CN220042186U - Battery device - Google Patents

Abstract

The disclosure relates to the technical field of batteries and discloses a battery device; the battery device comprises a battery pack, a conductive bar and an elastic clamping part; the battery pack comprises at least two single batteries which are sequentially arranged along a first direction, wherein each single battery comprises a battery pole; the conductive bar is electrically connected with the battery poles of at least two single batteries; one end of the elastic clamping part is fixed on the single battery, the elastic clamping part protrudes out of the single battery along the second direction, the elastic clamping part is clamped with the conductive bar, the elastic deformation of the elastic clamping part is greater than or equal to 5mm in the second direction, and the second direction is the direction that the single battery points to the conductive bar. The battery device is characterized in that the conductive bar is pre-fixed through the elastic clamping part, the elastic clamping part can generate certain elastic deformation in the process of clamping the conductive bar and the elastic clamping part, the conductive bar cannot be pre-fixed due to the breakage of the elastic clamping part is avoided, the subsequent welding of the conductive bar and the battery pole is facilitated, and the fixation stability of the conductive bar and the battery pole is guaranteed.

Description

Battery device

Technical Field

The disclosure relates to the technical field of batteries, and in particular relates to a battery device.

Background

At present, a battery pole of a single battery needs to be connected with a conductive bar, at least two single batteries are connected in series or in parallel through the conductive bar, and current is transmitted through the conductive bar; before battery post and conducting bar fixed connection, pass through the pothook joint with the conducting bar fixed to follow-up fixed connection who carries out battery post and conducting bar, however, the pothook breaks easily, leads to the conducting bar unable pre-fixation, leads to the fixed connection effect between conducting bar and the battery post not good.

It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

An object of the present disclosure is to overcome the disadvantages of the related art described above, and to provide a battery device.

According to one aspect of the present disclosure, there is provided a battery device including:

the battery pack comprises at least two single batteries which are sequentially arranged along a first direction, wherein each single battery comprises a battery pole;

the conductive bars are electrically connected with battery poles of at least two single batteries;

and one end of the elastic clamping part is fixed on the single battery, the elastic clamping part protrudes out of the single battery along the second direction, the elastic clamping part is clamped with the conductive bar, the elastic deformation of the elastic clamping part is greater than or equal to 5mm in the second direction, and the second direction is the direction in which the single battery points to the conductive bar.

According to the battery device, on one hand, the elastic clamping part is clamped with the conductive bar, and the conductive bar is pre-fixed through the elastic clamping part, so that the subsequent welding between the conductive bar and the battery pole is convenient. On the other hand, in the second direction, the elastic deformation of the elastic clamping portion is greater than or equal to 5 millimeters, so that in the process of clamping the conductive bar and the elastic clamping portion, the elastic clamping portion can generate a certain elastic deformation to facilitate the clamping fixation of the conductive bar and the elastic clamping portion, and the conductive bar cannot be pre-fixed due to the breakage of the elastic clamping portion is avoided, so that the stability of the fixed connection between the conductive bar and the battery post is ensured.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort.

Fig. 1 is a schematic structural view of an exemplary embodiment of a battery device of the present disclosure.

Fig. 2 is a schematic perspective view of the four unit cells in fig. 1 mated with the conductive bars.

Fig. 3 is an enlarged partial schematic view of the portion indicated by I in fig. 2.

Fig. 4 is a schematic structural view of the elastic clamping portion in fig. 1.

Fig. 5 is a schematic sectional view of a part of the hook of the elastic clamping portion and the conductive bar.

Fig. 6 is a schematic structural diagram of the conductive strip in fig. 1.

Reference numerals illustrate:

1. a battery box; 11. a support plate; 12. a first side frame; 13. a second side frame;

2. a battery pack; 21. a single battery; 211. a battery post; 212. a first surface; 213. a large side plate; 214. an end plate; 215. a recessed structure;

3. a conductive bar; 31. a recessed portion;

4. an elastic clamping part; 41. a fixing part; 42. a connecting rod; 43. a clamping hook; 431. a first end face;

5. an insulating sheath;

x, a first direction; y, second direction; z, third direction.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus detailed descriptions thereof will be omitted. Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale.

Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of an icon to another component, these terms are used in this specification for convenience only, such as in terms of the orientation of the examples described in the figures. It will be appreciated that if the device of the icon is flipped upside down, the recited "up" component will become the "down" component. When a structure is "on" another structure, it may mean that the structure is integrally formed with the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure through another structure.

