CN115995592A - Stacking equipment, assembly production line of battery pack, assembly method and battery pack - Google Patents

Abstract

The invention relates to the technical field of batteries, and provides a stacking device, an assembly production line of a battery pack, an assembly method and the battery pack. The stacking apparatus is for stacking a plurality of cells to form a battery pack, and includes: the base is used for placing a battery; the positioning mechanism comprises a positioning surface which is used for being attached to the stacking surface of the battery; the alignment mechanism is arranged on the base and is used for being attached to the side face of each battery so as to align each battery; wherein the positioning mechanism is used for clamping the aligned batteries. The plurality of batteries are stacked on the base, the alignment of each battery is realized through the alignment mechanism, and the clamping of each aligned battery is realized through the positioning mechanism, so that the stacking of the battery pack is realized.

Description

Stacking equipment, assembly production line of battery pack, assembly method and battery pack

Technical Field

The present invention relates to the field of battery technologies, and in particular, to a stacking apparatus, an assembly line for a battery pack, an assembly method for the battery pack, and a battery pack.

Background

In the related art, a battery pack is formed by stacking a plurality of batteries, and when the batteries are stacked, there is no stacking auxiliary device formed in the prior art to improve the stacking efficiency of the batteries.

Disclosure of Invention

The invention provides a stacking device, an assembly production line of a battery pack, an assembly method and the battery pack, so as to assist in stacking the battery pack.

According to a first aspect of the present invention, there is provided a stacking apparatus for stacking a plurality of cells to form a battery pack, the stacking apparatus comprising:

the base is used for placing a battery;

the positioning mechanism comprises a positioning surface which is used for being attached to the stacking surface of the battery;

the alignment mechanism is arranged on the base and is used for being attached to the side face of each battery so as to align each battery;

wherein the positioning mechanism is used for clamping the aligned batteries.

The stacking device provided by the embodiment of the invention comprises the base, the positioning mechanism and the alignment mechanism, wherein a plurality of batteries are stacked on the base, the alignment of each battery is realized through the alignment mechanism, and the clamping of each aligned battery is realized by the positioning mechanism, so that the stacking of the battery pack is realized.

According to a second aspect of the present invention, there is provided an assembly line of a battery pack including the above-described stacking apparatus.

The assembly line of the battery pack according to the embodiment of the invention includes a stacking apparatus. The stacking device comprises a base, a positioning mechanism and an alignment mechanism, wherein a plurality of batteries are stacked on the base, alignment of each battery is achieved through the alignment mechanism, and clamping of each aligned battery is achieved through the positioning mechanism, so that stacking of the battery pack is achieved.

According to a third aspect of the present invention, there is provided a method of assembling a battery pack, comprising:

providing a battery having a bus bar;

stacking a plurality of batteries, and enabling the first bus bar of one adjacent battery to be attached to the second bus bar of the other battery;

aligning the individual cells;

clamping the aligned plurality of cells.

According to the method for assembling the battery pack, each battery with the bus bars is stacked, the first bus bars and the second bus bars of two adjacent batteries are attached, and then the plurality of batteries are aligned and clamped, so that stacking of each battery is achieved.

According to a fourth aspect of the present invention, there is provided a battery pack comprising a battery pack assembled by the above-described method of assembling a battery pack.

The battery pack is assembled by the battery pack assembly method, and an assembly production line of the battery pack comprises stacking equipment. The assembling method of the battery pack stacks the batteries with the bus bars, and enables the first bus bars and the second bus bars of the adjacent two batteries to be correspondingly arranged, and then the batteries are aligned and clamped, so that the batteries are stacked.

Drawings

For a better understanding of the present disclosure, reference may be made to the embodiments illustrated in the following drawings. The components in the drawings are not necessarily to scale and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, the relevant elements or components may have different arrangements as known in the art. Furthermore, in the drawings, like reference numerals designate identical or similar parts throughout the several views. Wherein:

FIG. 1 is a schematic diagram of an application architecture of a first state of a stacking device, according to an example embodiment;

FIG. 2 is a schematic diagram of an application architecture of a second state of a stacking device, according to an example embodiment;

FIG. 3 is a schematic diagram showing a mating structure of a positioning slider and a battery of a stacking apparatus according to an exemplary embodiment;

fig. 4 is a schematic view showing a fitting structure of an alignment mechanism of a stacking apparatus and a battery according to an exemplary embodiment;

fig. 5 is a schematic view showing a partially mated structure of an alignment mechanism of a stacking apparatus and a battery according to an exemplary embodiment;

FIG. 6 is a schematic structural view of an alignment mechanism of a stacking apparatus according to an exemplary embodiment;

FIG. 7 is a schematic illustration of a partial application mechanism of an alignment mechanism of a stacking apparatus, according to an example embodiment;

FIG. 8 is a schematic diagram of a partial application architecture of a first state of a stacking device, according to an example embodiment;

FIG. 9 is a schematic view of a partially applied architecture of a first state of a stacking device, according to an example embodiment;

FIG. 10 is a schematic view of a partial application architecture of a second state of a stacking apparatus according to an exemplary embodiment;

FIG. 11 is a schematic view of a partially applied architecture of a second state of a stacking device, according to an example embodiment;

FIG. 12 is a third application architecture diagram of a stacking device, according to an example embodiment;

FIG. 13 is a fourth application architecture diagram of a stacking device, shown in accordance with an exemplary embodiment;

fig. 14 is a schematic structural view of a stopper of a stacking apparatus according to an exemplary embodiment;

fig. 15 is a flowchart illustrating an assembling method of a battery pack according to an exemplary embodiment.

The reference numerals are explained as follows:

1. a battery; 2. a first bus bar; 3. a second bus bar; 4. a circuit board; 5. a signal acquisition end; 6. a housing; 7. a connection part; 8. a tie; 9. a flange edge;

100. A base; 101. positioning a sliding block; 102. a bottom plate; 103. a substrate; 104. a first guide rail; 105. a connecting block; 106. a second guide rail; 107. a gripping part; 108. positioning pressing pliers;

110. a first positioning mechanism; 111. a first positioning surface; 120. a second positioning mechanism; 121. a second positioning surface; 122. a driving mechanism;

130. an alignment mechanism; 131. a driving plate; 1311. a reference surface; 132. a protrusion;

140. a first welding hold-down mechanism; 141. a first connector; 1411. a first connection portion; 1412. a second connecting portion; 142. a first briquette; 1421. a first avoidance space; 1422. a first pressing portion; 143. a first fastener; 144. a first elastic member;

150. a second welding hold-down mechanism; 151. a second connector; 1511. a third connecting portion; 1512. a fourth connecting portion; 152. a second briquetting; 1521. a first connection body; 1522. a second pressing part; 1523. a third pressing portion; 153. a third briquetting; 1531. a second connecting body; 1532. a fourth pressing portion; 1533. a fifth pressing portion; 154. a second fastener; 155. a second elastic member; 156. a notch; 157. a second avoidance space;

160. a limiting piece; 161. an adapting section; 1611. a first shaft section; 1612. a second shaft section; 162. waist-shaped holes; 163. a circular hole; 164. a handle.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, and it is therefore to be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.

In the description of the present disclosure, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance unless explicitly specified or limited otherwise; the term "plurality" refers to two or more than two; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, references to "the/the" object or "an" object are likewise intended to mean one of a possible plurality of such objects.

Unless specified or indicated otherwise, the terms "connected," "fixed," and the like are to be construed broadly and are, for example, capable of being fixedly connected, detachably connected, or integrally connected, electrically connected, or signally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the terms in the present disclosure may be understood by those skilled in the art according to the specific circumstances.

Further, in the description of the present disclosure, it should be understood that the terms "upper", "lower", "inner", "outer", and the like, as described in the example embodiments of the present disclosure, are described with the angles shown in the drawings, and should not be construed as limiting the example embodiments of the present disclosure. It will also be understood that in the context of an element or feature being connected to another element(s) "upper," "lower," or "inner," "outer," it can be directly connected to the other element(s) "upper," "lower," or "inner," "outer," or indirectly connected to the other element(s) "upper," "lower," or "inner," "outer" via intervening elements.

An embodiment of the present invention provides a stacking apparatus, referring to fig. 1 to 14, for stacking a plurality of cells 1 to form a battery pack, the stacking apparatus comprising: a base 100, the base 100 being used for placing the battery 1; the positioning mechanism comprises a positioning surface which is used for being attached to the stacking surface of the battery 1; an alignment mechanism 130, the alignment mechanism 130 is disposed on the base 100, and is used for being attached to the side surface of each battery 1 so as to align each battery 1; wherein the positioning mechanism is used for clamping the aligned batteries 1.

The stacking apparatus of one embodiment of the present invention includes a base 100, a positioning mechanism, and an alignment mechanism 130, a plurality of cells 1 are stacked on the base 100, and alignment of the respective cells 1 is achieved by the alignment mechanism 130, and then clamping of the aligned respective cells 1 is achieved by the positioning mechanism, thereby achieving stacking of a battery pack.

It should be noted that, stacking a plurality of batteries 1 on the base 100 may be achieved, and in a specific stacking process, a mechanical arm may be used to grasp the batteries 1, so that each battery 1 is stacked on the base 100 in sequence. The stack of each cell 1 on the base 100 may be a horizontal stack, or the stack of each cell 1 on the base 100 may be a vertical stack. A horizontal stack may be understood as a stack direction of the battery pack is parallel to the base 100, and at this time, the base 100 may be parallel to a horizontal reference plane, or the base 100 may be disposed obliquely to the horizontal reference plane. A vertical stack is understood to mean that the stacking direction of the battery pack is perpendicular to the base 100.

