TWM621870U - Fixing mechanism for multi-cell battery module - Google Patents

Abstract

The present invention provides a fixing mechanism for a multi-cell battery module, comprising a plurality of battery fixing frames, wherein each group of the battery fixing frames respectively comprises a first fixing unit and a second fixing unit. The outer surface of the first fixing unit is provided with a concave portion and the concave portion is provided with a first through hole, while the outer surface of the second fixing unit is provided with a corresponding convex portion and the convex portion is provided with a second through hole. When the first fixing unit is connected to another second fixing unit, the protruding part of the second fixing unit is inserted into the concave part of the first fixing unit, so that the two rods with male threads pass through the corresponding first fixing unit respectively. A through hole corresponds to the second through hole of the second fixing unit so as to be locked on a nut.

Description

Fixing mechanism for multi-cell battery module

The new model provides a fixing mechanism for a multi-cell battery module, especially a fixing device for forming a multi-cell battery module by locking between two rod bodies with male threads and a nut.

Rechargeable batteries are widely used in many products, such as notebook computers, tablet computers, mobile communication devices, electric bicycles, electric scooters or electric vehicles. Usually, a plurality of battery cells (Cells) are connected to form a battery pack, and the series and/or parallel connection of each battery cell is adjusted so that the battery pack can output the voltage required by the product.

Generally speaking, a plurality of battery cells can be arranged on a fixing frame, and the battery cells can be connected in series and in parallel through the conductive sheet to form a battery pack, and the battery pack can be installed on the product. In practical application, the battery cell and the battery setting module must be firmly connected to avoid the looseness of the battery cell during use. At the same time, when an electronic product of this type, such as a notebook computer, has more built-in functions or needs to be connected to other electronic products such as a monitor, a keyboard, and a CD-ROM drive, the notebook computer needs more multi-cell batteries.

When the fixing structure of the multi-cell battery must firmly connect the battery cells and the battery setting module, the prior art usually solves this type of problem by using a long rod body with a nut to penetrate the whole to achieve the fixing function. However, when the demand for battery capacity increases and the overall length of the battery is getting longer and longer, the length of the rod body has reached the limit and cannot cope with this design.

Another object of the present invention is to provide a fixing mechanism for a multi-cell battery module, which includes multiple sets of battery fixing brackets, each set of battery fixing brackets can accommodate at least one battery in the accommodating space, and the fixing mechanism is further provided with two common The threaded rod body and a nut are connected in series to form a multi-cell battery module by screwing the two rod bodies with male threads and the nut together to form a multi-cell battery module. The long rods are connected in series to assemble the battery holders; furthermore, the lengths of the two rods with male threads can be designed to be equal or unequal in length and can be movably assembled or disassembled with the battery holders.

Another object of the present invention is to provide a fixing mechanism for a multi-cell battery module, wherein the fixing mechanism assembles a plurality of battery fixing brackets provided with batteries in series to form a multi-cell battery module, and the position of the nut can be adjusted. Selecting in the same section of the multi-cell battery module or choosing to set it between the sections, after the two rods and the nut are locked, the fixing structure can stably fix the multi-cell multi-cell battery module.

In order to achieve the above purpose, the present invention provides a fixing mechanism for a multi-cell battery module, comprising: multiple groups of battery fixing frames, each group of the battery fixing frames respectively includes: a first fixing unit, and the first fixing unit includes at least one a concave part and a plurality of first accommodating parts, the first accommodating part is located on an inner surface of the first fixing unit, and the concave part is located on an outer surface of the first fixing unit, wherein the concave part is provided with a a first through hole; a second fixing unit, the second fixing unit includes at least one protruding part and a plurality of second accommodating parts, the second accommodating part is located on an inner surface of the second fixing unit, and the protruding part is The outgoing part is located on an outer surface of the second fixing unit, and the inner surface of the first fixing unit faces the inner surface of the second fixing unit, and is located between the first accommodating part and the second accommodating part. An accommodating space is formed between the parts to accommodate at least one battery, wherein the protruding part of the second fixing unit is inserted into the first fixing unit The concave part of the element and the protruding part are provided with a second through hole; two rods with male threads pass through the first through holes of the corresponding first fixing units and the corresponding second fixing units respectively. The second through hole is for locking on a nut; wherein the nut is arranged between one set of the battery fixing brackets and the other adjacent set of the battery fixing brackets and is aligned to the first one of the one set of the battery fixing brackets The first through hole of a fixing unit is aligned with the second through hole of the second fixing unit of another group of adjacent battery fixing frames.