The terms "a," "an," "the," "said" and "at least one" are used to indicate the presence of one or more elements/components/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. in addition to the listed elements/components/etc.; the terms "first," "second," and "third," etc. are used merely as labels, and do not limit the number of their objects.

In the present utility model, unless explicitly specified and limited otherwise, the term "connected" is to be construed broadly, and for example, "connected" may be either fixedly connected, detachably connected, or integrally formed; can be directly connected or indirectly connected through an intermediate medium. "and/or" is merely an association relationship describing an association object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

The exemplary embodiments of the present disclosure provide a battery device, which may include a battery pack 2, a conductive bar 3, and an elastic clamping portion 4, as shown with reference to fig. 1 to 6; the battery pack 2 may include at least two unit cells 21 sequentially arranged in the first direction X, the unit cells 21 including a battery post 211; the conductive bars 3 are electrically connected with the battery poles 211 of at least two unit batteries 21; one end of the elastic clamping part 4 is fixed on the single battery 21, the elastic clamping part 4 protrudes out of the single battery 21 in a second direction Y, the elastic clamping part 4 is clamped with the conductive bar 3, the elastic deformation of the elastic clamping part 4 in the second direction Y is more than or equal to 5mm, and the second direction Y is the direction that the single battery 21 points to the conductive bar 3

In one aspect, the conductive bar 3 is pre-fixed by the elastic clamping part 4, so as to facilitate the subsequent welding between the conductive bar 3 and the battery post 211. On the other hand, in the process of clamping the conductive bar 3 and the elastic clamping part 4, the elastic clamping part 4 can generate a certain elastic deformation amount so as to facilitate the clamping and fixing of the conductive bar 3 and the elastic clamping part 4, and avoid the situation that the conductive bar 3 cannot be pre-fixed due to the breakage of the elastic clamping part 4 so as to ensure the stability of the fixed connection between the conductive bar 3 and the battery post 211.

As shown in fig. 1, the battery device may be provided in a rectangular parallelepiped structure, and therefore, the battery case 1 may be provided in a rectangular parallelepiped structure. Specifically, the battery case 1 may include a support plate 11, a protective cover (not shown), two first side frames 12, and two second side frames 13, and the support plate 11 and the protective cover may be provided in a rectangular shape. Two first side frames 12 and two second side frames 13 are arranged around the supporting plate 11, the two first side frames 12 and the two second side frames 13 are connected end to form a rectangular frame, the first side frames 12 extend along the first direction X, the second side frames 13 extend along the second direction Y, protective covers are arranged on the other sides, opposite to the supporting plate 11, of the two first side frames 12 and the two second side frames 13, so that the protective covers are arranged opposite to the supporting plate 11, and the two first side frames 12 and the two second side frames 13 are connected between the protective covers and the supporting plate 11. The support plate 11, the protective cover, the two first side frames 12 and the two second side frames 13 surround a receiving chamber formed in the battery case 1.

Of course, in other example embodiments of the present disclosure, the support plate 11 and the protective cover may be provided in a circular shape, an oval shape, a trapezoid shape, etc., and the side frames may be provided in one or more shapes and surround to form a circular shape, an oval shape, a trapezoid shape, etc., such that the battery case 1 is formed in a cylindrical shape, an oval cylindrical shape, a prismatic shape, etc. Other shapes of the battery case 1 may be used, and will not be described here. Further, the battery box 1 may not include a protective cover, and for example, in the case where a plurality of battery devices are stacked one above another, the battery device located below may not be provided with a protective cover, and only the battery device located uppermost may be provided with a protective cover, and the support plate 11 of the upper battery device may serve as a protective cover of the lower battery device.

A battery pack 2 is arranged in the battery box 1, the battery pack 2 is arranged on the supporting plate 11, specifically, the battery pack 2 is arranged on the large surface of the supporting plate 11, namely, one surface of the supporting plate 11 on which the battery pack 2 is arranged is the large surface of the supporting plate 11; the battery pack 2 may include at least two unit cells 21, and the at least two unit cells 21 are sequentially arranged in the first direction X.

In the present exemplary embodiment, the unit cells 21 may include a battery case, and a battery cell or the like provided in the battery case.