In one embodiment, when the stacking of the respective batteries 1 on the base 100 is vertical stacking, the positioning mechanism may include only a first positioning mechanism, and after the plurality of batteries 1 are stacked on the base 100 in the vertical direction, the alignment mechanism 130 may compress the respective batteries 1 by the first positioning mechanism after the alignment of the respective batteries 1 is achieved. In some embodiments, the positioning mechanism may include a first positioning mechanism and a second positioning mechanism, the second positioning mechanism may be disposed on the base 100, and after the plurality of batteries 1 are stacked on the second positioning mechanism in the vertical direction, the alignment mechanism 130 may compress each of the batteries 1 through the first positioning mechanism after the alignment of each of the batteries 1 is achieved.

It should be noted that the first positioning mechanism and the second positioning mechanism may be only plate bodies, and the first positioning mechanism may compress the battery 1 under the driving of the mechanical arm, and in some embodiments, it is not excluded that the first positioning mechanism may compress the battery 1 only by self-gravity.

In one embodiment, as shown in connection with fig. 1 and 2, the positioning mechanism comprises: the first positioning mechanism 110, the first positioning mechanism 110 is arranged on the base 100, and the first positioning mechanism 110 comprises a first positioning surface 111; the second positioning mechanism 120, the second positioning mechanism 120 is disposed on the base 100, the second positioning mechanism 120 includes a second positioning surface 121, and the first positioning surface 111 and the second positioning surface 121 are disposed opposite to each other; wherein the first positioning mechanism 110 and the second positioning mechanism 120 are relatively movably disposed to clamp the plurality of batteries 1 between the first positioning surface 111 and the second positioning surface 121. When each battery 1 is horizontally stacked on the base 100, the first positioning mechanism 110 and the second positioning mechanism 120 are used for limiting and clamping the plurality of batteries 1, so that the plurality of batteries 1 can be reliably stacked.

In some embodiments, the first positioning mechanism 110 may be fixed to the base 100, and the first stacked battery 1 may be stacked close to the first positioning mechanism 110. If the battery pack includes the case 6, during stacking, one end plate of the case 6 may be stacked first, at which time the end plate may be fitted with the first positioning mechanism 110, and then stacking of the respective cells 1 is performed along the end plate, and finally stacking of the other end plate of the case 6 is completed, at which time the end plate approaches the second positioning mechanism 120 and moves in a direction approaching the first positioning mechanism 110 through the second positioning mechanism 120, so that the other end plate drives the respective cells 1 to move to thereby achieve clamping of the plurality of cells 1.

In some embodiments, the first and second positioning mechanisms 110 and 120 may be movably disposed with respect to the base 100, and after stacking of the end plates and the batteries 1 is completed, clamping of the plurality of batteries 1 may be achieved by moving the first and second positioning mechanisms 110 and 120.

In one embodiment, for movement of the first positioning mechanism 110 or the second positioning mechanism 120, a drive mechanism 122 may be employed, the drive mechanism 122 may be an electric mechanism, such as an electric push rod mechanism, or the drive mechanism 122 may be a cylinder piston mechanism, or the drive mechanism 122 may be a hydraulic piston mechanism. The telescopic rod of the driving mechanism 122 is in driving connection with the first positioning mechanism 110 or the second positioning mechanism 120, so as to drive the first positioning mechanism 110 or the second positioning mechanism 120 to move relative to the base 100. The first positioning mechanism 110 or the second positioning mechanism 120 may be slidably matched with the base 100 by adopting a sliding rail and sliding block matching structure. In certain embodiments, the drive mechanism 122 does not preclude the use of manual drive structures, such as lead screw structures, and the like.

The specific structure of the first positioning mechanism 110 or the second positioning mechanism 120 is not limited herein, as long as the first positioning surface 111 and the second positioning surface 121 are ensured to be planar.

In one embodiment, as shown in fig. 3, the base 100 is provided with a positioning slider 101 for placing the battery 1, and the positioning slider 101 is movably disposed with respect to the base 100, so that the battery 1 can move with the positioning slider 101 when the battery pack is compressed by the first positioning mechanism 110 and the second positioning mechanism 120, thereby making it possible to avoid direct contact between the battery 1 and the base 100 or to minimize friction between the battery 1 and the base 100.

In one embodiment, when a plurality of batteries 1 are all disposed on the same positioning slide 101, it is also necessary to ensure that the batteries 1 can move relative to the positioning slide 101 when the batteries 1 are pressed.

In one embodiment, the positioning sliders 101 are plural, and each cell 1 corresponds to at least one positioning slider 101 in a direction perpendicular to the stacking direction of the battery pack; along the stacking direction of the battery pack, the length of the positioning slide block 101 attached to the battery 1 is not greater than the thickness of the battery 1, so that each battery 1 can be ensured to correspond to an independent positioning slide block 101, and the battery 1 can be ensured to be reliably attached to each battery 1 without moving relative to the positioning slide block 101.

In one embodiment, the circumferential outer side of the battery 1 is provided with the flange 9, so that the length of the positioning slider 101 attached to the battery 1 in the stacking direction of the battery pack is not greater than the thickness of the battery 1 minus the thickness of the flange, thereby ensuring that the positioning slider 101 avoids the flange 9, as shown in fig. 3.

In one embodiment, each cell 1 may correspond to at least two positioning sliders 101. At least two positioning sliders 101 corresponding to each battery 1 may be disposed along the length direction of the battery 1, and the length direction of the battery 1 may be perpendicular to the stacking direction of the battery pack.

It should be noted that, the positioning slider 101 may be provided with a sliding track, and the base 100 may be provided with a sliding track, where the sliding track and the sliding track cooperate to ensure reliable movement of the positioning slider 101 along the base 100. The extending direction of the sliding rail is the stacking direction of the battery pack.

In one embodiment, as shown in fig. 4-6, the alignment mechanism 130 includes: a driving plate 131, the driving plate 131 being disposed at the base 100, the driving plate 131 including a reference surface 1311, the reference surface 1311 extending in a stacking direction of the battery pack; at least two protrusions 132, each protrusion 132 is provided at a reference surface 1311 at intervals in the stacking direction of the battery pack for fitting with the side surface of the battery 1. By ensuring that the surfaces of the respective protrusions 132 that are attached to the sides of the battery 1 are on the same plane, reliable alignment of the respective batteries 1 of the battery pack is ensured by the respective protrusions 132 being attached to the sides of the battery 1.

It should be noted that, since the plurality of protrusions 132 are provided on the reference surface 1311 of the driving plate 131, the problem that some of the batteries 1 are not aligned due to the contact of one surface with each of the batteries 1 is avoided. In some embodiments, one protrusion 132 on datum 1311 may contact at least two cells 1. In some embodiments, one protrusion 132 on datum 1311 may contact only one cell 1. The plurality of protrusions 132 are more adaptable in arrangement to ensure alignment of different types of batteries 1 while ensuring that the respective protrusions 132 are disposed on the same plane as the surface on which the sides of the batteries 1 are attached.

In one embodiment, the direction in which the reference surface 1311 extends in the stacking direction of the battery pack may be the length direction of the reference surface 1311, and the reference surface 1311 also has a width direction, the width direction of the reference surface 1311 is perpendicular to the length direction of the reference surface 1311, the length of the protrusion 132 in the width direction of the reference surface 1311 may be equal to the width of the reference surface 1311, or the length of the protrusion 132 in the width direction of the reference surface 1311 may be smaller than the width of the reference surface 1311. In some embodiments, it is not precluded that the length of protrusion 132 in the width direction of datum surface 1311 may be greater than the width of datum surface 1311.

It should be noted that, the battery pack includes a plurality of batteries, and a direction in which the plurality of batteries are sequentially arranged is a stacking direction of the battery pack.

In one embodiment, the protrusions 132 are configured to be disposed in a one-to-one correspondence with the batteries 1, that is, when each battery 1 is aligned, each battery 1 corresponds to one protrusion 132, so that each protrusion 132 can be ensured to be in contact with one battery 1, and the use range of the alignment mechanism 130 can be increased on the basis of ensuring reliable alignment of each battery 1.

In one embodiment, the lengths of the respective protrusions 132 in the stacking direction of the battery pack are uniform, i.e., the lengths of the plurality of protrusions 132 in the stacking direction of the battery pack are uniform, so that the alignment mechanism 130 can conveniently achieve reliable alignment of the respective batteries 1 having the same thickness, and can conveniently manufacture the protrusions 132.

In one embodiment, the lengths of at least two protrusions 132 in the stacking direction of the battery pack are not uniform, i.e., the lengths of at least two protrusions 132 of the plurality of protrusions 132 in the stacking direction of the battery pack may be different. The length of some protrusions 132 in the stacking direction of the battery pack may be the same, while the length of other protrusions 132 in the stacking direction of the battery pack may be different, and the design may be adapted to the amount of activity of each battery 1 when compressed, thereby controlling the amount of activity of the battery 1.

In some embodiments, the lengths of the plurality of protrusions 132 in the stacking direction of the battery pack may be all different. The length of the plurality of protrusions 132 in the stacking direction of the battery pack may be gradually increased, and the pressing direction of the battery pack may coincide with the stacking direction of the battery pack, so that the battery 1 at the start of the pressing direction may have the maximum amount of activity while the battery 1 at the end of the pressing direction may have the minimum amount of activity when the battery 1 is pressed.

In one embodiment, the length of the protrusion 132 that is attached to the side of the battery 1 in the stacking direction of the battery pack is not greater than the thickness of the battery 1, so that one protrusion 132 is prevented from contacting two batteries 1, thereby improving the alignment of the battery 1 by the alignment mechanism 130.

Note that, when one protrusion 132 is attached to a plurality of batteries 1, if the degree of uniformity of the batteries 1 is high, the alignment degree of each battery 1 can be ensured, but when the degree of uniformity of the batteries 1 is not high, when one protrusion 132 is attached to a plurality of batteries 1, a problem of misalignment of the batteries 1 may occur. And one protrusion 132 is in contact with one cell 1, since there is no connection portion between the two protrusions 132, manufacturing errors at adjacent positions of the two cells 1 can be ignored, and alignment of the cells 1 can be improved to some extent.