In order to achieve the above-mentioned purpose, the present invention further provides a fixing mechanism for a multi-cell battery module, comprising: multiple groups of battery fixing frames, each group of the battery fixing frames respectively includes: a first fixing unit, the first fixing unit includes: At least one concave portion and a plurality of first accommodating portions, the first accommodating portion is located on an inner surface of the first fixing unit, and the concave portion is located on an outer surface of the first fixing unit, wherein the concave portion A first through hole is provided; a second fixing unit, the second fixing unit includes at least one protruding part and a plurality of second accommodating parts, the second accommodating parts are located on an inner surface of the second fixing unit, and The protruding portion is located on an outer surface of the second fixing unit, and the inner surface of the first fixing unit faces the inner surface of the second fixing unit, and is located between the first accommodating portion and the second fixing unit. An accommodating space is formed between the accommodating parts for accommodating at least one battery, wherein the protruding part of the second fixing unit is inserted into the concave part of the first fixing unit and the protruding part is provided with a second through hole; a first rod body with male threads, respectively passing through the first through holes of the corresponding first fixing units and the second through holes of the second fixing units; and a second rod body with female threads, respectively pass through the first through holes of the corresponding first fixing units and the second through holes of the corresponding second fixing units, wherein the first rod body with male threads and the second rod body with female threads Locked together after screwing.

The fixing mechanism of the multi-cell battery module, wherein the battery fixing frame and the nut are combined by means of embedding injection, hot melting, ultrasonic embedding, and direct assembly and insertion.

The fixing mechanism of the multi-cell battery module, wherein the inner surface of the first fixing unit is provided with a first extension part, and the first extension part corresponds to the position of the concave part on the outer surface of the first fixing unit, and the second fixing unit A second extension portion is arranged on the inner surface of the second fixing unit, and the second extension portion corresponds to the position of the protruding portion on the outer surface of the second fixing unit.

The fixing mechanism of the multi-cell battery module, wherein the first through hole of the first fixing unit extends from the concave part to the first extension part, and the second through hole of the second fixing unit extends from the protruding part to the second extension part .

In the fixing mechanism of the multi-cell battery module, the first accommodating portion is arranged around the first extension portion, and the second accommodating portion is arranged around the second extension portion.

In the fixing mechanism of the multi-cell battery module, the lengths of the two rod bodies with male threads are designed to be unequal lengths.

The fixing mechanism of the multi-cell battery module, wherein each battery of the multi-cell battery module is connected to each other in series or parallel mode.

The fixing mechanism of the multi-cell battery module, wherein the fixing mechanism is made of one of plastic or metal materials.

1: Fixed mechanism

10: Battery holder

11: The first fixed unit

111: Depression

1111: Groove

1113: Positioning groove

1115: First Perforation

112: outer surface

113: The first accommodating part

114: inner surface

115: The first fixed frame

117: First extension

119: The first electrical connection unit

13: Second fixed unit

131: Projection

1311: Main body

1313: Ribs

1315: Second Perforation

132: outer surface

133: Second accommodating part

134: inner surface

135:Second Fixture

137: Second extension

139: Second electrical connection unit

14: Accommodating space

15: Battery

171: Rod body

172: Rod body

1711: External thread part

1712: External thread part

173: Nut

181: The first rod body

1811: External thread part

183: Second rod body

1831: Internal thread part

FIG. 1 is a perspective combined view of an embodiment of the fixing mechanism of the multi-cell battery module of the present invention.

FIG. 2 is an exploded perspective view of an embodiment of the fixing mechanism of the novel multi-cell battery module.

