Fixtures, battery modules and electrical devices

Abstract

A fixing device for fixing a flexible circuit board. The fixing device includes a base and a bracket arranged on the base. The fixing device also includes a movable block and a receiving space. The movable block is arranged between the base and the bracket. The movable block can move toward or away from the bracket relative to the base. The receiving space is arranged between the movable block and the bracket, and is used to receive the flexible circuit board. The present application also provides a battery module having the fixing device and an electrical device having the battery module. In the present application, the flexible circuit board is effectively fixed with the help of the fixing device, thereby effectively preventing problems such as easy failure and poor communication caused by the flexible circuit board being placed in the air.

Description

Technical Field

[0001] The present application relates to the field of batteries, and in particular to a fixing device, a battery module having the fixing device, and an electrical device having the battery module. Background Art

[0002] At present, most of the flexible circuit boards in battery packs have no support protection at the bent and suspended parts, which makes it very easy for the flexible circuit boards to fail and communication problems to occur due to vibration. However, currently, for the bent and suspended parts of the flexible circuit boards, glue and fillers are generally set on the back of the flexible circuit boards to reduce the vibration of the flexible circuit boards to a certain extent, but this will cause problems such as the fillers being difficult to fix and the dimensional errors being difficult to adjust, as well as the risk of the back glue failing. Summary of the invention

[0003] In view of this, it is necessary to provide a fixing device to solve the above problems.

[0004] In addition, it is also necessary to provide a battery module having the fixing device.

[0005] A fixing device for fixing a flexible circuit board, the fixing device comprising a base and a bracket arranged on the base, the fixing device also comprising:

[0006] a movable block, disposed between the base and the bracket, the movable block being movable relative to the base toward or away from the bracket; and

[0007] The receiving space is arranged between the movable block and the bracket and is used for receiving the flexible circuit board.

[0008] Optionally, the base includes a bottom plate and two oppositely arranged side plates, the side plates are respectively located on both sides of the bottom plate, a slide groove is provided on the side plate, and a sliding block matching the slide groove is provided on the side of the movable block.

[0009] Optionally, the base includes a limit block, the limit block is fixed to the slide groove, and the slide block is arranged between the limit block and the bottom plate.

[0010] Optionally, the surface of the movable block facing the bottom plate is recessed toward the direction of the bracket to form a first groove, a convex column is provided in the first groove, the base includes a protruding portion arranged on the bottom plate, the surface of the protruding portion facing away from the bottom plate is recessed toward the direction of the bottom plate to form a second groove, the protruding portion is accommodated in the first groove, and the convex column is correspondingly accommodated in the second groove.

[0011] Optionally, the fixing device includes an elastic portion, and the elastic portion is arranged in the second groove.

[0012] Optionally, the elastic part is a spring, and a height of the spring in a free state is greater than a depth of the second groove.

[0013] Optionally, the bracket is provided with a fixing member, which includes a connecting portion and a hook portion, the connecting portion is protruding from the surface of the bracket facing the bottom plate, the hook portion is formed by extending outward from one end of the connecting portion away from the bracket, and an opening is provided on the side panel, and the hook portion is correspondingly snapped into the opening.

[0014] Optionally, the fixing device also includes a first pad and a second pad, the first pad is arranged on the surface of the bracket facing the movable block, the second pad is arranged on the surface of the movable block facing the first pad, the receiving space is arranged between the first pad and the second pad, and the first pad and the second pad are elastic pads.

[0015] A battery module comprises a cell module, a circuit board, a flexible circuit board connecting the cell module and the circuit board, and the fixing device mentioned above, wherein the fixing device is arranged on the circuit board, and the flexible circuit board is arranged in the receiving space.

[0016] An electrical device comprises the battery module described above.