In some embodiments, the circumferential outer side of the battery 1 may have a flange 9, that is, the protrusions 132 need to avoid the flange 9 when the battery 1 is aligned, and thus, each battery 1 needs to correspond to one protrusion 132, where, in the stacking direction of the battery pack, the length of the protrusion 132 that is attached to the side of the battery 1 is equal to or less than the thickness of the battery 1 minus the thickness of the flange 9.

In one embodiment, as shown in fig. 5, along the stacking direction of the battery pack, the protrusion 132 is attached to the side of the battery 1 by a length a, the thickness of the battery 1 is b, the thickness of the flange 9 of the battery 1 is c, and the maximum displacement of the battery 1 along the stacking direction of the battery pack is d, a+d is equal to or less than b-c. While the battery pack is being compressed, some of the cells 1 can move to ensure reliable contact between the cells 1, in this embodiment, the maximum displacement d of the cells 1 along the stacking direction of the battery pack is the maximum distance between the flange edge 9 and the protrusion 132, i.e. the maximum value d that the cells 1 can move along the compressing direction, so that a+d is less than or equal to b-c is required to ensure contact between the protrusion 132 and the side of the cells 1 without interference with the flange edge 9. In this embodiment, the protrusion 132 may be fixedly disposed with respect to the driving plate 131.

Note that, the protrusion 132 may have a rectangular body structure, and in this case, a length a of the protrusion 132, which is attached to the side surface of the battery 1 in the stacking direction of the battery pack, is equal to a length of the protrusion 132 in the stacking direction of the battery pack. In some embodiments, it is not excluded that the protrusion 132 is of a boss structure, i.e., the portion of the protrusion 132 where it is connected to the driving plate 131 has a larger cross-sectional area, but in order to ensure that the protrusion 132 does not interfere with the flange 9, it is necessary to ensure that the portion of the protrusion 132 where it is attached to the side of the battery 1 has a relatively smaller cross-sectional area, and therefore, in this embodiment, the length a where the protrusion 132 is attached to the side of the battery 1 in the stacking direction of the battery pack is defined.

In one embodiment, the protrusion 132 is movably disposed along the stacking direction of the battery pack with respect to the driving plate 131, so that the battery 1 can drive the protrusion 132 to move when the battery pack is compressed, so long as the protrusion 132 does not interfere with the flange 9 of the battery 1, at this time, the thickness of the battery 1 minus the thickness of the flange 9 may be equal, and the length of the protrusion 132 attached to the side of the battery 1 along the stacking direction of the battery pack, that is, the length of the protrusion 132 may be maximized. In some embodiments, the length of the protrusion 132 that engages the side of the cell 1 in the stacking direction of the battery pack may also be less than the thickness of the cell 1 minus the thickness of the flange 9.

When the battery 1 moves with the positioning slider 101, the protrusion 132 is movable relative to the driving plate 131, so that friction between the protrusion 132 and the battery 1 can be avoided, and alignment of the battery 1 during movement can be ensured.

It should be noted that, the protrusion 132 moves relative to the driving plate 131, the protrusion 132 and the driving plate 131 may be matched in a manner of sliding blocks and sliding ways, that is, connection stability of the protrusion 132 and the driving plate 131 may be ensured, and the battery 1 may be ensured to drive the protrusion 132 to move relative to the driving plate 131.

In one embodiment, the driving plate 131 and the protrusion 132 may have two structures that are independently manufactured, and are connected after the independent manufacturing is completed, in which case the driving plate 131 and the protrusion 132 may be fixedly connected, that is, the protrusion 132 may not move relative to the driving plate 131. Alternatively, the protrusion 132 may move relative to the driving plate 131, and the protrusion 132 may be engaged with the driving plate 131 in a manner of being engaged with the slide.

In one embodiment, the driving plate 131 and the protrusion 132 are integrally formed, so that the manufacturing is simple, and the structural stability can be improved.

In one embodiment, the alignment mechanism 130 includes: a driving plate 131, the driving plate 131 including a reference surface 1311, the reference surface 1311 extending in a stacking direction of the battery pack; a protrusion 132, the protrusion 132 being provided on the reference surface 1311 for adhering to the side surface of the battery 1; wherein, along the stacking direction of the battery pack, the length of the protrusion 132 attached to the side of the battery 1 is not greater than the thickness of the battery 1. Since the length of the protrusion 132 attached to the side of the battery 1 is not greater than the thickness of the battery 1 in the stacking direction of the battery pack, the protrusion 132 can be attached to the battery 1 alone, thereby improving the adaptability of the alignment mechanism 130, and thus meeting the alignment requirements of different batteries 1. In this embodiment, a protrusion 132 may be provided on the driving plate 131.

In one embodiment, as shown in fig. 7, the alignment mechanism 130 further includes: the base plate 103, the base plate 103 is detachably mounted on the base 100, and the driving plate 131 is arranged on the base plate, so that the alignment mechanism 130 can be detached from the base 100, and other mechanisms can be given way.

In one embodiment, the base plate 103 of the alignment mechanism 130 is movably disposed relative to the base 100 such that the protrusions 132 on the drive plate 131 can engage the cells 1 to ensure reliable alignment of the individual cells 1.

In one embodiment, the base plate 103 of the alignment mechanism 130 is movably disposed along the stacking direction of the battery pack, so that a space for yielding between the alignment mechanism 130 and the battery pack can be formed for placement of other structures.

In one embodiment, the base plate 103 of the alignment mechanism 130 is movably disposed in a direction approaching or separating from the battery pack so that the protrusions 132 on the driving plate 131 are fitted with the batteries 1, thereby ensuring reliable alignment of the respective batteries 1.

In one embodiment, as shown in fig. 7, the stacking apparatus further includes: the base plate 102, the base plate 103 sets up on the base plate 102, be provided with first guide rail 104 on the base 100, first guide rail 104 extends along the stacking direction of group battery, be provided with connecting block 105 on the first guide rail 104, be provided with second guide rail 106 on the connecting block 105, second guide rail 106 extends along the direction that is close to the group battery, the base plate 102 sets up on second guide rail 106, the base plate 102 can drive the base plate 103 and follow second guide rail 106 and the connecting block 105 can drive the base plate 102 and follow first guide rail 104 and remove, i.e. make the base plate 103 set up along the stacking direction of group battery movably, and the base plate 103 is set up along being close to or keeping away from the direction of group battery movably.

In one embodiment, the number of the substrates 103 may be two, the two substrates 103 are respectively located at two opposite sides of the battery pack, and the alignment mechanisms 130 are disposed on the two substrates 103, so that the alignment mechanisms 130 at two sides of the battery pack can perform simultaneous alignment operation, thereby achieving reliable alignment of the respective batteries 1. In some embodiments, the alignment of the battery 1 may be performed using only one alignment mechanism 130.

In one embodiment, the stacking apparatus further includes a welding press mechanism provided to the base 100 for pressing the first bus bar 2 to the second bus bar 3 to perform welding of the first bus bar 2 and the second bus bar 3 by the welding mechanism. And/or the welding hold-down mechanism is used for pressing the signal acquisition end 5 of the circuit board 4 to the first busbar 2, so that the signal acquisition end 5 and the first busbar 2 are welded through the welding mechanism. The first bus bar 2 is pressed to the second bus bar 3 so that the first bus bar 2 is fitted to the second bus bar 3.

When the batteries 1 are stacked, the batteries 1 are provided with bus bars, and when the alignment mechanism 130 is attached to the side surfaces of the respective batteries 1, the alignment mechanism 130 is disposed so as to avoid the bus bars located on the side surfaces of the batteries 1, that is, the alignment mechanism 130 is disposed so as to oppose the bus bars located on the side surfaces of the batteries 1. After the compression of the battery pack is completed, the first bus bar 2 of the adjacent two batteries 1 can be pressed to the second bus bar 3 by the welding compression mechanism, so that the subsequent welding is performed. After the welding of the first busbar 2 and the second busbar 3 is completed, the signal acquisition end 5 of the circuit board 4 can be pressed to the first busbar 2 by the welding pressing mechanism, so that the welding of the signal acquisition end 5 and the first busbar 2 is realized by the welding mechanism.

In one embodiment, referring to fig. 8 and 9, the welding hold-down mechanism includes: the first welding hold-down mechanism 140, the first welding hold-down mechanism 140 is used for pressing the first busbar 2 to the second busbar 3, the first welding hold-down mechanism 140 includes: a first connector 141; a first pressing block 142, the first pressing block 142 is disposed on the first connecting member 141, and the first pressing block 142 is configured to be pressed on the first busbar 2; the first pressing block 142 is provided with a first avoiding space 1421 exposing the first busbar 2, so that the welding mechanism can weld the first busbar 2 and the second busbar 3.

It should be noted that the first busbar 2 and the second busbar 3 belong to two batteries respectively, and the first busbar 2 is pressed on the second busbar 3, and the first pressing block 142 presses the first busbar 2 onto the second busbar 3, so that a good welding effect can be ensured when the welding mechanism welds the first busbar 2 and the second busbar 3.

The first busbar 2 and the second busbar 3 are located at the side of the battery pack, that is, the first press block 142 achieves compression of the first busbar 2 and the second busbar 3 at the side, so that welding of the first busbar 2 and the second busbar 3 is facilitated.

In one embodiment, as shown in fig. 8, the first connector 141 includes: the battery pack comprises a first connecting part 1411 and a second connecting part 1412, wherein the second connecting part 1412 is connected with the first connecting part 1411, and an included angle is formed between the second connecting part 1412 and the first connecting part 1411, so that the second connecting part 1412 is arranged opposite to the side part of the battery pack; wherein the first pressing block 142 is disposed on the second connection portion 1412. The first and second connection portions 1411 and 1412 are substantially perpendicular. The first connection 1411 is provided on the substrate 103 of the first solder hold-down mechanism 140.

