Battery shell temperature collecting structure
By designing a battery housing temperature sampling structure including an inclined extension branch structure and a groove connection, the problem of temperature sampling failure caused by FPC tear is solved, and better safety performance and service life are achieved.
Patent Information
- Application Number
- CN202420766024.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-12
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2034-04-12
AI Technical Summary
In the existing lithium battery temperature extraction structure, FPC is prone to tear due to long-term use, resulting in the inability to normal temperature extraction, which poses safety hazards.
A battery housing temperature sampling structure is designed, including an FPC main body and a branch structure formed by the FPC main body. The second section of the branch structure extends inclinedly with respect to the surface of the FPC main body, and the rotation angle and groove structure are formed at the connection between the second section and the third section, and the third section is provided with a temperature sensor for contacting the battery housing.
With this structural design, the risk of damage to the temperature harness due to bending is reduced and the possibility of tearing at the connection is reduced, thereby improving safety performance and service life.
Smart Images
Figure CN222812479U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of battery manufacturing technology, and in particular to a battery casing temperature collection structure. Background Art
[0002] During the use of the battery, the temperature of the shell needs to be collected to determine the working status of the battery. At present, most lithium batteries use a low-voltage FPC structure to collect temperature. After long-term use, there is a possibility that the FPC may tear, resulting in abnormal temperature collection, which poses certain safety hazards. Utility Model Content
[0003] To this end, the present application proposes a battery casing temperature collection structure with long safety performance and effective service life.
[0004] The battery case temperature collection structure of some embodiments of the present application includes: an FPC main body and a branch structure extended from the FPC main body, the branch structure includes a first section, a second section and a third section connected in sequence, the first section is connected to the FPC main body, the second section extends obliquely relative to the surface of the FPC main body, the third section is arranged parallel to the FPC main body, the third section is provided with a temperature sensor, and the third section is used to abut against the battery case to collect the temperature of the battery case; wherein the width of the second section is smaller than the width of the third section, and along the width direction of the branch structure, the connection between the second section and the third section has a corner, and a groove structure is formed at the corner, and the groove structure occupies at least part of the space of the second section in the width direction.
[0005] According to some embodiments of the present application, the edge profile of the groove structure is a curve, and the groove structure smoothly transitions from the second section to the third section.
[0006] According to some embodiments of the present application, along the width direction of the branch structure, a groove structure is formed on both sides of the connection between the second section and the third section.
[0007] According to some embodiments of the present application, along the thickness direction of the branch structure, the two sides of the third section are respectively a first side and a second side, the first side is arranged facing the FPC body, and the second side is arranged away from the FPC body, and the battery shell temperature collection structure also includes: a heat conductor, which is thermally connected to the second side and is used to abut against the battery shell.
[0008] According to some embodiments of the present application, along the thickness direction of the branch structure, the two sides of the third section are respectively a first side and a second side, the first side is arranged facing the FPC body, and the second side is arranged away from the FPC body, and the battery casing temperature collection structure also includes: a protective frame, which is arranged around the temperature sensor and is arranged on the first side.
[0009] According to some embodiments of the present application, the protection frame includes an inner side wall, and along the width direction of the branch structure, the edge of the groove structure does not exceed the inner side wall.
[0010] According to some embodiments of the present application, the protective frame includes a bottom wall and an outer wall, the bottom wall is in contact with the first side, the outer wall is connected to the bottom wall, and a chamfered structure is formed at the connection between the outer wall and the bottom wall.
[0011] According to some embodiments of the present application, the radius of the chamfered structure is R, and the thickness of the protective frame is D, satisfying: 0.25≤R / D≤0.75.
[0012] According to some embodiments of the present application, the angle between the second section and the third section is θ, which satisfies: 10°≤θ≤60°.
[0013] According to some embodiments of the present application, along the width direction of the branch structure, the distance between the first section and the FPC body is L, satisfying: L≥2mm.