[0017] In the present application, a fixing device is arranged on the circuit board, and the flexible circuit board is effectively fixed by the cooperation of the base, the bracket and the movable block, thereby effectively preventing the problems of easy failure and poor communication caused by the flexible circuit board being placed in the air. In addition, the travel of the movable block is guaranteed by the setting of the elastic part, so that the connection height of the flexible circuit board and its connection part can be flexibly adjusted by moving the movable block up and down, so as to make the battery module assembly more flexible and convenient. Furthermore, the use of the fixing device to fix the flexible circuit board also overcomes the problems caused by the traditional glue and filler used to fix the flexible circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of a fixing device according to one embodiment of the present application.

[0019] Figure 2 for Figure 1 Exploded view of the fixing device shown.

[0020] Figure 3 for Figure 2 A partial structural schematic diagram of the base, protrusion, limit block and protrusion shown.

[0021] Figure 4 for Figure 2 A partially exploded schematic view of the fixing device shown.

[0022] Figure 5 For along Figure 1 A partial cross-sectional schematic diagram of line VI-VI is shown.

[0023] Figure 6 for Figure 2 Schematic diagram of the structure of the movable block and the base shown.

[0024] Figure 7 It is a schematic structural diagram of a battery module according to one embodiment of the present application.

[0025] Figure 8 for Figure 7 Schematic diagram of the partial structure of the battery module shown.

[0026] Fig. 9 It is a schematic diagram of a module of an electrical device according to an embodiment of the present application.

[0027] Main component symbols

[0028] Electrical equipment 1000

[0029] Battery module 100

[0030] Fixing device 10

[0031] Base 11

[0032] Bottom plate 111

[0033] Side Panel 112

[0034] Accommodation space 113

[0035] Chute 114

[0036] Groove bottom wall 1141

[0037] Groove side wall 1142

[0038] First Chute Division 1143

[0039] Second Chute Division 1144

[0040] Opening 1145

[0041] Limit block 115

[0042] The first limiting portion 1151

[0043] The second limiting portion 1152

[0044] Bump 116

[0045] Gap 1161

[0046] Protrusion 117

[0047] Second surface 1171

[0048] The second groove 1172

[0049] Second groove bottom surface 1173

[0050] Second groove side 1174

[0051] Elastic portion 118

[0052] First end 1181

[0053] Second end 1182

[0054] Bracket 12

[0055] Fixing parts 121

[0056] Connection part 1211

[0057] hook part 1212

[0058] Activity Block 13

[0059] Slider 131

[0060] First surface 132

[0061] First groove 133

[0062] The first groove bottom surface 1331

[0063] First groove side 1332

[0064] Boss 134

[0065] The third surface 135

[0066] The third groove 136

[0067] First cushion block 14

[0068] The second cushion block 15

[0069] Containment Space 16

[0070] Matching portion 151

[0071] Battery module 20

[0072] Tab 21

[0073] Circuit board 22

[0074] Flexible circuit board 30

[0075] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0076] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0077] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0078] Some embodiments of the present application are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0079] Ginseng Figure 1 The present application embodiment provides a fixing device 10 for fixing a flexible circuit board 30 (see Figure 7 ). The fixing device 10 includes a base 11, a bracket 12, a movable block 13 and a receiving space 16. The bracket 12 is disposed on the base 11. The movable block 13 is disposed between the base 11 and the bracket 12. The movable block 13 can move toward or away from the bracket 12 relative to the base 11. The receiving space 16 is disposed between the movable block 13 and the bracket 12, and is used to receive the flexible circuit board 30.

[0080] Ginseng Figure 2 , the base 11 includes a bottom plate 111 and two oppositely arranged side plates 112. The two side plates 112 are respectively located on both sides of the bottom plate 111, and together with the bottom plate 111 form a accommodating space 113. A slide groove 114 is respectively provided on the two side plates 112. The two slide grooves 114 are oppositely arranged. In this embodiment, the base 11 and the two side plates 112 are integrally formed. The base 11 and the two side plates 112 are both rectangular. In other embodiments, the shapes of the base 11 and the two side plates 112 can be adaptively adjusted according to actual needs, and can be regular shapes such as round, diamond or other irregular shapes.