In one embodiment, the first avoiding space 1421 is a notch, so that two opposite first pressing portions 1422 forming the first avoiding space 1421 are pressure-equalized on the same first busbar 2, so that on the basis of ensuring a sufficient pressing force, the welding mechanism can be ensured to weld the first busbar 2 and the second busbar 3 through the first avoiding space 1421 on the first pressing block 142.

In one embodiment, the first relief space 1421 may be a through hole, i.e., the first relief space 1421 may be located in the middle of the first press block 142.

In one embodiment, the number of the first avoiding spaces 1421 is at least two, so that the first pressing blocks 142 are pressed on the at least two first bus bars 2, and thus the pressing of the at least two first bus bars 2 can be achieved through one first welding pressing mechanism 140.

In one embodiment, the first pressing block 142 is of a central symmetrical structure, so that not only the strength of the first pressing block 142 can be ensured, but also the first pressing block 142 can be ensured to reliably press the first busbar 2.

In one embodiment, as shown in fig. 9, two first avoiding spaces 1421 are provided on the first pressing block 142, and the first avoiding spaces 1421 are notches, so that 4 first pressing portions 1422 are formed on the first pressing block 142, and two pairs of first pressing portions 1422 respectively press two first bus bars 2.

In one embodiment, the first press block 142 is detachably provided on the first connector 141.

In some embodiments, the first press block 142 and the first connector 141 may be non-detachably connected, the first press block 142 and the first connector 141 may be integrally formed, or the first press block 142 and the first connector 141 may be welded.

In one embodiment, the first pressing block 142 is movably disposed with respect to the first connecting member 141, so that position adjustment can be performed during the process of pressing the first bus bar 2 by the first pressing block 142, and reliable adhesion between the first bus bar 2 and the second bus bar 3 is ensured.

It should be noted that, due to the structural limitation of the first busbar 2 and the second busbar 3, there may be a positional deviation in the process of pressing the first pressing block 142 on the first busbar 2, so that the first busbar 2 cannot be reliably attached to the second busbar 3. In this embodiment, the first pressing block 142 is movably disposed relative to the first connecting member 141, so that the first pressing block 142 is pressed on the first busbar 2, and thus, the position adjustment can be performed, and the reliable attachment between the first busbar 2 and the second busbar 3 is ensured, so as to ensure the subsequent welding quality.

In one embodiment, as shown in fig. 8 and 9, the first welding hold-down mechanism 140 further comprises: a first fastener 143, the first pressing block 142 being disposed on the first connector 141 by the first fastener 143; the first elastic member 144 is sleeved on the first fastening member 143. The first fastening member 143 is fixed on the first connecting member 141, and the first elastic member 144 is pressed between the first pressing block 142 and the first fastening member 143, so that the first elastic member 144 can be compressed when the first pressing block 142 moves relative to the first connecting member 141, and the first elastic member 144 can not only realize a buffering effect, but also avoid excessive movement of the first pressing block 142.

In one embodiment, the first press block 142 may be coupled to the first coupling member 141 by at least two first fasteners 143 and corresponding first elastic members 144.

In one embodiment, the first fastening member 143 may be a bolt, the first fastening member 143 is fixedly coupled with the first coupling member 141, and the first pressing block 142 is movably disposed with respect to the first fastening member 143, and the first elastic member 144 may be a spring, or may be a rubber structure, etc.

In one embodiment, the base plate 103 of the first welding pressing mechanism 140 is movably disposed with respect to the base 100, so that the base plate 103 drives the first welding pressing mechanism 140 to press the first busbar 2 onto the second busbar 3.

In one embodiment, the base plate 103 of the first welding press mechanism 140 is movably disposed along the stacking direction of the battery pack, so that a space for letting off is formed between the first welding press mechanism 140 and the battery pack for placing other structures.

In one embodiment, the base plate 103 of the first welding press mechanism 140 is movably disposed in a direction approaching or moving away from the battery pack such that the first welding press mechanism 140 presses the first bus bar 2 against the second bus bar 3.

In one embodiment, as shown in fig. 8, the base 100 is provided with a bottom plate 102, the base plate 103 of the first welding hold-down mechanism 140 is provided on the bottom plate 102, the base 100 is provided with a first guide rail 104, the first guide rail 104 extends along the stacking direction of the battery pack, the first guide rail 104 is provided with a connecting block 105, the connecting block 105 is provided with a second guide rail 106, the second guide rail 106 extends along the direction close to the battery pack, the bottom plate 102 is provided on the second guide rail 106, the bottom plate 102 can drive the base plate 103 to move along the second guide rail 106, and the connecting block 105 can drive the base plate 102 to move along the first guide rail 104, i.e., the base plate 103 is movably arranged along the stacking direction of the battery pack, and the base plate 103 is movably arranged along the direction close to or away from the battery pack.

In one embodiment, the number of the first welding pressing mechanisms 140 is plural, and the plurality of first welding pressing mechanisms 140 are all disposed on the substrate 103, so that pressing of the plurality of first bus bars 2 can be achieved at a time, thereby improving welding efficiency of the first bus bars 2 and the second bus bars 3.

In one embodiment, the number of the substrates 103 of the first welding hold-down mechanism 140 may be two, the two substrates 103 are respectively located at two opposite sides of the battery pack, and the two substrates 103 are both provided with the first welding hold-down mechanism 140, so that the first welding hold-down mechanisms 140 at two sides of the battery pack can be simultaneously pressed, thereby realizing the fixation of the battery pack, and the battery pack is integrally fixed without additionally providing a fixing structure.

In one embodiment, as shown in fig. 10 and 11, the soldering press mechanism includes a second soldering press mechanism 150, the second soldering press mechanism 150 is for pressing the signal collecting end 5 of the circuit board 4 onto the first busbar 2, and the second soldering press mechanism 150 includes: a second connection member 151; a second pressing block 152, the second pressing block 152 being disposed on the second connection member 151; the third pressing block 153, the third pressing block 153 is arranged on the second connecting piece 151, and the second pressing block 152 and the third pressing block 153 are arranged on the same signal acquisition end 5 in a pressing mode; wherein the second press block 152 and the third press block 153 expose a portion of the signal collection terminal 5 for the welding mechanism to weld the signal collection terminal 5 and the first bus bar 2.

It should be noted that, the second pressing block 152 and the third pressing block 153 are pressed on the same signal collecting end 5, so that the signal collecting end 5 and the first busbar 2 can reliably contact with each other, and a reliable welding connection surface is formed between the signal collecting end 5 and the first busbar 2 when the signal collecting end 5 and the first busbar 2 are welded through the welding mechanism, for example, when the signal collecting end 5 and the first busbar 2 are subjected to laser welding, the signal collecting end 5 and the first busbar 2 need to be reliably attached.

The signal acquisition end 5 and the first busbar 2 are located at the side of the battery pack, namely, the second pressing block 152 and the third pressing block 153 achieve compression of the side to the signal acquisition end 5 and the first busbar 2, so that welding of the signal acquisition end 5 and the first busbar 2 is facilitated.

In one embodiment, as shown in fig. 11, the second connection member 151 includes: the third connection part 1511 and the fourth connection part 1512, the fourth connection part 1512 is connected with the third connection part 1511, and an included angle is formed between the fourth connection part 1512 and the third connection part 1511, so that the fourth connection part 1512 is arranged opposite to the side part of the battery pack; wherein the second press 152 and the third press 153 are disposed on the fourth connection portion 1512. The third connection portion 1511 and the fourth connection portion 1512 are substantially perpendicular. The third connection portion 1511 is provided on the substrate 103.

In one embodiment, the third connection portion 1511 may be a connection block, the fourth connection portion 1512 may be at least two, and the second press block 152 is disposed on the at least two fourth connection portions 1512. The third press blocks 153 are disposed on at least two fourth connection portions 1512. The second press blocks 152 are disposed on at least two fourth connection portions 1512 by the second fasteners 154 and the second elastic members 155. The third pressing blocks 153 are provided on at least two fourth connection portions 1512 by the second fastening members 154 and the second elastic members 155.

In one embodiment, the circuit board 4 may be a flexible printed circuit board, i.e., FPC (Flexible Printed Circuit), and the circuit board 4 may include voltage acquisition, temperature acquisition, and the like. The signal acquisition terminal 5 may be a nickel plate.

In one embodiment, as shown in fig. 10 and 11, the second pressing block 152 is spaced apart from the third pressing block 153 to be respectively pressed at opposite ends of the signal acquisition end 5; wherein, form the second between second briquetting 152 and the third briquetting 153 and dodge the space 157 for exposing signal acquisition end 5 to can make welding mechanism pass through the space 157 and weld signal acquisition end 5 and first busbar 2 dodge.

The second pressing block 152 and the third pressing block 153 are pressed on the signal acquisition end 5 at intervals, so that the signal acquisition end 5 can be reliably contacted with the first busbar 2, and reliable welding between the signal acquisition end 5 and the first busbar 2 can be ensured when the signal acquisition end 5 and the first busbar 2 are welded in a laser welding mode or the like.

In one embodiment, the second press 152 is detachably disposed on the second connection 151. The third pressing block 153 is detachably provided on the second connection member 151.

In some embodiments, the second press 152 may be non-detachably connected with the second connection 151, and the third press 153 may be non-detachably connected with the second connection 151. The second pressing block 152 and the second connection member 151 may be integrally formed, or the second pressing block 152 and the second connection member 151 may be welded. The third pressing block 153 and the second connection member 151 may be integrally formed, or the third pressing block 153 and the second connection member 151 may be welded.

In one embodiment, as shown in fig. 11, the second pressing block 152 includes a first connection body 1521, a second pressing portion 1522, and a third pressing portion 1523, where the first connection body 1521 is disposed on the second connection member 151, the second pressing portion 1522 and the third pressing portion 1523 are disposed on the first connection body 1521, and the second pressing portion 1522 and the third pressing portion 1523 are configured to be pressed on the signal collecting terminal 5.