3 and 4 are a first perspective view and a second perspective perspective view of the first fixing unit of the fixing mechanism of the multi-cell battery module of the present invention.

5 and 6 are a first perspective view and a second perspective perspective view of the second fixing unit of the fixing mechanism of the multi-cell battery module of the present invention.

FIG. 7 is a perspective view of another embodiment of the fixing mechanism of the novel multi-cell battery module.

FIG. 8 is a perspective view of another embodiment of the fixing mechanism of the novel multi-cell battery module.

9 is a schematic cross-sectional view of an embodiment of the concave portion of the first fixing unit and the protruding portion of the second fixing unit of the present invention.

Please refer to FIG. 1 and FIG. 2 , which are a combined perspective view and an exploded perspective view of an embodiment of the fixing mechanism of the novel multi-cell battery module, respectively. As shown in FIG. 1 and FIG. 2 , the fixing mechanism 1 according to the new embodiment is made of one of plastic or metal materials, and the fixing mechanism 1 includes a plurality of battery fixing brackets 10 , and each battery fixing bracket 10 is respectively It includes a first fixing unit 11 and a second fixing unit 13 .

Multiple groups of battery holders 10 are connected in series. Wherein, the first fixing unit 11 of each battery holder 10 faces and is connected to the second fixing unit 13 of the battery holder 10 of another adjacent group.

Please refer to FIG. 3 and FIG. 4 , which are a first-view perspective view and a second-view perspective view of the first fixing unit of the fixing mechanism of the novel multi-cell battery module, respectively. As shown in FIGS. 3 and 4 , the first fixing unit 11 includes an outer surface 112 and an inner surface 114 , wherein at least one concave portion 111 is provided on the outer surface 112 . The center position of the outer surface 112 .

In an embodiment of the present invention, the recessed portion 111 includes a groove 1111 and at least one positioning groove 1113 , wherein the positioning groove 1113 is connected to the side of the groove 1111 . At least one first accommodating portion 113 is disposed on the inner surface 114 of the first fixing unit 11 for accommodating the battery 15 . Specifically, in the first fixed A first fixing frame 115 is disposed on the inner surface 114 of the unit 11, and a first accommodating portion 113 is formed on the inner surface 114 of the first fixing unit 11 through the first fixing frame 115, wherein one end of the battery 15 can be placed on the first fixing frame 115. inside an accommodating portion 113 .

In an embodiment of the present invention, a first extension portion 117 may be added to the inner surface 114 of the first fixing unit 11 , as shown in FIG. 3 and FIG. /or the setting position of the groove 1111 . Specifically, the first extending portion 117 can be disposed at the center of the inner surface 114 of the first fixing unit 11 , and the number of the first accommodating portions 113 can be plural, and the first extending portion 117 can be annularly disposed around the first extending portion 117 . .

Please refer to FIG. 5 and FIG. 6 , which are a first-view perspective view and a second-view perspective view of the second fixing unit of the novel fixing mechanism, respectively. As shown in FIG. 5 and FIG. 6 , the second fixing unit 13 includes an outer surface 132 and an inner surface 134 , wherein at least one protruding portion 131 is provided on the outer surface 132 , for example, the protruding portion 131 can be provided on the second fixing unit 13 at the center of the outer surface 132.

In an embodiment of the present invention, the protruding portion 131 includes a main body portion 1311 and at least one protruding rib 1313 , wherein the protruding rib 1313 is connected to the side of the main body portion 1311 .

At least one second accommodating portion 133 is disposed on the inner surface 134 of the second fixing unit 13 for accommodating the battery 15 . Specifically, a second fixing frame 135 may be disposed on the inner surface 134 of the second fixing unit 13 , and a second accommodating portion 133 may be formed on the inner surface 134 of the second fixing unit 13 through the second fixing frame 135 , The other end of the battery 15 can be placed in the second accommodating portion 133 .

In an embodiment of the present invention, a second extension portion 137 may be added to the inner surface 134 of the second fixing unit 13 , wherein the arrangement position of the second extension portion 137 corresponds to the arrangement position of the protruding portion 131 and/or the main body portion 1311 . Specifically, the second extension portion 137 may be disposed on the inner surface 134 of the second fixing unit 13 The center position of the second accommodating portion 133 may be plural, and the second accommodating portion 133 may be arranged in a ring around the second extending portion 137 .