[0014] Compared with the prior art, this solution has the following beneficial effects:
[0015] In the battery casing temperature collection structure of the embodiment of the present application, the second section of the branch structure extends obliquely relative to the surface of the FPC body, which can reduce the risk of damage and failure of the temperature collection harness due to bending; the width of the second section is smaller than the width of the third section, and along the width direction of the branch structure, the connection between the second section and the third section has a corner and forms a groove structure, which can reduce the risk of damage and failure caused by tearing at this location, thereby having better safety performance and a longer effective service life.
[0016] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.
[0018] Figure 1 A schematic structural diagram of a first viewing angle of a battery housing temperature collection structure provided in an embodiment of the present application;
[0019] Figure 2 for Figure 1 A partial enlarged view of the middle A;
[0020] Figure 3 A schematic structural diagram of a second viewing angle of the battery housing temperature collection structure provided in an embodiment of the present application;
[0021] Figure 4 for Figure 3 A partial enlarged view of point B in the middle;
[0022] Figure 5 and Figure 6 They are structural schematic diagrams from other perspectives of the battery casing temperature collection structure provided in the embodiments of the present application.
[0023] Icon: 100-battery shell temperature collection structure; 110-FPC main body; 120-branch structure; 121-first section; 122-second section; 123-third section; 1231-first side; 1232-second side; 124-groove structure; 1241-first endpoint; 1242-second endpoint; 125-connecting groove; 130-temperature sensor; 140-heat conductive part; 150-protective frame; 151-bottom wall; 152-outer wall; 153-inner wall; 1531-first edge; 1532-second edge; 154-top wall; 155-chamfered structure; X-first direction; Y-second direction; Z-third direction. DETAILED DESCRIPTION
[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.
[0025] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.
[0026] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments of the present application, the battery housing temperature collection structure 100 includes an FPC body 110 and a branch structure 120 formed by extending the FPC body 110, the branch structure 120 includes a first section 121, a second section 122 and a third section 123 connected in sequence, the first section 121 is connected to the FPC body 110, the second section 122 extends obliquely relative to the surface of the FPC body 110, the third section 123 is arranged parallel to the FPC body 110, the third section 123 is provided with a temperature sensor 130, and the third section 123 is used to abut against the battery housing to collect the temperature of the battery housing. Among them, the width of the second section 122 is smaller than the width of the third section 123, along the width direction of the branch structure 120, the connection between the second section 122 and the third section 123 has a corner, and a groove structure 124 is formed at the corner, and the groove structure 124 at least occupies part of the space of the second section 122 in the width direction.
[0027] like Figure 5 As shown, the second section 122 extends obliquely relative to the surface of the FPC body 110, which means that the second section 122 and the FPC body 110 are arranged at an angle. Based on the third section 123 being arranged parallel to the surface of the FPC body 110, the angle between the second section 122 and the FPC body 110 is the angle θ between the second section 122 and the third section 123, θ<90°. The first section 121 connects the FPC body 110 and the second section 122. The first section 121 can be arranged parallel to the FPC body 110, or the FPC body 110 can smoothly transition to the second section 122 through the first section 121. The bending amplitude of each bend is reduced through multiple bends, thereby improving the life of the wiring harness.
[0028] The branch structure 120 extends in length along the first direction X, in width along the second direction Y, and in thickness along the third direction Z. Along the second direction Y, the width of the second section 122 is W2, and the width of the third section 123 is W3, W2<W3.
[0029] like Figure 2As shown, along the width direction of the branch structure 120, the connection between the second section 122 and the third section 123 has a corner, and the groove structure 124 is formed at the corner, which means that at at least one edge of the branch structure 120 along the second direction Y, the connection between the second section 122 and the third section 123 is narrowed, and the groove structure 124 can be an arc groove or a square groove, so as to achieve a smooth transition at this location and reduce the possibility of tearing at this location under stress.
[0030] In the battery shell temperature collection structure 100 of the embodiment of the present application, the second section 122 of the branch structure 120 extends obliquely relative to the surface of the FPC body 110, which can reduce the risk of damage and failure of the temperature collection harness due to bending; the width of the second section 122 is smaller than the width of the third section 123, and along the width direction of the branch structure 120, a groove structure 124 is formed at the connection between the second section 122 and the third section 123, which can reduce the risk of damage and failure due to tearing at this location, thereby having better safety performance and a longer effective service life.