The unit cells 21 may be provided in the shape of a rectangular parallelepiped, and correspondingly, the battery case may be provided in the shape of a rectangular parallelepiped, as shown with reference to fig. 2 and 3, and may include two end plates 214 and four side plates; the four side plates are arranged in pairs; the four side plates are sequentially connected end to form a cuboid cylinder. One end plate 214 is connected to one side of the four side plates and another end plate 214 is connected to the opposite side of the four side plates. Two end plates 214 and four side plates surround to form a receiving space.

It should be noted that, the four side plates may include a pair of large side plates 213 and a pair of small side plates, the area of the large side plate 213 is larger than that of the small side plate, and the area of the large side plate 213 is larger than that of the end plate 214, so that the area of the side of the two large side plates 213 facing away from the battery cell is the largest, and the side of the two large side plates 213 facing away from the battery cell is the large side of the battery case.

The battery case may be made of aluminum, steel or other metals and alloys, but may be made of other materials, which are not described here.

In the present exemplary embodiment, a battery cell (not shown in the drawings) is disposed in the receiving chamber of the battery case, the battery cell is disposed in a rectangular parallelepiped shape adapted to the battery case, the battery cell may include a plurality of positive electrode tabs and negative electrode tabs stacked and a separator disposed between the positive electrode tabs and the negative electrode tabs, and a stacking direction of the plurality of positive electrode tabs and the plurality of negative electrode tabs is perpendicular to the large side plate 213, i.e., most of the positive electrode tabs, the negative electrode tabs, and the separator are disposed substantially parallel to the large side plate 213.

In the present exemplary embodiment, the unit cell 21 may further include a battery post 211, the battery post 211 may be provided at one large side plate 213, and the battery post 211 protrudes from the large side plate 213. The battery post 211 is provided in a rectangular parallelepiped structure, and the battery post 211 includes a first surface 212, specifically, a surface of the battery post 211 adjacent to the end plate 214 and parallel to the end plate 214 is the first surface 212, and the first surface 212 is provided perpendicular to the large surface of the support plate 11. And the area of the first surface 212 of the battery post 211 is maximized.

Further, the number of the battery poles 211 may be two, and the two battery poles 211 may be provided at opposite ends of the single battery 21. That is, one battery post 211 is provided at each end of the unit battery 21 in the second direction Y.

Further, a recess structure is provided on the other large side plate 213, and the recess structure 215 is disposed opposite to the battery post 211, as shown in fig. 2 and 3, so that the recess structure 215 can accommodate the battery post 211 of the adjacent single battery 21, and the large side plates 213 of the adjacent two single batteries 21 can be attached to each other, thereby improving the space utilization of the internal space of the battery box 1 and facilitating the fixing of the single battery 21.

Of course, in other example embodiments of the present disclosure, the recessed structure 215 may be provided on the same large side plate 213 as the battery post 211, in which case the battery post 211 is provided within the recessed structure 215, i.e., the recessed structure 215 is for receiving the battery post 211 of the battery cell 21 itself. The large side plates 213 of two adjacent single batteries 21 can be mutually attached, so that the space utilization rate of the internal space of the battery box 1 is improved, and the single batteries 21 are conveniently fixed.

Additionally, in other example embodiments of the present disclosure, the battery posts 211 may be disposed on the end plates 214, e.g., two battery posts 211 are disposed on two end plates 214 in a one-to-one correspondence. The battery post 211 is provided in a rectangular parallelepiped structure, and the area of a face of the battery post 211 facing away from the end plate 214 and parallel to the end plate 214 is maximized.

In the present exemplary embodiment, the large side plates 213 of the adjacent two unit cells 21 are abutted against each other, and at least two unit cells 21 are sequentially arranged in the first direction X to form a group of battery packs 2 such that the large side plates 213 of the unit cells 21 are disposed perpendicularly to the arrangement direction of the unit cells 21. A pair of large side plates 213 and two end plates 214 of the unit cells 21 are disposed perpendicular to the support plate 11 of the battery case 1. A pair of small side plates of the unit cell 21 are disposed in parallel with the support plate 11 of the battery case 1.