Specifically, the first fixing unit 11 and the second fixing unit 13 are provided in pairs to form the battery holder 10 . When the inner surface 114 of the first fixing unit 11 faces the inner surface 134 of the second fixing unit 13 , each of the first accommodating portions 113 of the first fixing unit 11 can face each of the opposite second fixing units 13 respectively. The second accommodating portion 133 forms an accommodating space 14 between each first accommodating portion 113 and each second accommodating portion 133 , and the battery 15 can be disposed in each accommodating space 14 .

In practical application, the battery 15 can be firstly disposed between the first fixing unit 11 and the second fixing unit 13 to form a single battery fixing frame 10 . The outer surfaces 112 of the first fixing units 11 of each group of battery holders 10 face and connect to the outer surfaces 132 of the second fixing units 13 of the adjacent battery holders 10 , so that each group of battery holders The protruding part 131 of the second fixing unit 13 of 10 is inserted into the recess 111 of the first fixing unit 11 of the adjacent battery holder 10, wherein the groove 1111 and the positioning groove 1113 of the first fixing unit 11 are respectively accommodated The main body 1311 and the protruding ribs 1313 of the second fixing unit 13 .

By arranging the positioning grooves 1113 on the outer surface 112 of the first fixing unit 11 and arranging the protruding ribs 1313 on the outer surface 132 of the second fixing unit 13 , the first fixing unit 11 of the battery holder 10 can be restrained from the opposite side. The connection angle of the second fixing unit 13 of another adjacent group of battery fixing brackets 10 . The positioning groove 1113 and the protruding rib 1313 will form a foolproof device, which is beneficial to improve the convenience and efficiency of connecting a plurality of battery holders 10 in series, and can avoid the occurrence of assembly errors.

In addition, after the first fixing unit 11 of the battery holder 10 is connected to the second fixing unit 13 of the battery holder 10 of another adjacent group, the positioning groove 1113 and the protruding rib 1313 can further prevent two adjacent batteries. The fixing brackets 10 are relatively rotated to avoid affecting the connection relationship or the electrical connection relationship between two adjacent battery fixing brackets 10 .

In an embodiment of the present invention, at least one first electrical connection unit 119 may be disposed on the outer surface 112 of the first fixing unit 11 , and at least one second electrical connection unit may be disposed on the outer surface 132 of the second fixing unit 13 139. When the first fixing unit 11 of the battery holder 10 is connected to the second fixing unit 13 of another battery holder 10 , the first electrical connecting unit 119 on the first fixing unit 11 will be electrically connected to the second fixing unit 13 The second electrical connection unit 139 on the top of the battery allows the batteries 15 in the two adjacent battery holders 10 to be electrically connected to each other.

In addition, at least one electrical connection wire or electrical connection bracket (not shown) can also be respectively disposed on the inner surface 114 of the first fixing unit 11 and the inner surface 134 of the second fixing unit 13 to electrically connect a single battery fixing frame 10 For example, the batteries 15 in a single battery holder 10 are connected in series or in parallel.

If the first fixing unit 11 and the second fixing unit 13 are not provided with corresponding positioning grooves 1113 and protruding ribs 1313, the user needs to pay special attention to the fixing of the two batteries when connecting or connecting the two battery holders 10 in series. The angle between the racks 10 is, for example, such that the first electrical connection unit 119 contacts the second electrical connection unit 139 . In addition, when the two battery holders 10 are connected in series and rotate relative to each other, it is also possible that the batteries 15 in the two battery holders 10 cannot be electrically connected. By arranging corresponding positioning grooves 1113 and protruding ribs 1313 on the first fixing unit 11 and the second fixing unit 13, the above situation can be avoided, and the convenience of assembly and the reliability of use can be improved.