[0031] In some embodiments of the present application, the edge profile of the groove structure 124 is a curve, and the groove structure 124 smoothly transitions from the second section 122 to the third section 123 .
[0032] With this arrangement, the connection between the second section 122 and the third section 123 has a smooth transition without any bends, thereby further reducing the risk of tearing at this location.
[0033] In other embodiments, the edge contour of the groove structure 124 may also be a multi-segment fold line.
[0034] In some embodiments of the present application, along the width direction of the branch structure 120 , a groove structure 124 is formed on both sides of the connection between the second section 122 and the third section 123 .
[0035] That is, along the second direction Y, both sides of the second section 122 are narrower than the third section 123 , and both sides of the branch structure 120 have a groove structure 124 .
[0036] This arrangement can reduce the risk of tearing on both sides of the branch structure 120 in the width direction.
[0037] In other embodiments, along the second direction Y, the edges of the second section 122 and the third section 123 of the branch structure 120 are flush on one side, and a stepped corner is formed at the connection between the second section 122 and the third section 123 on the other side.
[0038] like Figure 5As shown, along the thickness direction of the branch structure 120 , two sides of the third section 123 are respectively a first side 1231 and a second side 1232 , the first side 1231 is arranged facing the FPC body 110 , and the second side 1232 is arranged away from the FPC body 110 .
[0039] like Figure 5 and Figure 6 As shown, in some embodiments of the present application, the battery housing temperature collection structure 100 further includes a heat conductive member 140 , and the heat conductive member 140 is thermally connected to the second side 1232 for abutting against the battery housing.
[0040] The shape of the heat conducting member 140 matches the shape of the third section 123 . For example, if the third section 123 is square, the heat conducting member 140 is also square; if the third section 123 is circular, the heat conducting member 140 is also circular.
[0041] The heat conducting member 140 may be an aluminum sheet or a ceramic sheet.
[0042] The heat conducting member 140 can better fit the surface of the battery casing, thereby accurately collecting the temperature of the battery casing.
[0043] like Figure 2 and Figure 5 As shown, in some embodiments of the present application, the battery housing temperature collection structure 100 further includes a protective frame 150 , which is disposed around the temperature sensor 130 and is disposed on the first side 1231 .
[0044] The material of the protection frame 150 is epoxy resin. The height of the protection frame 150 extends along the third direction Z. The height of the protection frame 150 is greater than the height of the temperature sensor 130 protruding from the first side 1231 to better protect the temperature sensor 130 .
[0045] By providing the protection frame 150 , the temperature sensor 130 can be isolated from being damaged by other components.
[0046] like Figure 2 , Figure 4 and Figure 5 As shown, the protection frame 150 includes a bottom wall 151, an outer wall 152, an inner wall 153 and a top wall 154. The bottom wall 151 and the top wall 154 are arranged opposite to each other along the third direction Z. The outer wall 152 is a side away from the temperature sensor 130, and the inner wall 153 is a side facing the temperature sensor 130. The bottom wall 151 is in contact with the first side 1231 of the third section 123, and the outer wall 152 is connected to the bottom wall 151.
[0047] In some embodiments of the present application, along the width direction of the branch structure 120 , the edge of the groove structure 124 does not exceed the inner sidewall 153 .
[0048] like Figure 5 As shown, specifically, the two edges of the inner side wall 153 in the second direction Y are the first edge 1531 and the second edge 1532, and the two edges in the first direction X are the third edge and the fourth edge (not marked in the figure), and the first edge 1531, the second edge 1532, the third edge 1533 and the fourth edge together enclose the inner contour of the protection frame 150. The two endpoints of the edge of the groove structure 124 are the first endpoint 1241 and the second endpoint 1242. Along the second direction Y, the projection of the portion of the branch structure 120 from the first endpoint 1241 to the second endpoint 1242 does not overlap with the inner contour of the protection frame 150, that is, it is located outside the inner contour.