The battery device further comprises a conductive bar 3, the conductive bar 3 is electrically connected with the battery poles 211 of the at least two single batteries 21, the at least two single batteries 21 are connected in series or in parallel through the conductive bar 3, and current is transmitted through the conductive bar 3. In the case where the battery post 211 is disposed on the large side plate 213, the area of the first surface 212 of the battery post 211 is maximized, and in order to secure the overcurrent area, the conductive bar 3 needs to be connected to the first surface 212 of the battery post 211, and therefore, the conductive bar 3 needs to be fixed to the first surface 212, and the first surface 212 is disposed perpendicular to the support plate 11 of the battery case 1, so that the conductive bar 3 is also disposed substantially perpendicular to the support plate 11 of the battery case 1.

In the case where the battery post 211 is disposed on the end plate 214, the side of the battery post 211 facing away from the end plate 214 is the first surface 212 of the battery post 211, and the area of the first surface 212 is the largest, and in order to ensure the overcurrent area, the conductive strip 3 needs to be connected to the first surface 212 of the battery post 211, and therefore, the conductive strip 3 needs to be fixed on the side of the first surface 212 facing away from the unit battery 21, and the first surface 212 is disposed vertically to the support plate 11 of the battery box 1, so that the conductive strip 3 is also disposed substantially vertically to the support plate 11 of the battery box 1.

Therefore, before the conductive bar 3 is fixedly connected to the battery post 211, the conductive bar 3 needs to be pre-fixed to facilitate welding between the conductive bar 3 and the battery post 211.

In the present exemplary embodiment, the elastic clamping portion 4 is provided, and one end of the elastic clamping portion 4 is fixed to the unit cell 21, specifically, one end of the elastic clamping portion 4 is fixed to the end plate 214 of the unit cell 21. And the elastic clamping portion 4 protrudes from the single battery 21 along the second direction Y. The elastic clamping part 4 is clamped with the conductive bar 3, and the conductive bar 3 is pre-fixed through the elastic clamping part 4, so that the subsequent welding between the conductive bar 3 and the battery pole 211 is convenient.

In the second direction Y, the elastic deformation amount of the elastic engagement portion 4 is 5mm or more. In the process of clamping the conductive bar 3 and the elastic clamping part 4, the elastic clamping part 4 needs to have a certain elastic deformation amount to fix the conductive bar 3 and the elastic clamping part 4 in a clamping way, and the conductive bar 3 which cannot be pre-fixed due to the breakage of the elastic clamping part 4 is avoided, so that the stability of the fixed connection between the conductive bar 3 and the battery pole 211 is ensured.

Further, in the second direction Y, the elastic deformation amount of the elastic clamping portion 4 is 30 mm or less, for example, the elastic deformation amount of the elastic clamping portion 4 may be 8 mm, 10 mm, 12 mm, 15 mm, 17 mm, 20mm, 23 mm, 25mm, 27 mm, or the like.

If the elastic deformation of the elastic clamping portion 4 is too large, the pre-fixing effect of the elastic clamping portion 4 on the conductive bar 3 is poor, and in the welding process of the conductive bar 3 and the battery post 211, the conductive bar 3 may also generate larger movement, so that welding dislocation or unstable welding fixation between the conductive bar 3 and the battery post 211 is caused.

If the elastic deformation of the elastic clamping portion 4 is too small, the elastic clamping portion 4 is easy to break in the process of clamping the conductive bar 3 and the elastic clamping portion 4, so that the conductive bar 3 cannot be pre-fixed, and welding dislocation or unstable welding fixation between the conductive bar 3 and the battery post 211 is caused.

The above numerical range not only ensures that the pre-fixing effect of the elastic clamping part 4 on the conductive bar 3 is better, but also prevents the conductive bar 3 from moving greatly in the process of welding the conductive bar 3 and the battery post 211; in the process of clamping the conductive bar 3 and the elastic clamping part 4, the elastic clamping part 4 is not easy to break; thereby ensuring the welding effect between the conductive bars 3 and the battery post 211.

When the object is subjected to an external force, deformation is generated, and if the external force is removed, the object can completely recover its original shape and size, and the deformation is called elastic deformation.

Specifically, referring to fig. 3 and 4, the elastic clamping portion 4 may include a fixing portion 41, a connecting rod 42, and a hook 43; the fixing portions 41 may be provided in two, and one ends of both the fixing portions 41 are fixed to the unit cells 21, specifically, one ends of both the fixing portions 41 are fixed to the end plates 214 of the unit cells 21; and both fixing portions 41 protrude from the unit cells 21. The elastic clamping portion 4 is fixed by the two fixing portions 41, so that the fixing area between the elastic clamping portion 4 and the single battery 21 is increased, and the fixing strength between the elastic clamping portion 4 and the single battery 21 is increased.