In an embodiment of the present invention, a first through hole 1115 is provided on the recess 111 and/or the groove 1111 of the first fixing unit 11 , wherein the first through hole 1115 penetrates through the outer surface of the first fixing unit 11 112 and the inner surface 114 , and a second through hole 1315 is provided on the protruding portion 131 and/or the main body portion 1311 of the second fixing unit 13 , wherein the second through hole 1315 penetrates the outer surface 132 and the inner surface of the second fixing unit 13 134.

Referring to FIG. 2 again, in this embodiment, the fixing mechanism 1 further includes two rod bodies 171 and 172 with male threads (hereinafter referred to as rod bodies) and a nut 173 , wherein the two rod bodies 171 and 172 with male threads are respectively in One end thereof is provided with external thread portions 1711 and 1712 . An internal thread portion (not shown) is provided in the nut 173 . In addition, the three-dimensional cross section of the nut 173 is a polygonal or circular three-dimensional shape.

Each set of battery holders 10 can be assembled in series through the locking between two rods 171 and 172 with male threads and a nut 173 to form a multi-cell battery module. That is, after being assembled in series, each group of battery holders 10 will become each cell of a multi-cell battery module. In the embodiment of FIG. 2 , the position of the nut 173 is selected between the sections of the multi-cell battery module. For example, the nut 173 is arranged between one group of battery holders 10 and another group of adjacent battery holders 10 . Align to the first through holes 1115 of the first fixing units 11 of one group of battery holders 10 and to the second through holes 1315 of the second fixing units 13 of the other adjacent group of battery holders 10 . In an embodiment of the present invention, the lengths of the two rod bodies 171 and 172 can be designed to be equal in length; or, in another embodiment of the present invention, the lengths of the two rod bodies 171 and 172 can be designed to be of unequal length.

When these battery holders 10 are to be assembled in series, the protruding portion 131 of the second fixing unit 13 of each battery holder 10 is inserted into the concave portion 111 of the first fixing unit 11 of the other battery holder 10 . Next, the two rod bodies 171 and 172 pass through the first through holes 1115 of the first fixing unit 11 and the second through holes 1315 of the second fixing unit 13 of the corresponding battery holder 10 respectively, and the external threads of the two rod bodies 171 and 172 The parts 1711 and 1712 and the inner threaded part of the nut 173 can be locked together after being screwed together, so as to fix each battery fixing frame 10 .

Furthermore, the battery holder 10 and the nut 173 of the present invention are assembled by means of injection, heat fusion, ultrasonic implantation, and direct assembly and insertion.

In addition, when the inner surface 114 of the first fixing unit 11 is provided with the first extension portion 117 and the inner surface 134 of the second fixing unit 13 is provided with the second extension portion 137, the first extension portion 137 on the first fixing unit 11 The through hole 1115 can be extended from the recessed portion 111 and/or the groove 1111 to the first extension portion 117, as shown in FIG. 3 and FIG. Or the main body portion 1311 extends to the second extension portion 137, as shown in FIG. 5 and FIG. 6 .

In addition, the recessed portion 111 having the groove 1111 and the positioning groove 1113 and the protruding portion 131 having the main body 1311 and the protruding rib 1313 are only a specific embodiment of the present invention, and are not intended to limit the scope of the present invention. In practical application, as long as the protruding portion 131 of the battery holder 10 is inserted into the concave portion 111 of the adjacent battery holder 10, the connection between two adjacent or connected battery holders 10 can be restricted. angle.

Please refer to FIG. 7 , which is an exploded perspective view of another embodiment of the fixing mechanism of the novel multi-cell battery module. Compared with the embodiment of FIG. 2 , the nuts 173 are selectively arranged between the nodes of the multi-cell battery module. In the embodiment of FIG. 7 , the nuts 173 are selectively arranged in the same section, for example, the nuts 173 are arranged in the same section. between the first fixing unit 11 and the second fixing unit 13 of the battery holder 10 of the battery cell, and are aligned with the first through holes 1115 of the first fixing unit 11 and the second through holes 1315 of the second fixing unit 13 . In this way, when the two rod bodies 171 and 172 respectively pass through the corresponding first through holes 1115 of the first fixing unit 11 and the corresponding second through holes 1315 of the second fixing unit 13 , they can be installed in a specific battery fixing frame. The nuts 173 in the 10 are screwed and locked, so as to fix each battery fixing frame 10 of the multi-cell battery module.