[0081] The movable block 13 is accommodated in the accommodation space 113. Slide blocks 131 are respectively provided on both sides of the movable block 13 to match the slide grooves 114. The slide blocks 131 are slidably connected to the slide grooves 114, so that the movable block 13 moves toward or away from the bracket 12 relative to the base 11 in the thickness direction of the fixing device 10 (i.e., the X-axis direction).

[0082] Ginseng Figure 2 In this embodiment, each chute 114 includes a chute bottom wall 1141 and two opposite chute side walls 1142. The two chute side walls 1142 are respectively located on both sides of the chute bottom wall 1141. The chute bottom wall 1141 and the two chute side walls 1142 extend from the bottom plate 111 toward the bracket 12.

[0083] Ginseng Figure 3 Furthermore, the base 11 further includes a limit block 115. The limit block 115 is fixed in the slide groove 114. The slider 131 is arranged between the limit block 115 and the bottom plate 111. Thus, the setting of the limit block 115 limits the sliding range of the slider 131 in the slide groove 114, thereby ensuring that the movable block 13 slides toward or away from the bracket 12 relative to the bottom plate 111 within a preset stroke.

[0084] Ginseng Figure 3 Specifically, two protrusions 116 are provided in each slide groove 114. Each protrusion 116 is provided at the connection between the groove bottom wall 1141 and the groove side wall 1142. The two protrusions 116 are opposite to each other and are arranged at intervals to form a gap 1161. In this embodiment, the limit block 115 includes a first limit portion 1151 and a second limit portion 1152. The first limit portion 1151 is accommodated in the gap 1161. The second limit portion 1152 is connected to the first limit portion 1151 and is connected between the two groove side walls 1142. In this way, through the setting of the limit block 115, the slide groove 114 is divided into a first slide groove section 1143 and a second slide groove section 1144. Among them, the first slide groove section 1143 is closer to the bottom plate 111 relative to the second slide groove section 1144. The slider 131 is slidably connected to the first slot section 1143. In one embodiment, the stop block 115 is interference fit with the protrusion 116 and the two slot side walls 1142.

[0085] In other embodiments, the limiting block 115 can be omitted according to actual needs.

[0086] Ginseng Figure 2 , Figure 4 and Figure 5, the movable block 13 includes a first surface 132 facing the bottom plate 111. The first surface 132 is recessed toward the bracket 12 to form a first groove 133. A boss 134 is provided in the first groove 133. Correspondingly, the base 11 also includes a protrusion 117. The protrusion 117 is protruding from the bottom plate 111 and is located between the two side plates 112. The protrusion 117 includes a second surface 1171 facing away from the bottom plate 111. The second surface 1171 is recessed toward the bottom plate 111 to form a second groove 1172. The protrusion 117 is accommodated in the first groove 133, and the boss 134 is correspondingly accommodated in the second groove 1172 to limit the movement of the movable block 13 in the length direction of the fixing device 10 (i.e., the Y-axis direction) and the width direction of the fixing device 10 (i.e., the Z-axis direction). In this embodiment, the height of the protruding column 134 and the height of the protruding portion 117 are both not greater than the depth of the first groove 133 .

[0087] Ginseng Figure 4 In this embodiment, two first grooves 133 are provided on the first surface 132. The two first grooves 133 are respectively located on both sides of the first surface 132 close to the slider 131. Accordingly, two protrusions 117 corresponding to the first grooves 133 are provided on the bottom plate 111. In other embodiments, the number of the first grooves 133 and the protrusions 117 can be adaptively adjusted according to actual needs, and can be one, three, four, etc.

[0088] Ginseng Figure 5 Specifically, the first groove 133 includes a first groove bottom surface 1331 and a first groove side surface 1332 arranged around the periphery of the first groove bottom surface 1331. The protrusion 134 is arranged protrudingly on the first groove bottom surface 1331. The second groove 1172 includes a second groove bottom surface 1173 and a second groove side surface 1174 arranged around the periphery of the second groove bottom surface 1173. The shapes of the first groove 133, the protrusion 134 and the second groove 1172 are not limited to regular shapes such as circles and rectangles or other irregular shapes.