The connection rod 42 is connected to opposite ends of the two fixing portions 41, and a gap is provided between the connection rod 42 and the unit cells 21, i.e., between the connection rod 42 and the unit cells 21, so that the connection rod 42 can be deformed. The connecting rod 42 may be provided as a cylindrical rod, a prismatic rod, or the like.

The clamping hook 43 is connected to the connecting rod 42, and the connecting rod 42 can deform, so that the connecting rod 42 can drive the clamping hook 43 to deform together, and the clamping hook 43 and the conductive bar 3 are conveniently clamped. The clamping hooks 43 and the single batteries 21 are arranged at intervals, so that the conductive bars 3 can be located between the clamping hooks 43 and the single batteries 21, and the conductive bars 3 are clamped and pre-fixed through the clamping hooks 43.

Further, the area of the cross section of at least one of the fixing portions 41 may decrease with increasing distance from the battery cell 21, the area of the cross section of one of the fixing portions 41 may decrease with increasing distance from the battery cell 21, or the area of the cross section of both of the fixing portions 41 may decrease with increasing distance from the battery cell 21. Specifically, for example, the fixing portion 41 may be provided as a triangular plate, the bottom side of which is fixed to the unit cell 21, and the connecting rod 42 may be fixed to the corner portion opposite to the bottom side. The triangular plate may be a right angle triangular plate, an isosceles triangular plate, or other triangular plate, etc. Of course, the fixing portion 41 may be provided as a trapezoidal plate, the lower bottom edge of which is fixed to the unit cell 21, and the connecting rod 42 may be fixed to the upper bottom edge side of the trapezoidal plate. The fixing portion 41 may be a semicircular plate, a semi-elliptical plate, or the like, which is not described herein.

The cross section of the fixing portion 41 is parallel to the surface of the unit cell 21 on which the fixing portion 41 is provided, and the cross section of the fixing portion 41 may be perpendicular to the second direction Y.

So set up for fixed part 41 is great with the fixed area of battery cell 21, thereby has increased the fixed strength between fixed part 41 and the battery cell 21, and then has increased the fixed strength between elasticity joint portion 4 and the battery cell 21, and elasticity joint portion 4 is difficult to fracture, behind the joint of electric lead 3 and elasticity joint portion 4, guarantees the fixed effect of electric lead 3.

Further, the ratio of the length of the connecting rod 42 to the area of the cross section of the connecting rod 42 is 5mm or more ^-1 And less than or equal to 20mm ^-1 For example, the ratio of the length of the connecting rod 42 to the cross-sectional area of the connecting rod 42 may be 5.5mm ^-1 、6mm ^-1 、6.5mm ^-1 、7mm ^-1 、7.5mm ^-1 、8mm ^-1 、8.5mm ^-1 、9mm ^-1 、9.5mm ^-1 、10mm ^-1 、10.5mm ^-1 、11mm ^-1 、11.5mm ^-1 、12mm ^-1 、12.5mm ^-1 、13mm ^-1 、13.5mm ^-1 、14mm ^-1 、14.5mm ^-1 、15mm ^-1 、15.5mm ^-1 、16mm ^-1 、16.5mm ^-1 、17mm ^-1 、17.5mm ^-1 、18mm ^-1 、18.5mm ^-1 、19mm ^-1 、19.5mm ^-1 Etc.

If the ratio of the length of the connecting rod 42 to the cross-sectional area of the connecting rod 42 is too large, the length of the connecting rod 42 is too long, or the cross-sectional area of the connecting rod 42 is too small, or the length of the connecting rod 42 is long and the cross-sectional area of the connecting rod 42 is small. If the length of the connection rod 42 is too long, the elastic deformation amount that the connection rod 42 can generate is too large or large, so that the connection strength between the connection rod 42 and the fixing portion 41 needs to be large; however, the cross-sectional area of the connecting rod 42 is too small or smaller, which results in too small or smaller connection strength between the connecting rod 42 and the fixing portion 41, which is insufficient, so that the connecting rod 42 and the fixing portion 41 are easily broken, and the pre-fixing of the conductive bar 3 cannot be achieved.