Please refer to FIG. 8 , which is an exploded perspective view of another embodiment of the fixing mechanism of the novel multi-cell battery module. Compared with the above-mentioned embodiment, the locking between two rod bodies 171 and 172 and a nut 173 is used to fix the multi-cell battery module. In the embodiment of FIG. 8 , a first rod body 181 with male threads and A lock between the second rod bodies 183 with female threads is used to fix the multi-cell battery module. The first rod body 181 is provided with an external thread portion 1811 at one end thereof, and the second rod body 183 is provided with an internal thread portion 1831 at one end thereof. When the first rod body 181 and the second rod body 183 pass through the corresponding first through hole 1115 of the first fixing unit 11 and the corresponding second through hole 1315 of the second fixing unit 13 respectively, the external thread 1811 and the corresponding second through hole 1315 can be used. The internal thread parts 1831 are screwed together to fix each battery fixing frame 10 of the multi-cell battery module. Furthermore, the lengths of the first rod body 181 and the second rod body 183 in this embodiment can be designed to be equal or unequal.

Please refer to FIG. 9 , which is a schematic cross-sectional view of an embodiment of the concave portion of the first fixing unit and the protruding portion of the second fixing unit of the novel. In the present invention, the first fixing unit 11 is mainly provided with a concave portion 111 , and the second fixing unit 13 is provided with a protruding portion 131 to limit the connection angle between the first fixing unit 11 and the second fixing unit 13 . Specifically, the first fixing unit 11 and the second fixing unit 13 can insert the protruding portion 131 of the second fixing unit 13 into the recessed portion 111 of the first fixing unit 11 only at a specific angle. In addition, after the protruding portion 131 of the second fixing unit 13 is inserted into the concave portion 111 of the first fixing unit 11 , there will be no relative rotation between the second fixing unit 13 and the first fixing unit 11 .

The cross-sections of the concave portion 111 of the first fixing unit 11 and the protruding portion 131 of the second fixing unit 13 can be non-centrally symmetrical figures with similar shapes, so as to achieve the above-mentioned purpose. Specifically, the cross-section geometry of the recessed portion 111 of the first fixing unit 11 and the protruding portion 131 of the second fixing unit 13 is as shown in FIG. 9 . For example, the cross-section of the recessed portion 1111 and/or the main portion 1311 may be a circle. shape, triangle, quadrangle, pentagon or hexagon and other polygons, and connect one or more positioning grooves 1113 and protruding ribs 1313 .

Of course, in practical application, the concave portion 111 and the protruding portion 131 only need to have the effect of preventing the relative rotation of the first fixing unit 11 and the second fixing unit 13 , and do not necessarily have the positioning grooves 1113 and the protruding ribs 1313 . For example, the cross-sections of the concave portion 111 and the protruding portion 131 can be isosceles triangles, trapezoids, etc. other than equilateral triangles, which can also achieve the purpose of preventing fools and avoiding relative rotation of the first fixing unit 11 and the second fixing unit 13 .

To sum up the above, when the demand for battery capacity increases and the overall length of the battery is getting longer and longer, the length of the rod body has reached the limit and cannot cope with this design. The fixing mechanism of the new multi-cell battery module mainly consists of two The rod body is combined with the nut, and the lengths of the two rod bodies with male threads can be designed to be of equal or unequal length, and can be movably assembled or disassembled with the battery holder to solve the conventional problem of excessively long rods. Fixed length limit.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of implementation of the present invention, that is, all equivalent changes and modifications made in accordance with the shape, structure, feature and spirit described in the claims of the present invention , shall be included in the claims of this new model.