[0049] It is understandable that the protective frame 150 is arranged around the temperature sensor 130, and a closed glue dipping space is formed between the protective frame 150 and the third section 123 for fixing the temperature sensor 130. The edge of the groove structure 124 does not exceed the inner wall 153, which can ensure that the bottom of the glue dipping space is closed and reduce the risk of glue leakage.
[0050] With this arrangement, a smooth transition can be achieved at the connection between the second section 122 and the third section 123 through the groove structure 124, thereby reducing the risk of tearing there, and the normal dipping process of the temperature sensor 130 can be ensured.
[0051] like Figure 4 As shown, in some embodiments of the present application, the connection between the second section 122 and the third section 123 has a local width W4 due to the provision of the groove structure 124, and the width of the protection frame 150 along the second direction Y is W5, satisfying:
[0052] 0.25≤W4 / W5≤0.5.
[0053] For example, when W5=6 mm, the range of W4 is 1.5-3 mm.
[0054] This arrangement ensures a smooth transition between the second section 122 and the third section 123 and also ensures sufficient structural strength.
[0055] In some embodiments of the present application, a chamfered structure 155 is formed at a connection between the outer wall 152 and the bottom wall 151 .
[0056] By providing the chamfer structure 155, the contact area between the protection frame 150 and the branch structure 120 can be further reduced, so that the bending stress therein is reduced, thereby ensuring the service life of the collection harness.
[0057] like Figure 2 , Figure 4 and Figure 5As shown, further, the radius of the chamfered structure 155 is R, and the thickness of the protective frame 150 is D, which satisfies:
[0058] 0.25≤R / D≤0.75.
[0059] The thickness of the protection frame 150 refers to a distance D between the outer sidewall 152 and the inner sidewall 153 along other directions perpendicular to the third direction Z.
[0060] This arrangement can reduce the contact area between the protection frame 150 and the branch structure 120 , while ensuring that the protection frame 150 is firmly installed on the branch structure 120 and is not easy to fall off from the branch structure 120 .
[0061] like Figure 5 As shown, in some embodiments of the present application, the angle between the second section 122 and the third section 123 is θ, which satisfies:
[0062] 10°≤θ≤60°.
[0063] This arrangement can ensure a smooth transition between the second section 122 and the third section 123 , reduce the risk of damage to the wiring harness at the bend, and adapt to the height difference between the battery housing surface and the FPC body 110 .
[0064] In some embodiments of the present application, the first section 121 is disposed in parallel with the FPC body 110 .
[0065] This arrangement can simplify the structure of the battery housing temperature collection structure 100 .
[0066] In other embodiments, the first section 121 and the FPC body 110 may also be arranged obliquely. For example, the FPC body 110 is located on the upper side of the battery housing, and the first section 121 extends obliquely downward from the FPC body 110 .
[0067] In some embodiments of the present application, the first section 121 and the second section 122 have the same width and extend in the same direction, that is, the first section 121 and the second section 122 only differ in their tilt angles along the first direction X, and do not bend in the second direction Y.
[0068] In other embodiments, the second section 122 may also be bent in the second direction Y relative to the first section 121 .
[0069] In some embodiments of the present application, along the width direction of the branch structure 120, the spacing between the first section 121 and the FPC body 110 is L, satisfying:
[0070] L≥2mm.
[0071] Based on the aforementioned implementation that “the first segment 121 and the second segment 122 are not bent in the second direction Y”, the distance between the first segment 121 and the FPC body 110 is equal to the distance between the second segment 122 and the FPC body 110 .
[0072] A connection groove 125 is formed at the connection between the branch structure 120 and the FPC body 110. Through this arrangement, the chamfer radius of the connection groove 125 can be increased, thereby reducing the risk of tearing at this location.
[0073] In some embodiments of the present application, the width of the first section 121 is W1, which satisfies:
[0074] 3≤W1≤10mm.