If the ratio of the length of the connecting rod 42 to the cross-sectional area of the connecting rod 42 is too small, the length of the connecting rod 42 is too short, or the cross-sectional area of the connecting rod 42 is too large, or the length of the connecting rod 42 is short and the cross-sectional area of the connecting rod 42 is large. If the length of the connecting rod 42 is too short or shorter, the elastic deformation amount generated by the connecting rod 42 is too small or smaller, and the requirement of the elastic deformation amount when the clamping hook 43 is clamped with the conductive bar 3 cannot be met; moreover, the area of the cross section of the connecting rod 42 is too large or larger, so that the elastic deformation amount which can be generated by the connecting rod 42 is further reduced, and the requirement of the elastic deformation amount when the clamping hook 43 is clamped with the conductive bar 3 cannot be met.

The above numerical range not only ensures that the elastic deformation amount generated by the connecting rod 42 is not excessive, so as to avoid the connection failure between the connecting rod 42 and the fixing part 41 when the connecting rod 42 generates large deformation; the elastic deformation amount that the connecting rod 42 can generate can meet the requirement of the elastic deformation amount when the hook 43 is clamped with the conductive bar 3.

Further, since the elastic engagement portion 4 is provided to the end plate 214 of the unit cell 21, the length of the connecting rod 42 is limited by the width of the end plate 214 in the first direction X, that is, the length of the connecting rod 42 is smaller than the width of the end plate 214 in the first direction X.

In the present exemplary embodiment, the hook 43 is connected to the middle of the connection rod 42. Since the elastic deformation of the middle part of the connecting rod 42 is the largest, the hook 43 is connected to the middle part of the connecting rod 42, so that the elastic deformation of the connecting rod 42 can be completely transferred to the hook 43, the hook 43 is required to be clamped with the conductive bar 3, and the elastic deformation transferred to the hook 43 is the effective elastic deformation.

If the maximum elastic deformation of the connecting rod 42 is 8 mm, the elastic deformation required when the clamping hook 43 is clamped with the conductive bar 3 is 7 mm, and the clamping hook 43 can be clamped with the conductive bar 3 under the condition that the connecting rod 42 does not reach the maximum elastic deformation yet under the condition that the clamping hook 43 is connected to the middle of the connecting rod 42. However, in the case where the hook 43 is not connected to the middle portion of the connecting rod 42, when the connecting rod 42 is already at the maximum elastic deformation, the elastic deformation amount transmitted to the hook 43 may be only 6 mm, or the requirement that the elastic deformation amount required when the hook 43 is clamped with the conductive bar 3 is not satisfied, and the clamping of the hook 43 and the conductive bar 3 cannot be achieved, so that if the connecting rod 42 generates a larger elastic deformation amount, the connection between the connecting rod 42 and the fixing portion 41 is broken, or the connecting rod 42 is broken.

It should be noted that, the middle portion of the connecting rod 42 is not just the middle position of the connecting rod 42, but is a relatively middle position; for example, the connecting rod 42 may be equally divided into three parts along the length direction thereof, and the part located in the middle is the middle of the connecting rod 42, which may be other separation methods, and will not be described herein. So that the center line of the connecting rod 42 perpendicular to the length direction may coincide with the center line of the hook 43, or the center line of the hook 43 may be located at one side of the center line of the connecting rod 42 perpendicular to the length direction.

In the present exemplary embodiment, as shown with reference to fig. 2 and 3, the elastic clamping portions 4 are symmetrically arranged in two, and the two elastic clamping portions 4 are oppositely arranged in the third direction Z, so that the two hooks 43 of the two elastic clamping portions 4 are oppositely arranged, rather than being oppositely arranged, so that the two hooks 43 can be clamped on opposite sides of the third direction Z of the conductive strip 3, and the conductive strip 3 can be pre-fixed in the third direction Z through the two elastic clamping portions 4.

The third direction Z is perpendicular to the second direction Y and perpendicular to the first direction X, and is the height direction of the unit cell 21.

In the third direction Z, referring to fig. 5, the length of the conductive bar 3 is H1, the distance between the two hooks 43 is H2, that is, the distance between the gaps between the two hooks 43 is H2, and the conductive bar 3 is engaged with the two hooks 43 after passing through the gap between the two hooks 43; the ratio of H1 to H2 is 1.005 or more and 1.1 or less, for example, the ratio of H1 to H2 may be 1.01, 1.015, 1.02, 1.025, 1.03, 1.035, 1.04, 1.045, 1.05, 1.055, 1.06, 1.065, 1.07, 1.075, 1.08, 1.085, 1.09, 1.095, and the like.