In some embodiments, the second pressing portion 1522 and the third pressing portion 1523 may be pressed on the same signal acquisition terminal 5, so as to ensure reliable pressing of the signal acquisition terminal 5.

In some embodiments, the second pressing portion 1522 and the third pressing portion 1523 are disposed at intervals, so as to be used for pressing the two signal acquisition terminals 5, respectively, so that the pressing of the two signal acquisition terminals 5 can be achieved by one second welding pressing mechanism 150.

In one embodiment, as shown in fig. 11, the third press block 153 includes a second connection body 1531, a fourth pressing part 1532, and a fifth pressing part 1533, the second connection body 1531 is disposed on the second connection member 151, the fourth pressing part 1532 and the fifth pressing part 1533 are disposed on the second connection body 1531, and the fourth pressing part 1532 and the fifth pressing part 1533 are for pressing on the signal collecting terminal 5.

In some embodiments, the fourth compression portion 1532 and the fifth compression portion 1533 may be compressed on the same signal acquisition end 5 to ensure reliable compression of the signal acquisition end 5.

In some embodiments, the fourth pressing part 1532 and the fifth pressing part 1533 are spaced apart to press the two signal acquisition terminals 5, respectively, so that the pressing of the two signal acquisition terminals 5 can be achieved by one second welding pressing mechanism 150.

In one embodiment, the second pressing portion 1522 of the second pressing block 152 and the fourth pressing portion 1532 of the third pressing block 153 are pressed on one signal acquisition end 5 at the same time, and a second avoidance space 157 is formed between the second pressing portion 1522 and the fourth pressing portion 1532. The third pressing portion 1523 of the second pressing block 152 and the fifth pressing portion 1533 of the third pressing block 153 are simultaneously pressed on the other signal acquisition end 5, and a second avoiding space 157 is formed between the second pressing portion 1522 and the fourth pressing portion 1532.

In certain embodiments, it is not excluded that the second press 152 and the third press 153 further comprise further pressing parts, so as to press the further signal acquisition end 5.

In one embodiment, as shown in fig. 10, the second pressing portion 1522 and the third pressing portion 1523 are provided with a notch 156 toward one end of the signal collecting end 5, so as to reduce the contact area between the second pressing portion 1522 and the third pressing portion 1523 and the signal collecting end 5, and avoid excessively pressing the signal collecting end 5 on the basis of ensuring the structural strength of the second pressing block 152.

In one embodiment, as shown in fig. 10, the end of the fourth pressing portion 1532 and the fifth pressing portion 1533 facing the signal collecting end 5 is provided with a notch 156, so that the contact area between the fourth pressing portion 1532 and the fifth pressing portion 1533 and the signal collecting end 5 is reduced, and excessive pressing of the signal collecting end 5 can be avoided on the basis of ensuring the structural strength of the third pressing block 153.

In one embodiment, the notch 156 of the second pressing portion 1522 is disposed away from the notch 156 of the fourth pressing portion 1532, and the notch 156 of the third pressing portion 1523 is disposed away from the notch 156 of the fifth pressing portion 1533.

In one embodiment, the second pressing block 152 is movably disposed with respect to the second connecting member 151, and/or the third pressing block 153 is movably disposed with respect to the second connecting member 151, so that position adjustment can be performed during the process of pressing the second pressing block 152 and the third pressing block 153 against the signal collecting terminal 5, and reliable attachment between the signal collecting terminal 5 and the first busbar 2 is ensured.

It should be noted that, since the signal collecting end 5 is thin, there may be a positional deviation in the process of pressing the second pressing block 152 and the third pressing block 153 against the signal collecting end 5, so that the signal collecting end 5 cannot be reliably attached to the first busbar 2. In this embodiment, the second pressing block 152 is movably disposed relative to the second connecting member 151, and the third pressing block 153 is movably disposed relative to the second connecting member 151, so that the second pressing block 152 and the third pressing block 153 can be pressed and arranged at the signal collecting end 5, and position adjustment can be performed, so that reliable attachment between the signal collecting end 5 and the first busbar 2 is ensured, and subsequent welding quality is ensured.

In one embodiment, as shown in fig. 10, the second welding hold-down mechanism 150 further comprises: at least two second fastening members 154, the second pressing block 152 is disposed on the second connection member 151 by at least one second fastening member 154, and the third pressing block 153 is disposed on the second connection member 151 by at least one second fastening member 154; at least two second elastic members 155, the second elastic members 155 are sleeved on the corresponding second fastening members 154. The second fastening member 154 is fixed on the second connecting member 151, and the second elastic member 155 is pressed between the second pressing block 152 and the second fastening member 154, so that the second elastic member 155 can be compressed when the second pressing block 152 moves relative to the second connecting member 151, and the second elastic member 155 can realize a buffering effect and can avoid excessive movement of the second pressing block 152. Correspondingly, the second elastic member 155 is pressed between the third pressing block 153 and the second fastening member 154, so that the second elastic member 155 can be compressed when the third pressing block 153 moves relative to the second connecting member 151, and the second elastic member 155 can realize a buffering effect and can avoid overlarge movement of the third pressing block 153.

In one embodiment, the second press 152 may be coupled to the second coupling 151 by at least two second fasteners 154 and corresponding second elastic members 155. The third press block 153 may be coupled to the second coupling member 151 by at least two second fastening members 154 and corresponding second elastic members 155.

In one embodiment, the second fastening member 154 may be a bolt, the second fastening member 154 is fixedly coupled with the second coupling member 151, and the second pressing block 152 and the third pressing block 153 are movably disposed with respect to the second fastening member 154, and the second elastic member 155 may be a spring, or may be a rubber structure, etc.

In one embodiment, the second connection 151 is disposed on the base plate 103 of the second solder hold-down mechanism 150; the substrate 103 is movably disposed relative to the base 100, so that the substrate 103 drives the second welding pressing mechanism 150 to press the signal collecting end 5 onto the first busbar 2.

In one embodiment, the base plate 103 of the second welding press mechanism 150 is movably disposed along the stacking direction of the battery pack, so that a space for letting off is formed between the second welding press mechanism 150 and the battery pack for placing other structures.

In one embodiment, the base plate 103 of the second welding press mechanism 150 is movably disposed in a direction approaching or moving away from the battery pack, so that the second welding press mechanism 150 presses the signal collection terminal 5 onto the first bus bar 2.

In one embodiment, as shown in fig. 10, the base 100 is provided with a bottom plate 102, the base plate 103 of the second welding pressing mechanism 150 is provided on the bottom plate 102, the base 100 is provided with a first guide rail 104, the first guide rail 104 extends along the stacking direction of the battery pack, the first guide rail 104 is provided with a connecting block 105, the connecting block 105 is provided with a second guide rail 106, the second guide rail 106 extends along the direction close to the battery pack, the bottom plate 102 is provided on the second guide rail 106, the bottom plate 102 can drive the base plate 103 to move along the second guide rail 106, and the connecting block 105 can drive the base plate 102 to move along the first guide rail 104, i.e., the base plate 103 is movably arranged along the stacking direction of the battery pack, and the base plate 103 is movably arranged along the direction close to or away from the battery pack. In some embodiments, the stacking apparatus may further include positioning clamps 108, the positioning clamps 108 being configured to secure the base plate 102 to the base 100, and the positioning clamps 108 being configured to provide a non-fixed arrangement of the base plate 102 relative to the base 100 when movement of the base plate 102 along the second rail 106 is desired. The positioning press 108 may be a fixed structure in the technologies of telescopic structure, press block structure, etc., and is not limited herein.

In one embodiment, the number of the second welding pressing mechanisms 150 is plural, and the plurality of second welding pressing mechanisms 150 are all disposed on the substrate 103, so that pressing of the plurality of signal collecting terminals 5 can be achieved at a time, thereby improving welding efficiency of the signal collecting terminals 5 and the first bus bar 2.

In one embodiment, the number of the substrates 103 of the second welding hold-down mechanism 150 may be two, the two substrates 103 are respectively located at two opposite sides of the battery pack, and the two substrates 103 are both provided with the second welding hold-down mechanism 150, so that the second welding hold-down mechanisms 150 at two sides of the battery pack can be simultaneously pressed, thereby realizing the fixation of the battery pack without additionally providing a fixing structure for integrally fixing the battery pack.

In some embodiments, the substrate 103 of the first welding press mechanism 140 and the substrate 103 of the second welding press mechanism 150 may be the same substrate, i.e., after the first welding press mechanism 140 completes pressing, the first welding press mechanism 140 may be removed from the substrate and the second welding press mechanism 150 may be mounted on the substrate 103. In some embodiments, the substrate 103 of the alignment mechanism 130 and the substrate 103 of the first welding press mechanism 140 and the substrate 103 of the second welding press mechanism 150 may be the same substrate, and the alignment mechanism 130 may be mounted on one substrate simultaneously with the first welding press mechanism 140 or the second welding press mechanism 150. As shown in connection with fig. 2, the second solder hold-down mechanism 150 and the alignment mechanism 130 may share a single substrate 103.

In some embodiments, the substrate 103 of the first welding press mechanism 140 and the substrate 103 of the second welding press mechanism 150 may be two substrates, and the substrate 103 of the first welding press mechanism 140 and the substrate 103 of the second welding press mechanism 150 may be detachably disposed on the base plate 102, so that after the first welding press mechanism 140 completes the pressing, the substrate 103 of the first welding press mechanism 140 may be detached from the base plate 102, and the substrate 103 of the second welding press mechanism 150 may be mounted on the base plate 102. The substrate 103 of the alignment mechanism 130 may not be the same as the substrate 103 of the first soldering pressing mechanism 140 and the substrate 103 of the second soldering pressing mechanism 150, and the substrate 103 of the alignment mechanism 130 may be detached directly from the base plate 102.

