second direction is perpendicular to the first direction; The first welding portion (61) and the second welding portion (62) are respectively welded to the temperature collecting portion (111).

5. The battery device according to claim 1, characterized in that: The battery housing (11) comprises a first side surface (4), and the temperature collecting portion (111) is located on the first side surface (4); The battery (1) further comprises a pressure relief structure (5) located on the first side surface (4), and the distance between the orthographic projection of the fixing member (21) and the temperature collection portion (111) welded on the first side surface (4) and the orthographic projection of the pressure relief structure (5) on the first side surface (4) is greater than or equal to 5 mm.

6. The battery device according to claim 1, characterized in that: The battery housing (11) comprises a first side surface (4), and the temperature collecting portion (111) is located on the first side surface (4); The battery device further comprises: A conductive bar (8), the conductive bar (8) being used to electrically connect adjacent batteries (1), the conductive bar (8) being arranged on a side of the battery (1) located on the first side surface (4); The distance between the orthographic projection of the fixing member (21) on the plane where the first side surface (4) is located and the orthographic projection of the conductive bar (8) on the plane where the first side surface (4) is located is greater than or equal to 12.5 mm.

7. The battery device according to claim 1, characterized in that: The battery housing (11) comprises a first side surface (4), and the temperature collecting portion (111) is located on the first side surface (4); The thickness of the fixing member (21) perpendicular to the first side surface (4) is 0.2 mm-0.3 mm.

8. The battery device according to claim 1, characterized in that: The battery housing (11) comprises a first side surface (4), and the temperature collecting portion (111) is located on the first side surface (4); The circuit board (22) further comprises a main body (222), an orthographic projection of the connecting portion (221) on the first side surface (4) protrudes beyond an orthographic projection of the main body (222) on the first side surface (4), and a distance between the connecting portion (221) and the first side surface (4) is smaller than a distance between the main body (222) and the first side surface (4).

9. The battery device according to claim 1, characterized in that: The fixing member (21) is a nickel sheet or an aluminum sheet.

10. The battery device according to claim 1, characterized in that: The battery device further comprises: A conductive bar (8), the conductive bar (8) being used to electrically connect adjacent batteries (1), and at least a portion of the structure of the circuit board (22) being located on a side of the conductive bar (8) facing away from the battery (1).

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