In the case of a specific capacity determination of the battery device, the length H1 of the conductive bar 3 is already constant, and if the ratio of H1 to H2 is too small, the distance H2 between the two hooks 43 is too large, so that the conductive bar 3 is easily separated from between the two elastic clamping portions 4, and the pre-fixing of the conductive bar 3 cannot be achieved.

If the ratio of H1 to H2 is too large, the distance H2 between the two hooks 43 is too small, so that the conductive strip 3 is difficult to be clamped with the two hooks 43 through the gap between the two hooks 43 under the condition that the elastic clamping portion 4 meets the elastic deformation.

The above numerical range not only ensures that the conductive bar 3 will not break away from between the two elastic clamping portions 4, but also ensures that the conductive bar 3 is easy to be clamped with the two hooks 43 through the gap between the two hooks 43 when the elastic clamping portions 4 meet the above elastic deformation.

Further, referring to fig. 4 and 5, the distance between the end surface of the hook 43 facing away from the connecting rod 42 and the connecting rod 42 decreases with increasing distance from the conductive strip 3, specifically, the end surface of the hook 43 facing away from the connecting rod 42 is a first end surface 431, and the greater the distance between the first end surface 431 and the connecting rod 42 and the closer to the conductive strip 3 is, the smaller the further from the conductive strip 3 is, so as to facilitate the clamping connection between the conductive strip 3 and the two hooks 43.

For example, the end face of the catch 43 facing away from the connecting rod 42 is provided as a bevel, i.e. the first end face 431 may be provided as a bevel. The inclined plane can be used for guiding the conductive bar 3 clamped between the two clamping hooks 43, so that the conductive bar 3 is conveniently clamped with the two clamping hooks 43. Of course, the end surface of the hook 43 facing away from the connecting rod 42 may be configured as an arc surface, or a structure in which the arc surface is connected with an inclined surface.

In the present exemplary embodiment, referring to fig. 6, the conductive strip 3 is provided with a recess 31 that mates with the hook 43, specifically, a surface of the conductive strip 3 facing away from the unit cell 21 is provided with a recess 31 that mates with the hook 43; at least a portion of the hook 43 is located in the recess 31, for example, it may be that the depth of the recess 31 is greater than or equal to the thickness of the hook 43, such that the hook 43 is located entirely in the recess 31; it is also possible that the depth of the recess 31 is smaller than the thickness of the catch 43, so that a portion of the catch 43 is located within the recess 31. By the arrangement, the conductive bars 3 can be clamped and fixed under the condition that the protruding height of the elastic clamping part 4 protruding the single battery 21 is smaller, so that the space utilization rate of the battery box 1 is improved.

Specifically, in the second direction Y, the protruding height of the elastic clamping portion 4 from the single cell 21 is 5mm or more and 25mm or less, for example, the protruding height of the elastic clamping portion 4 from the single cell 21 may be 8 mm, 10 mm, 12 mm, 15 mm, 17 mm, 20mm, 23 mm, or the like.

If the protruding height of the elastic clamping portion 4 protruding from the single battery 21 is too large, the elastic clamping portion 4 occupies more space in the battery box 1, which is not beneficial to improving the space utilization rate of the battery box 1. If the protruding height of the elastic clamping portion 4 protruding from the single battery 21 is too small, the elastic deformation of the elastic clamping portion 4 cannot meet the above requirement, and the space between the elastic clamping portion 4 and the single battery 21 is small, so that it is difficult to accommodate the conductive strip 3.

The above numerical range does not affect the space utilization of the battery box 1, and the elastic deformation of the elastic clamping portion 4 can meet the above requirements, so that the space between the elastic clamping portion 4 and the single battery 21 is sufficient to accommodate the conductive bar 3.

In this exemplary embodiment, the elastic clamping portion 4 is disposed in an insulating manner with the conductive bar 3, that is, the elastic clamping portion 4 and the conductive bar 3 cannot conduct electricity, specifically, the elastic clamping portion 4 may be disposed as an insulating elastic clamping portion 4, that is, the material of the elastic clamping portion 4 is an insulating material, and of course, a layer of insulating layer may be disposed between the elastic clamping portion 4 and the conductive bar 3, and the elastic clamping portion 4 and the conductive bar 3 may be insulated and isolated by the insulating layer.