It should be noted that, the alignment mechanism 130, the first welding pressing mechanism 140, and the second welding pressing mechanism 150 may be selectively mounted on the base 100, i.e. the detachment and installation of each mechanism may be achieved according to a specific stacking process.

In some embodiments, the substrate 103 may further be provided with a gripping portion 107, where the gripping portion 107 is used to connect with an external mechanism, so that the substrate 103 may be conveniently removed from the base 100, and the gripping portions 107 may be at least two.

In one embodiment, as shown in fig. 12, the stacking apparatus further includes: the limiting piece 160, the limiting piece 160 spans across a plurality of batteries 1 of the battery pack, and two ends of the limiting piece 160 are respectively used for connecting two opposite connecting parts 7 of the shell 6 of the battery pack so as to avoid deformation of the battery pack caused by the binding belt 8. By crossing the limiting member 160 over the plurality of cells 1 of the battery pack and connecting the two opposite connecting portions 7 of the housing 6 at the two ends of the limiting member 160, when the battery pack is fastened by the tie 8, the problem of deformation of the housing 6 due to excessive fastening force of the tie 8 can be prevented due to the limiting effect of the limiting member 160.

After the plurality of batteries 1 are stacked, the plurality of batteries 1 are positioned in the case 6, and the case 6 is wound and fastened by the tie 8, as shown in fig. 13. In order to ensure a degree of fit between the plurality of batteries 1, the tightening force of the tie 8 may be relatively large. In this embodiment, the integral limiting member 160 is connected to the two opposite connecting portions 7 of the housing 6, so that the limiting member 160 forms a limiting structure, i.e. can form a reverse force with the tightening force, and even if the tightening force applied in the process of tightening the tie 8 is large, the battery pack cannot be deformed.

In one embodiment, the housing 6 includes two opposite end plates, between which the plurality of batteries 1 are clamped, and both ends of the stopper 160 are connected to the two opposite end plates, respectively, i.e., each end plate is provided with a connection portion 7, respectively. In some embodiments, the housing 6 may further include two side cover plates, which are disposed opposite to each other, so as to achieve reliable enclosure of the plurality of cells 1 with the two end plates, and the tie wrap 8 is wound around the two end plates and the two side cover plates, thereby fastening the plurality of cells 1, as shown in fig. 13.

It should be noted that the limiting member 160 spans across the plurality of cells 1 of the battery pack, that is, the limiting member 160 needs to connect the opposite end plates so as to clamp the plurality of cells between the opposite end plates, and the limiting member 160 may be connected to the top of the two end plates, as shown in fig. 12. In some embodiments, it is not precluded that the stop 160 is attached to the side of the end plate, in which case a portion of the stop 160 may be located above the battery pack, or the stop 160 may be located entirely laterally of the battery pack.

In one embodiment, the stopper 160 may be a stopper rod that spans the plurality of cells 1 of the battery pack, and that extends in the stacking direction of the battery pack, i.e., the length direction of the stopper rod may be the stacking direction of the battery pack.

It should be noted that the limit rod may be a rod-shaped structure, and the rod-shaped structure may be a hollow rod or a solid rod, which is not limited herein. In some embodiments, the stop bar may be a generally plate-like structure where the stop of the housing 6 is achieved. In one embodiment, the limiting rod is of an integrally formed structure, so that the forming process is simple, and the structural strength can be ensured.

In one embodiment, the limiting member 160 and the connecting portion 7 may be connected by a fastener, for example, holes are formed on the limiting member 160 and the housing 6, that is, the connecting portion 7 may be provided with holes, and the fastener is inserted into the holes of the limiting member 160 and the housing 6, so that the connection between the limiting member 160 and the connecting portion 7 is achieved. The fastening member may be a threaded connection such as a bolt or a screw, or may be a pin, a key, or the like, as long as the connection between the stopper 160 and the connecting portion 7 is ensured.

In one embodiment, the limiting member 160 is used for being clamped with the connecting portion 7, so that not only is connection convenient, but also the subsequent detachment of the limiting member 160 is facilitated.

In one embodiment, two ends of the limiting member 160 are respectively provided with an adapting portion 161, and the two adapting portions 161 are respectively used for connecting the two connecting portions 7, so that the limiting member 160 is directly connected with the connecting portions 7 through the adapting portions 161 without using external components, and the structure can be simplified. The fitting portion 161 and the connection portion 7 may be a protrusion and groove fitting structure, or the fitting portion 161 and the connection portion 7 may be a protrusion and through hole fitting structure, or the fitting portion 161 and the connection portion 7 may be a snap-fit and snap-fit fitting, or the fitting portion 161 and the connection portion 7 may be surface-to-surface bonding.

In one embodiment, the adapting portion 161 and the connecting portion 7 are matched structures of protrusions and installation spaces, that is, one of the adapting portion 161 and the connecting portion 7 is a protrusion, the other is an installation space, the protrusion is matched with the installation space, and on the basis of ensuring connection stability, simplification of the structure can be ensured.

In some embodiments, the protrusions may be columnar structures, and the mounting space may be a hole-like structure, with the columnar structures interposed within the hole-like structure to effect the connection. The columnar structure may be a circular cylinder, the hole-like structure may be a circular hole, or the columnar structure may be a rectangular cylinder, and the hole-like structure may be a rectangular hole, which is not limited herein.

In one embodiment, the protrusion is a limiting shaft, the installation space is an installation hole, and the limiting shaft is inserted in the installation hole, so that the connection between the limiting member 160 and the housing 6 is realized, and the structure is simple, and the connection and the disassembly of the limiting member 160 can be facilitated. The limiting shaft may be a cylindrical structure or a polygonal structure, for example, a rectangular columnar structure. The limiting shaft can be a columnar structure with consistent cross sectional areas at all positions, and can also be a columnar structure with a plurality of different sizes.

In some embodiments, the adapting portion 161 may be a positioning shaft, and the connecting portion 7 is a mounting hole, and the adapting portion 161 of the positioning member 160 is directly inserted into the connecting portion 7, so as to achieve reliable mounting.

In some embodiments, the adapting portion 161 may be a mounting hole, and the connecting portion 7 is a limiting shaft, and the adapting portion 161 of the limiting member 160 is used to insert the connecting portion 7, so as to achieve reliable mounting. The limit shaft on the housing 6 may be a peripheral component, i.e. it may be removed after use is completed, in some embodiments it is not excluded that the limit shaft on the housing 6 may be part of the housing 6.

In one embodiment, as shown in fig. 14, at least one of the two restraining shafts includes a first shaft segment 1611 and a second shaft segment 1612 that are connected, the cross-sectional area of the first shaft segment 1611 is larger than the cross-sectional area of the second shaft segment 1612, and the second shaft segment 1612 is configured to be inserted into the mounting hole.

When the adapting portion 161 is a limiting shaft, the first shaft section 1611 is used for being connected to the limiting member 160, at this time, in order to ensure structural stability of the limiting member 160 and the adapting portion 161, it is necessary to ensure that the first shaft section 1611 has enough strength to avoid damage, after all, the adapting portion 161 is a part of the limiting member 160, the second shaft section 1612 is used for realizing detachable connection with the housing 6, the torque exerted on the first shaft section 1611 by the fastening force exerted by the fastening belt 8 is larger, and the second shaft section 1612 is relatively smaller, so that the cross-sectional area of the first shaft section 1611 is larger than that of the second shaft section 1612, and the strength of the first shaft section 1611 is larger than that of the second shaft section 1612.

When the connecting portion 7 is a limiting shaft, the first shaft segment 1611 is used for being connected to the housing 6, so that in order to ensure structural stability of the limiting member 160 and the connecting portion 7, it is required to ensure that the first shaft segment 1611 has enough strength to avoid damage.

In one embodiment, the first shaft segment 1611 is a cylindrical structure and the second shaft segment 1612 is a cylindrical structure.

In one embodiment, as shown in fig. 14, the adapting portion 161 is a limiting shaft, the limiting member 160 is provided with at least one kidney-shaped hole 162, and the limiting shaft is installed in the kidney-shaped hole 162; the position of the limiting shaft is adjustable relative to the kidney-shaped hole 162, so that the precision requirement of the structure can be reduced, and the assembly efficiency of the limiting member 160 and the battery module can be improved.

It should be noted that, the length direction of the kidney-shaped hole 162 may be the length direction of the stopper 160, that is, the length direction of the kidney-shaped hole 162 may be parallel to the stacking direction of the battery pack. In some embodiments, the length direction of the kidney-shaped hole 162 may be perpendicular to the stacking direction of the battery pack. The columnar structure may be moved in a direction parallel to the stacking direction of the battery pack or in a direction perpendicular to the stacking direction of the battery pack, thereby effectively adjusting the position of the fitting part 161 and facilitating the connection of the fitting part 161 with the connection part 7.

In one embodiment, as shown in fig. 14, two holes are respectively provided at two ends of the limiting member 160, one is a kidney-shaped hole 162, the other is a circular hole 163, two limiting shafts are respectively provided in the circular hole 163 and the kidney-shaped hole 162, when the two limiting shafts are connected with the two mounting holes, the mounting positions of the limiting shafts and the kidney-shaped hole 162 can be adjusted according to the distance between the two mounting holes, so that the connection between the two limiting shafts on the limiting member 160 and the two mounting holes on the housing 6 can be conveniently realized, and a certain amount of activity can be reserved for the limiting member 160 and the housing 6 due to the movement of the limiting shafts relative to the kidney-shaped hole 162. In some embodiments, after the limiting shaft is moved into place, the limiting shaft may be locked to the limiting member 160 by a bolt or the like.

In one embodiment, the length of the limiting member 160 is adjustable, so that the accuracy requirement of the structure can be reduced, the assembly efficiency of the limiting member 160 and the battery module can be improved, and the application range of the limiting member 160 can be also improved.