[0089] Ginseng Figure 5 Further, the fixing device 10 further includes an elastic portion 118. The elastic portion 118 is located between the bottom plate 111 and the movable block 13, and is used to support the movable block 13 to cooperate with the bracket 12 to fix the flexible circuit board 30, and to ensure the travel of the movable block 13 in the thickness direction of the fixing device 10. Further, when the elastic portion 118 is compressed to the expected position, the limit block 115 can limit the movable block 13 from moving toward the bracket 12.

[0090] Ginseng Figure 5 In this embodiment, the elastic portion 118 is a hollow annular structure, including a first end 1181 and a second end 1182 facing away from the first end 1181. The elastic portion 118 is disposed in the second groove 1172. Thus, when the movable block 13 is disposed in the accommodation space 113, the elastic portion 118 disposed in the second groove 1172 is accommodated in the first groove 133 together with the protruding portion 117, and the protruding column 134 is penetrated in the elastic portion 118. At this time, the first end 1181 of the elastic portion 118 abuts against the bottom surface 1331 of the first groove, the second end 1182 of the elastic portion 118 abuts against the bottom surface 1173 of the second groove, and the height of the elastic portion 118 is greater than the depth of the first groove 133. Among them, the height of the boss 134 and the height of the protrusion 117 are not higher than the depth of the first groove 133, so that the movable block 13 is supported by the elastic portion 118 to contact the bracket 12, and the movable block 13 is spaced apart from the bottom plate 111, thereby ensuring the travel of the movable block 13 in the thickness direction of the fixing device 10.

[0091] The height of the elastic portion 118 in a free state is greater than the depth of the first groove 133. The free state of the elastic portion 118 refers to a state when the elastic portion 118 is not compressed, that is, a state when the elastic portion 118 is disposed in the second groove 1172. The distance from the first surface 132 to the bottom plate 111 is the stroke of the movable block 13.

[0092] In one embodiment, the elastic portion 118 is a spring.

[0093] Ginseng Figure 2 , the bracket 12 is fixed to the base 11. In this embodiment, two fixing members 121 are protruding from the bracket 12 and are arranged opposite to each other. The fixing members 121 are arranged at both ends of the bracket 12. The bracket 12 is fixed to the base 11 by the two fixing members 121.

[0094] Ginseng Figure 2 and Figure 3 Specifically, each fixing member 121 includes a connecting portion 1211 and a hook portion 1212. The connecting portion 1211 is protrudingly disposed on the surface of the bracket 12 facing the bottom plate 111. The hook portion 1212 is formed by extending outward from one end of the connecting portion 1211 away from the bracket 12. Correspondingly, an opening 1145 is provided on the bottom wall 1141 of the second chute section 1144. The hook portion 1212 is correspondingly engaged in the opening 1145, so that the bracket 12 is fixed to the base 11.

[0095] In other embodiments, the fixing member 121 may be omitted. In this way, the bracket 12 may be fixed to the side plate 112 of the base 11 by welding, bonding, screwing or other methods.

[0096] Ginseng Figure 1 , the fixing device 10 further includes a first pad 14 and a second pad 15. The first pad 14 is arranged on the surface of the bracket 12 facing the movable block 13, and the second pad 15 is arranged on the surface of the movable block 13 facing the first pad 14. The receiving space 16 is arranged between the first pad 14 and the second pad 15. Among them, the flexible circuit board 30 is fixed between the first pad 14 and the second pad 15. In this embodiment, the first pad 14 and the second pad 15 are elastic pads, which can protect the flexible circuit board 30. In addition, the first pad 14 and the second pad 15 are designed as elastic pads, so that the first pad 14 and the second pad 15 can be compressed under the action of the movable block 13 and the bracket 12, and when the movable block 13 moves up and down, because the elastic pad itself has elastic properties, the flexible circuit board 30 can also be firmly clamped between the first pad 14 and the second pad 15 when the movable block 13 moves.

[0097] In other embodiments, the first cushion block 14 and the second cushion block 15 may be omitted.