The elastic locking portion 4 may be directly fixed to the unit cell 21 or indirectly fixed to the unit cell 21 at one end thereof.

Referring to fig. 3 and 4, the unit cell 21 may include an insulating sheath 5, and the insulating sheath 5 may be sleeved at both ends of the battery case in the second direction Y, and the elastic clamping portion 4 is connected to the insulating sheath 5, such that the elastic clamping portion 4 is indirectly fixed to the unit cell 21. Of course, in other example embodiments of the present disclosure, one end of the elastic clamping portion 4 may be directly fixedly connected with the end plate 214 of the unit cell 21, so that one end of the elastic clamping portion 4 is directly fixed to the unit cell 21.

The "parallel" and "perpendicular" mentioned in the present utility model may be not only completely parallel and perpendicular, but also may have a certain error; for example, the included angle between the two is greater than or equal to 0 ° and less than or equal to 5 °, i.e. the two are considered to be parallel to each other; the included angle between the two is more than or equal to 85 degrees and less than or equal to 95 degrees, namely the two are considered to be mutually perpendicular.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure 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. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims (14)

1. A battery device, characterized by comprising:

the battery pack comprises at least two single batteries which are sequentially arranged along a first direction, wherein each single battery comprises a battery pole;

the conductive bars are electrically connected with the battery poles of at least two single batteries;

the elastic clamping part is fixedly arranged at one end of the single battery, protrudes out of the single battery along a second direction, is clamped with the conductive row, and has an elastic deformation of 5mm or more in the second direction, and the second direction is the direction in which the single battery points to the conductive row.

2. The battery device according to claim 1, characterized in that the battery device further comprises:

the battery pack is arranged on the supporting plate, the battery pole comprises a first surface, the first surface is perpendicular to the large surface of the supporting plate, and the conducting bars are welded and connected with the first surface.

3. The battery device according to claim 2, wherein the number of the battery poles is two, and the two battery poles are respectively provided at opposite ends of the single battery.

4. The battery device according to claim 1, wherein an elastic deformation amount of the elastic engagement portion in the second direction is 30 mm or less.

5. The battery device according to claim 1, wherein the elastic clamping portion includes:

two fixing parts, wherein one ends of the two fixing parts are fixed on the single battery, and the two fixing parts protrude out of the single battery along the second direction;

the connecting rods are connected to the opposite ends of the two fixing parts and are arranged at intervals with the single batteries;

and the clamping hook is connected with the connecting rod, and the conductive bar is clamped between the clamping hook and the single battery.

6. The battery device according to claim 5, wherein an area of a cross section of at least one of the fixing portions decreases with an increase in distance from the unit cell, the cross section of the fixing portion being parallel to a face of the unit cell where the fixing portion is provided.

7. The battery device according to claim 5, wherein a ratio of a length of the connecting rod to an area of a cross section of the connecting rod is 5mm or more ^-1 And less than or equal to 20mm ^-1 The cross section of the connecting rod is perpendicular to the length of the connecting rod.

8. The battery device of claim 5, wherein the catch is connected to a middle portion of the connecting rod.

9. The battery device according to claim 5, wherein two elastic clamping portions are provided, the two elastic clamping portions are disposed opposite to each other in a third direction, the two hooks are clamped to opposite sides of the conductive bar, the length of the conductive bar is H1 in the third direction, the distance between the two hooks is H2, the ratio of H1 to H2 is greater than or equal to 1.005 and less than or equal to 1.1, and the third direction is perpendicular to the first direction and perpendicular to the second direction.

10. The battery device of claim 5, wherein a distance of the catch from the end face of the connecting rod to the connecting rod decreases with increasing distance from the conductive strip.

11. The battery device of claim 10, wherein the catch is provided as a ramp facing away from the connecting rod end face.

12. The battery device according to any one of claims 5 to 11, wherein a recess portion is provided on the conductive bar to be engaged with the hook, and at least part of the hook is located in the recess portion.

13. The battery device according to any one of claims 1 to 11, wherein in the second direction, the protruding height of the elastic engagement portion from the single battery is 5mm or more and 25mm or less.

14. The battery device according to any one of claims 1 to 11, wherein the elastic clamping portion is provided insulated from the conductive bar.