It should be noted that, when the limiting member 160 is used in the battery packs of the same specification, that is, the number of batteries included in the battery packs is the same, but in some cases, the problem that the distance between the two end plates of each battery pack is changed is not excluded, and the length of the limiting member 160 is adjustably set, so that it is ensured that the same limiting member 160 can adapt to the battery packs with the length change. Alternatively, where the battery pack includes a different number of batteries, the adjustment may be made by adjusting the length of the stop 160.

In one embodiment, the limiting member 160 may include two plugging segments that are plugged into each other, and the two plugging segments are movably disposed with each other, so that the length of the limiting member 160 is adjusted, and the limiting member can be locked by a fastener after meeting the length requirement. In some embodiments, the stop 160 may include a power source, which may include a telescopic structure, and the power source may be an oil cylinder, an air cylinder, or an electric cylinder, so as to push the telescopic rod to extend and retract, thereby implementing the length adjustment of the stop 160.

In one embodiment, as shown in fig. 12 and 14, a handle 164 may be provided on the stopper 160, the handle 164 facilitating grasping of the stopper 160 by an operator. The number of handles 164 may be at least two.

In one embodiment, two ends of the limiting member 160 may be provided with at least two adapting portions 161, respectively, and two end plates of the housing 6 may be provided with at least two connecting portions 7, respectively, so as to achieve reliable connection between the limiting member 160 and the housing 6.

In one embodiment, the stacking apparatus may include at least two stoppers 160, so that the protection of the battery pack may be reliably achieved by the at least two stoppers 160.

In one embodiment, the battery pack is used for being placed on the base 100, and the housing 6 is connected with the base 100, that is, in the process of tightening the binding belt 8, the limit of the battery pack is not only achieved through the limit piece 160, but also the battery module is reliably prevented from being deformed by being connected with the housing 6 and the base 100.

It should be noted that, the housing 6 is connected to the base 100, a pin may be provided on the base 100, and an end plate of the housing 6 may be connected to the pin. The base 100 may be provided with other structures for supporting the end plate and connecting with the end plate, which is not limited herein, and may be selected according to actual needs.

When the case 6 is banded 8 by the banding machine, the substrate 103 of the second welding hold-down mechanism 150 is required to be disposed so as to be movable in the stacking direction of the battery pack, thereby forming an avoidance space at the side of the battery pack for placing the banding machine.

An embodiment of the present invention also provides an assembly line for a battery pack, including the above stacking apparatus.

The assembly line of the battery pack according to one embodiment of the present invention includes a stacking apparatus. The stacking apparatus includes a base 100, a positioning mechanism, and an alignment mechanism 130, a plurality of cells 1 are stacked on the base 100, and alignment of the respective cells 1 is achieved by the alignment mechanism 130, and then clamping of the aligned respective cells 1 is achieved by the positioning mechanism, thereby achieving stacking of a battery pack.

In one embodiment, the assembly line further comprises: a welding mechanism; wherein the welding mechanism is used for welding the bus bar and the pole of the battery 1; or, a welding mechanism for welding the first busbar 2 and the second busbar 3; or, the welding mechanism is used for welding the signal collection terminal 5 and the first bus bar 2. The welding mechanism can realize the welding of the first bus bar 2 and the second bus bar 3 and the welding of the signal acquisition end 5 and the first bus bar 2 by matching with the stacking device. While the welding of the bus bars and the poles may be performed before the battery 1 is stacked, and the battery 1 may be stacked after the welding of the bus bars and the poles is completed.

In one embodiment, the assembly line further comprises: and the transferring mechanism is used for transferring the battery pack fastened by the ribbon 8 to a preset position for subsequent treatment. The transfer mechanism can be an aerial transfer mechanism such as a crown block and the like. Alternatively, the transfer mechanism may be a conveyor line. The transport mechanism may also be a robot.

An embodiment of the present invention further provides a method for assembling a battery pack, referring to fig. 15, the method for assembling a battery pack includes:

s101, providing a battery 1 with a bus bar;

s103, stacking a plurality of batteries 1, and enabling the first bus bar 2 of one battery 1 and the second bus bar 3 of the other battery 1 to be adjacent to each other;

s105, aligning the respective cells 1;

s107, clamping the aligned plurality of batteries 1.

The method for assembling the battery pack according to the embodiment of the invention stacks each battery 1 with the bus bars, and enables the first bus bar 2 and the second bus bar 3 of two adjacent batteries 1 to be attached, and then aligns the plurality of batteries 1 and completes clamping of the plurality of batteries 1 so as to realize stacking of each battery 1.

It should be noted that, before stacking of the batteries 1 is performed, the bus bars are already welded to the batteries 1, so that when stacking a plurality of batteries 1, it is necessary to have the bus bars of each battery 1 at the side of the battery 1, and in order to secure connection between the bus bars, it is necessary to have the first bus bar 2 and the second bus bar 3 of the adjacent two batteries 1 disposed correspondingly, and the first bus bar 2 and the second bus bar 3 may be stacked. In some embodiments, it is not excluded that the first bus bar 2 and the second bus bar 3 are directly butted. While the alignment of the cells 1 and the clamping of the cells 1 are performed, it is necessary to avoid interference with the bus bars.

In one embodiment, the bus bars of the cells 1 are disposed on the stacking face of the cells 1, the stacking face of the cells 1 being a face perpendicular to the stacking direction of the battery pack.

The first busbar 2 of one cell 1 and the second busbar 3 of the other cell 1 are arranged in a fitting manner, and the first busbar 2 and the second busbar 3 are used for representing the busbars of two different cells 1.

In one embodiment, the method of assembling a battery pack further comprises: pressing the first busbar 2 to the second busbar 3; the first bus bar 2 and the second bus bar 3 are welded to achieve connection of the first bus bar 2 and the second bus bar 3.

It should be noted that the first welding pressing mechanism 140 disposed in a stacked manner may be used to press the first busbar 2 to the second busbar 3.

In one embodiment, the method of assembling a battery pack further comprises: pressing the signal acquisition end 5 of the circuit board 4 to the first busbar 2; the signal acquisition end 5 and the first busbar 2 are welded to realize the connection of the signal acquisition end 5 and the first busbar 2.

It should be noted that the second soldering pressing mechanism 150 disposed in a stacked manner may be used to press the signal collecting end 5 of the circuit board 4 to the first bus bar 2.

In one embodiment, the method of assembling a battery pack further comprises: the individual cells 1 are bound by the binding tape 8, whereby the fixation of the plurality of cells 1 is achieved.

In one embodiment, the tie 8 may directly tie up a plurality of batteries 1, i.e. the tie 8 may be fixed to the housing of the batteries 1, e.g. the housing of the two outermost batteries 1 has a relatively high strength and may thus withstand the strapping force of the tie 8.

In one embodiment, the two ends of the stopper 160 are respectively connected to the outer cases of the two outermost batteries 1 before the respective batteries 1 are directly bundled by the bundling strap 8, thereby preventing the battery pack from being deformed during the bundling strap. I.e., the stopper 160 is directly coupled to the housing of the battery.

In one embodiment, the strap 8 may indirectly bundle a plurality of cells 1, bundling individual cells 1 with the strap 8, comprising: the housing 6 is tied up with the tie 8 to fix the respective batteries 1 in the housing 6, thereby preventing the batteries 1 from coming off.

Before tightening the housing 6 with the band 8, the second welding hold-down mechanism 150 may be moved to form a space for avoiding the side of the battery pack for placing the band machine.

In one embodiment, the method of assembling a battery pack further comprises: before the casing 6 is bound by the binding belt 8, two ends of the limiting member 160 are respectively connected to two opposite connecting portions 7 of the casing 6, so that deformation of the battery pack during the binding belt is avoided.

It should be noted that the limiting member 160 may be a stacked limiting member 160, where the limiting member 160 is used to connect two end plates of the housing 6. The housing 6 may also comprise two side covers, which are arranged opposite to each other, so that a reliable enclosure of the plurality of cells 1 is achieved with the two end plates, and the tie 8 is wound around the two end plates and the two side covers, thereby fastening the plurality of cells 1.

In one embodiment, aligning each cell 1 includes: the alignment mechanism 130 is attached to the side surface of each battery 1, and the alignment mechanism 130 is made to avoid the bus bars located on the side surface of the battery 1, that is, the alignment mechanism 130 is arranged opposite to the bus bars of the battery 1.

It should be noted that the alignment of the plurality of batteries 1 may be achieved by moving the alignment mechanism 130, or the batteries 1 may be pushed so that the plurality of batteries 1 are in contact with the alignment mechanism 130. The alignment mechanism 130, the first welding press mechanism 140, and the second welding press mechanism 150 may be located at the same side of the battery 1. The alignment mechanism 130 may be an alignment mechanism 130 of a stacking apparatus.

In one embodiment, stacking a plurality of cells 1 includes: a plurality of batteries 1 are sequentially stacked on the base 100, and the stacking direction of the battery pack is parallel to the base 100. The plurality of batteries 1 are stacked on the base 100, and in a specific stacking process, a mechanical arm can be used to grasp the batteries 1, so that each battery 1 is stacked on the base 100 in sequence. The stack of the respective cells 1 on the base 100 may be a horizontal stack. A horizontal stack may be understood as a stack direction of the battery pack is parallel to the base 100, and at this time, the base 100 may be parallel to a horizontal reference plane, or the base 100 may be disposed obliquely to the horizontal reference plane.

It should be noted that the plurality of batteries 1 may be compressed by the first positioning mechanism 110 and the second positioning mechanism 120 of the stacking apparatus.

In one embodiment, each battery 1 is placed on a positioning slider 101 of the base 100, respectively; when the first positioning mechanism 110 and the second positioning mechanism 120 are adopted to compress the plurality of batteries 1, the batteries 1 drive the positioning sliding blocks 101 to move relative to the base 100 along the stacking direction of the battery pack, so that the reliable lamination of each battery 1 is ensured.