[0075] Based on the aforementioned implementation in which the first section 121 and the second section 122 have the same width, W1 = W2.
[0076] This arrangement can increase the spacing between the branch structure 120 and the FPC body 110, ensuring that the connection groove 125 has a smooth transition and is not easily torn, has sufficient width to arrange the heating harness, and has sufficient structural strength to be not easily broken.
[0077] In some embodiments of the present application, the thickness of the film near the groove structure 124 is reduced from a multi-layer film to a single-layer film.
[0078] That is to say, for the battery housing temperature collection structure 100, the FPC body 110 is a multi-layer film structure, the third section 123 and the groove structure 124 are only single-layer film structures, and the first section 121 and the second section 122 decrease from a multi-layer film structure to a single-layer film structure.
[0079] This arrangement can reduce the risk of increased bending stress due to material thickness, thereby ensuring safety at the bend.
[0080] As a preferred embodiment, the FPC body 110 and the first section 121 are multi-layer film structures, the second section 122 and the third section 123 are single-layer film structures, and the connection between the first section 121 and the second section 122 is treated with a decreasing film layer.
[0081] Using the battery casing temperature collection structure 100 of the embodiment of the present application to collect the temperature of the battery casing not only has better safety performance, but also has a longer effective service life.
[0082] It should be noted that, in the absence of conflict, the features in the embodiments of this application may be combined with each other.
[0083] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A battery housing temperature collection structure, characterized in that: include: An FPC body and a branch structure formed by extending the FPC body, the branch structure comprising a first section, a second section and a third section connected in sequence, the first section being connected to the FPC body, the second section extending obliquely relative to the surface of the FPC body, the third section being arranged parallel to the FPC body, the third section being provided with a temperature sensor, and the third section being used to abut against a battery housing to collect the temperature of the battery housing; Among them, the width of the second section is smaller than the width of the third section. Along the width direction of the branch structure, the connection between the second section and the third section has a corner, and a groove structure is formed at the corner. The groove structure at least occupies part of the space of the second section in the width direction.
2. The battery housing temperature collection structure according to claim 1, characterized in that: The edge profile of the groove structure is a curve, and the groove structure smoothly transitions from the second section to the third section.
3. The battery housing temperature collection structure according to claim 1, characterized in that: Along the width direction of the branch structure, a groove structure is formed on both sides of the connection between the second section and the third section.
4. The battery housing temperature collection structure according to claim 1, characterized in that: Along the thickness direction of the branch structure, the two sides of the third section are respectively a first side and a second side, the first side is arranged facing the FPC body, and the second side is arranged away from the FPC body, and the battery housing temperature collection structure further includes: A heat conducting member is heat-conductingly connected to the second side and is used for abutting against the battery housing.
5. The battery housing temperature collection structure according to claim 1, characterized in that: Along the thickness direction of the branch structure, the two sides of the third section are respectively a first side and a second side, the first side is arranged facing the FPC body, and the second side is arranged away from the FPC body, and the battery housing temperature collection structure further includes: A protective frame is arranged around the temperature sensor and is arranged on the first side.
6. The battery housing temperature collection structure according to claim 5, characterized in that: The protection frame comprises an inner side wall, and the edge of the groove structure does not exceed the inner side wall.
7. The battery housing temperature collection structure according to claim 5, characterized in that: The protection frame includes a bottom wall and an outer side wall, the bottom wall is in contact with the first side, the outer side wall is connected to the bottom wall, and a chamfered structure is formed at the connection between the outer side wall and the bottom wall.
8. The battery housing temperature collection structure according to claim 7, characterized in that: The radius of the chamfered structure is R, and the thickness of the protective frame is D, which satisfies: 0.25≤R / D≤0.
75.
9. The battery housing temperature collection structure according to claim 1, characterized in that: The angle between the second segment and the third segment is θ, which satisfies: 10°≤θ≤60°.
10. The battery housing temperature collection structure according to claim 1, characterized in that: Along the width direction of the branch structure, the distance between the first section and the FPC body is L, which satisfies: L≥2mm.