[0098] Ginseng Figure 4 , Figure 5 and Figure 6 In this embodiment, the movable block 13 includes a third surface 135 facing away from the first surface 132. Two third grooves 136 are provided on the third surface 135. Correspondingly, a matching portion 151 matching with the third groove 136 is convexly provided on the second cushion block 15. The matching portion 151 is correspondingly snapped into the third groove 136 to fix the second cushion block 15 to the third surface 135 of the movable block 13. In other embodiments, the second cushion block 15 can be fixed to the third surface 135 of the movable block 13 by welding, bonding, screwing, etc.

[0099] In one embodiment, the first cushion block 14 and the bracket 12 can be connected by means of clamping, welding, bonding, screwing, etc.

[0100] Ginseng Figure 7, the present application also provides a battery module 100. The battery module 100 includes the fixing device 10, a battery cell module 20, a circuit board 22, and the flexible circuit board 30 connecting the battery cell module 20 and the circuit board 22. The fixing device 10 is disposed on the circuit board 22. In this embodiment, the fixing device 10 is fixed to the circuit board 22 by screws. In other embodiments, the fixing device 10 can also be fixed to the circuit board 22 by buckles.

[0101] Ginseng Figure 7 and Figure 8 Specifically, one end of the flexible circuit board 30 is connected to the pole ear 21 on the battery module 20 to collect signals such as the voltage and temperature of the battery module 20, and the other end of the flexible circuit board 30 is connected to the circuit board 22 on the battery module 20. The circuit board 22 and the pole ear 21 are respectively located on different sides of the battery module 20, and the flexible circuit board 30 needs to be bent 90 degrees so that the two ends of the flexible circuit board 30 can be connected to the pole ear 21 and the circuit board 22 respectively. In this way, in the present application, the fixing device 10 is used to set the flexible circuit board 30 at the bend between the bracket 12 and the movable block 13 for fixing, so as to avoid the problems of easy failure and poor communication caused by the flexible circuit board 30 at the bend being placed in the air. In addition, due to problems such as assembly tolerances during the production of the battery module 100, it is impossible to ensure that the height of the flexible circuit board 30 is consistent each time it is assembled. It may be necessary to adjust the height of the flexible circuit board 30 up and down to ensure the connection between the flexible circuit board 30 and the pole ear 21 and / or the circuit board 22. The setting of the elastic portion 118 ensures the movement stroke of the movable block 13, so that the horizontal height between the flexible circuit board 30 and the connection part (i.e., the pole ear 21 and / or the circuit board 22) can be adjusted by moving the movable block 13 up and down, thereby solving the problems caused by the assembly tolerances of the battery module 100 during the production process, so that the assembly of the battery module 100 is more flexible and convenient.

[0102] In the present application, the movable block 13 is movably arranged on the base 11, and cooperates with the elastic part 118 to fix the flexible circuit board 30 together with the bracket 12, thereby greatly reducing the damage caused by the shaking of the flexible circuit board 30 under vibration conditions, and effectively preventing the problems of easy failure and poor communication caused by the flexible circuit board 30 being placed in the air. In addition, the fixing device 10 can realize the bending and fixing of the flexible circuit board 30, and improve the connection reliability of the flexible circuit board 30. In addition, the fixing device 10 also has the advantages of simple installation and easy operation.

[0103] Ginseng Figure 1 , Figure 5 , Figure 7 and Figure 8The following will briefly describe the steps of fixing the fixing device 10 to the circuit board 22 and fixing the flexible circuit board 30 using the fixing device 10 .

[0104] Step 1: fix the base 11 of the fixing device 10 mentioned above to the circuit board 22 by screws.

[0105] Step 2: Place the flexible circuit board 30 on the second pad 15. Figure 7 and Figure 8 One end of the flexible circuit board 30 is connected to the tab 21 on the battery module 20 , and the other end of the flexible circuit board 30 is close to but not connected to the circuit board 22 .