It should be noted that the positioning slider 101 may be the positioning slider 101 of the stacking apparatus.

In one embodiment, stacking a plurality of cells 1 includes: a plurality of batteries 1 are sequentially stacked on the base 100 in a stacking direction perpendicular to the base 100. The stack of the respective cells 1 on the base 100 may be a vertical stack, which is understood to be a stack direction of the battery pack perpendicular to the base 100. After stacking of the battery packs is completed, the positioning structure can be used for compressing the battery packs.

In one embodiment, the method of assembling the battery pack may be applied to the above-described stacked arrangement.

An embodiment of the present invention also provides a battery pack including the battery pack assembled by the above-described method of assembling a battery pack.

The battery pack according to one embodiment of the invention is assembled by the assembly method of the battery pack, and the assembly production line of the battery pack comprises stacking equipment. The assembling method of the battery pack stacks the respective batteries 1 having the bus bars, and causes the first bus bars 2 and the second bus bars 3 of the adjacent two batteries 1 to be disposed correspondingly, and subsequently aligns the plurality of batteries 1 and completes the clamping of the plurality of batteries 1 to realize the stacking of the respective batteries 1.

In one embodiment, the battery pack includes a plurality of cells 1, which may include cells and an electrolyte, and a minimum unit capable of performing an electrochemical reaction such as charge/discharge. The battery cell refers to a unit formed by winding or laminating a stack portion including a first electrode, a separator, and a second electrode. When the first electrode is a positive electrode, the second electrode is a negative electrode. The polarities of the first electrode and the second electrode may be interchanged.

The battery cell is a laminated battery cell, and the battery cell is provided with a first pole piece, a second pole piece and a diaphragm, wherein the first pole piece, the second pole piece and the diaphragm are mutually laminated, the second pole piece is opposite to the first pole piece, and the diaphragm is arranged between the first pole piece and the second pole piece, so that a plurality of pairs of first pole pieces and the second pole pieces are stacked to form the laminated battery cell.

The battery can be a winding type battery, namely, a first pole piece, a second pole piece opposite to the first pole piece and a diaphragm sheet arranged between the first pole piece and the second pole piece are wound to obtain a winding type battery cell.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. The specification and example embodiments are to be considered exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (28)

1. A stacking apparatus for stacking a plurality of cells (1) to form a battery pack, the stacking apparatus comprising:

-a base (100), said base (100) being adapted to house said battery (1);

the positioning mechanism comprises a positioning surface which is used for being attached to the stacking surface of the battery (1);

an alignment mechanism (130), wherein the alignment mechanism (130) is arranged on the base (100) and is used for being attached to the side surface of each battery (1) so as to align each battery (1);

wherein the positioning mechanism is used for clamping the aligned battery (1).

2. The stacking apparatus of claim 1 wherein the positioning mechanism comprises:

a first positioning mechanism (110), wherein the first positioning mechanism (110) is arranged on the base (100), and the first positioning mechanism (110) comprises a first positioning surface (111);

the second positioning mechanism (120), the second positioning mechanism (120) is arranged on the base (100), the second positioning mechanism (120) comprises a second positioning surface (121), and the first positioning surface (111) and the second positioning surface (121) are oppositely arranged;

wherein the first positioning mechanism (110) and the second positioning mechanism (120) are relatively movably arranged to clamp the plurality of batteries (1) between the first positioning surface (111) and the second positioning surface (121).

3. Stacking device according to claim 2, wherein the base (100) is provided with a positioning slide (101) for placing the battery (1), the positioning slide (101) being movably arranged with respect to the base (100).

4. A stacking device according to claim 3, wherein the positioning slider (101) is plural, and each of the cells (1) corresponds to at least one of the positioning sliders (101) in a direction perpendicular to a stacking direction of the battery pack;

the length of the positioning sliding block (101) attached to the battery (1) along the stacking direction of the battery pack is not greater than the thickness of the battery (1).

5. The stacking apparatus of claim 1 wherein the alignment mechanism (130) comprises:

a driving plate (131), the driving plate (131) being provided to the base (100), the driving plate (131) including a reference surface (1311), the reference surface (1311) extending in a stacking direction of the battery pack;

and at least two protrusions (132), wherein each protrusion (132) is arranged on the reference surface (1311) at intervals along the stacking direction of the battery pack and is used for being attached to the side surface of the battery (1).

6. The stacking apparatus according to claim 5, wherein the protrusions (132) are arranged to correspond one-to-one to the cells (1);

Wherein, along the stacking direction of the battery pack, the length of the protrusion (132) attached to the side surface of the battery (1) is not greater than the thickness of the battery (1).

7. The stacking apparatus according to claim 6, wherein the protrusion (132) is movably provided with respect to the driving plate (131) in a stacking direction of the battery pack.

8. The stacking apparatus of claim 5 wherein the alignment mechanism (130) further comprises:

and the base plate is detachably arranged on the base (100), and the driving plate (131) is arranged on the base plate.

9. The stacking device according to claim 1, further comprising a soldering press mechanism provided to the base (100) for pressing the first busbar (2) to the second busbar (3) and/or for pressing the signal-collecting end (5) of the circuit board (4) to the first busbar (2).

10. The stacking apparatus of claim 9 wherein the weld hold-down mechanism comprises:

a base plate detachably mounted to the base (100);

the connecting piece is arranged on the substrate;

The pressing block is arranged on the connecting piece and is provided with an avoidance space for welding.

11. The stacking apparatus according to claim 10, wherein the substrate is movably disposed in a stacking direction of the battery pack, and/or the substrate is movably disposed in a direction approaching or separating from the battery pack.

12. Stacking device according to claim 11, wherein the base (100) is provided with a bottom plate (102), the base plate being detachably mounted to the bottom plate (102);

wherein the bottom plate (102) is movably disposed with respect to the base (100) in the stacking direction of the battery pack, and/or the bottom plate (102) is movably disposed with respect to the base (100) in a direction approaching or separating from the battery pack.

13. The stacking apparatus of claim 10 wherein said connector and said press block are plural, plural said connectors are provided to said base plate, and each of said connectors is provided with said press block.

14. The stacking apparatus of any one of claims 9 to 13 wherein the welding press mechanism comprises:

-a first welding press mechanism (140), the first welding press mechanism (140) being adapted to press the first busbar (2) to the second busbar (3);

A second welding hold-down mechanism (150), the second welding hold-down mechanism (150) being configured to press the signal acquisition end (5) to the first busbar (2);

wherein the first welding press mechanism (140) and the second welding press mechanism (150) are selectively mounted to the base (100).

15. The stacking device of claim 1, wherein the stacking device further comprises:

and a limiting piece (160), wherein the limiting piece (160) spans across a plurality of the batteries (1) of the battery pack, and the limiting piece (160) is used for connecting two opposite connecting parts (7) of a shell (6) of the battery pack.

16. An assembly line for a battery pack, characterized by comprising the stacking apparatus of any one of claims 1 to 15.

17. The assembly line for a battery pack according to claim 16, further comprising:

a welding mechanism;

the welding mechanism is used for welding the bus bar and the pole of the battery (1); or, the welding mechanism is used for welding the first bus bar (2) and the second bus bar (3); or, the welding mechanism is used for welding the signal acquisition end (5) and the first busbar (2).

18. A method of assembling a battery pack, comprising:

Providing a battery (1) with a busbar;

stacking a plurality of batteries (1) and enabling the first bus bar (2) of one adjacent battery (1) to be attached to the second bus bar (3) of the other battery (1);

-aligning each of said cells (1);

clamping the aligned plurality of cells (1).

19. The method of assembling a battery pack according to claim 18, further comprising:

-pressing the first busbar (2) to the second busbar (3);

-welding the first busbar (2) and the second busbar (3).

20. The method of assembling a battery pack according to claim 19, further comprising:

pressing a signal acquisition end (5) of a circuit board (4) to the first busbar (2);

and welding the signal acquisition end (5) and the first busbar (2).

21. The method of assembling a battery pack according to claim 20, further comprising:

each of the cells (1) is bound by a binding band (8).

22. Method of assembling a battery pack according to claim 21, wherein bundling each of the cells (1) with a tie (8) comprises:

the housing (6) is strapped by means of the strapping (8) in order to fix the individual cells (1) in the housing (6).

23. The method of assembling a battery pack according to claim 22, further comprising:

before the housing (6) is strapped by the strapping tape (8),

two ends of the limiting piece (160) are respectively connected with two opposite connecting parts (7) of the shell (6).

24. Method of assembling a battery pack according to claim 18, wherein aligning each of the cells (1) comprises:

and attaching the alignment mechanism (130) to the side surface of each battery (1) and enabling the alignment mechanism (130) to avoid the bus bars positioned on the side surface of each battery (1).

25. The method of assembling a battery pack according to any one of claims 18 to 24, wherein stacking a plurality of the cells (1) includes:

and stacking a plurality of batteries (1) on the base (100) in sequence, wherein the stacking direction of the battery pack is parallel to the base (100).

26. Method of assembling a battery pack according to claim 25, wherein each of the batteries (1) is placed on a positioning slide (101) of the base (100), respectively;

when a plurality of batteries (1) are pressed by adopting the first positioning mechanism (110) and the second positioning mechanism (120), the batteries (1) drive the positioning sliding blocks (101) to move relative to the base (100) along the stacking direction of the battery pack.

27. The method of assembling a battery pack according to any one of claims 18 to 24, wherein stacking a plurality of the cells (1) includes:

and stacking a plurality of batteries (1) on the base (100) in sequence, wherein the stacking direction of the battery pack is perpendicular to the base (100).

28. A battery pack comprising a battery pack assembled by the method of assembling a battery pack according to any one of claims 18 to 27.

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