1: Fixed mechanism

10: Battery holder

11: The first fixed unit

13: Second fixed unit

14: Accommodating space

15: Battery

171: Rod body

172: Rod body

1711: External thread part

1712: External thread part

173: Nut

Claims (10)

A fixing mechanism for a multi-cell battery module, comprising: multiple groups of battery fixing frames, each group of the battery fixing frames respectively includes: a first fixing unit, the first fixing unit includes at least one recessed part and a plurality of first container The first accommodating portion is located on an inner surface of the first fixing unit, and the recessed portion is located on an outer surface of the first fixing unit, wherein the recessed portion is provided with a first through hole; a second fixing unit unit, the second fixing unit includes at least one protruding part and a plurality of second accommodating parts, the second accommodating part is located on an inner surface of the second fixing unit, and the protruding part is located in the second fixing unit an outer surface of the unit, and the inner surface of the first fixing unit faces the inner surface of the second fixing unit, and a accommodating space is formed between the first accommodating part and the second accommodating part , to accommodate at least one battery, wherein the protruding part of the second fixing unit is inserted into the recessed part of the first fixing unit, and the protruding part is provided with a second through hole; two rods with male threads, respectively Pass through the first through holes of the corresponding first fixing units and the second through holes of the corresponding second fixing units so as to be fastened to a nut; wherein, the nut is arranged on one of the battery fixing brackets The first through hole of the first fixing unit of the battery holder of the other group is aligned with the battery holder of the other group and aligned to the first hole of the battery holder of the other group of the battery holder. The second perforation of the second fixing unit. The fixing mechanism of the multi-cell battery module according to claim 1, wherein the three-dimensional shape of the nut is The cross section is a three-dimensional shape of a polygon or a circle. The fixing mechanism of the multi-cell battery module according to claim 1, wherein the battery fixing frame and the nut are combined by means of embedding, hot melting, ultrasonic embedding, and direct assembly. The fixing mechanism of the multi-cell battery module according to claim 1, wherein a first extension portion is disposed on the inner surface of the first fixing unit, and the first extension portion corresponds to the outer surface of the first fixing unit The inner surface of the second fixing unit is provided with a second extension, and the second extension corresponds to the position of the protrusion on the outer surface of the second fixing unit. The fixing mechanism of the multi-cell battery module according to claim 4, wherein the first through hole of the first fixing unit extends from the recessed portion to the first extending portion, and the second fixing unit of the second fixing unit The perforation extends from the protruding portion to the second extending portion. The fixing mechanism for a multi-cell battery module according to claim 4, wherein the first accommodating portion is disposed around the first extension portion, and the second accommodating portion is disposed around the second extension around the department. The fixing mechanism of the multi-cell battery module according to claim 1, wherein the lengths of the two rod bodies with male threads are designed to be unequal lengths. The fixing mechanism of the multi-cell battery module according to claim 1, wherein the batteries in the multi-cell battery module are connected in series or in parallel. The fixing mechanism of the multi-cell battery module according to claim 1, wherein the fixing mechanism is made of one of plastic or metal materials. A fixing mechanism for a multi-cell battery module, comprising: Multiple sets of battery holders, each set of the battery holders respectively includes: a first fixing unit, the first fixing unit includes at least one recess and a plurality of first accommodating parts, the first accommodating parts are located in the first accommodating part. An inner surface of a fixing unit, and the recessed portion is located on an outer surface of the first fixing unit, wherein the recessed portion is provided with a first through hole; a second fixing unit, the second fixing unit includes at least one protrusion part and a plurality of second accommodating parts, the second accommodating part is located on an inner surface of the second fixing unit, the protruding part is located on an outer surface of the second fixing unit, and the first fixing unit The inner surface of the second fixing unit faces the inner surface of the second fixing unit, and a accommodating space is formed between the first accommodating portion and the second accommodating portion for accommodating at least one battery, wherein the second accommodating portion The protruding part of the fixing unit is inserted into the concave part of the first fixing unit, and the protruding part is provided with a second through hole; a first rod body with male threads passes through the corresponding first fixing units respectively. The first through holes and the corresponding second through holes of the second fixing units; and a second rod body with female threads, respectively passing through the first through holes of the corresponding first fixing units and the corresponding The second through hole of the second fixing unit, wherein the first rod body with male threads and the second rod body with female threads are screwed together and then locked together.

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