[0106] Step three, with the help of the bracket 12, the movable block 13 is pressed down toward the bottom plate 111 along the thickness direction of the fixing device 10, the elastic part 118 is continuously compressed, and the movable block 13 is continuously approached to the bottom plate 111 until the other end of the flexible circuit board 30 is adjusted to be roughly at the same level as the circuit board 22. Then, the fixing members 121 at both ends of the bracket 12 are connected to the openings 1145 on the base 11 to fix the bracket 12 to the base 11. At this time, the second pad 15 on the movable block 13 cooperates with the first pad 14 on the bracket 12 to clamp and fix the flexible circuit board 30 together. In other embodiments, the height of the flexible circuit board 30 can be adjusted according to actual conditions, and it does not necessarily need to be at the same level as the circuit board 22.

[0107] Step 4: Connect the other end of the flexible circuit board 30 to the circuit board 22. After the bracket 12 is assembled to the base 11, if the other end of the flexible circuit board 30 and the circuit board 22 cannot be assembled due to the height difference, the movable block 13 can be adjusted up and down to adjust the horizontal height of the flexible circuit board 30 and the circuit board 22 to ensure the connection between the flexible circuit board 30 and the circuit board 22. In other embodiments, the other end of the flexible circuit board 30 can also be connected to the circuit board 22 in step 2, without limitation.

[0108] Ginseng Fig. 9 The present application also provides an electric device 1000. The electric device 1000 includes the battery module 100 described above. The electric device 1000 may be a mobile electronic device, an energy storage device, an electric vehicle, a hybrid electric vehicle, etc. The mobile electronic device may be a mobile phone, a wearable electronic device, a tablet computer, a laptop computer, etc.

[0109] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A battery module, comprising a fixing device, a battery cell module, a circuit board, and a flexible circuit board connecting the battery cell module and the circuit board, characterized in that: The fixing device comprises a base and a bracket, a movable block and a receiving space arranged on the base; The movable block is disposed between the base and the bracket, and the movable block can move toward or away from the bracket relative to the base, and a portion of the surface of the movable block is exposed outside the base and the bracket; as well as The flexible circuit board passes through the receiving space, one end of the flexible circuit board is connected to the tab on the battery module, and the other end of the flexible circuit board is connected to the circuit board on the battery module, wherein the circuit board and the tab are respectively located on different sides of the battery module; The fixing device further comprises a first cushion block and a second cushion block, wherein the first cushion block is arranged on a surface of the bracket facing the movable block, and the second cushion block is arranged on a surface of the movable block facing the first cushion block. The receiving space is arranged between a first cushion block and a second cushion block, the first cushion block and the second cushion block are elastic cushion blocks, and the flexible circuit board is clamped between the first cushion block and the second cushion block.

2. The battery module according to claim 1, characterized in that: The base comprises a bottom plate and two oppositely arranged side plates, wherein the side plates are respectively located at two sides of the bottom plate, and slide grooves are arranged on the side plates, and sliding blocks matched with the slide grooves are arranged on the sides of the movable block.

3. The battery module according to claim 2, characterized in that: The base comprises a limit block, the limit block is fixed to the slide slot, and the slide block is arranged between the limit block and the bottom plate.

4. The battery module according to claim 2 or 3, characterized in that: The surface of the movable block facing the bottom plate is recessed toward the bracket to form a first groove, a convex column is provided in the first groove, the base includes a protruding portion arranged on the bottom plate, the surface of the protruding portion facing away from the bottom plate is recessed toward the bottom plate to form a second groove, the protruding portion is accommodated in the first groove, and the convex column is correspondingly accommodated in the second groove.

5. The battery module according to claim 4, characterized in that: The fixing device comprises an elastic portion, and the elastic portion is arranged in the second groove.

6. The battery module according to claim 5, characterized in that: The elastic part is a spring, and the height of the spring in a free state is greater than the depth of the second groove.

7. The battery module according to claim 4, characterized in that: The bracket is provided with a fixing part, which includes a connecting part and a hook part. The connecting part is protruding from the surface of the bracket facing the bottom plate, and the hook part is formed by extending outward from one end of the connecting part away from the bracket. An opening is provided on the side plate, and the hook part is correspondingly engaged in the opening.

8. An electrical device, characterized in that: The electrical device comprises a battery module as claimed in any one of claims 1 to 7.

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