CN213636214U - Battery module connecting structure - Google Patents

Abstract

The utility model discloses a battery module connecting structure, which comprises at least two battery modules which are electrically connected in sequence; each battery module comprises a plurality of single battery cells and bus plates arranged at two ends of each single battery cell, and a plurality of elastic conductive parts are arranged at the edges of the bus plates; the conductive part comprises a first conductive segment connected with the bus board and a second conductive segment extending obliquely from one end of the first conductive segment, which is far away from the bus board; and two adjacent battery modules are extruded and attached to form electric connection through corresponding second conductive segments on the two opposite bus plates. Thereby replace screwed connection, avoid the potential safety hazard that the screw dropped, and easy operation, convenient mechanized operation. The bending part is arranged on the middle edge of the confluence copper plate, the current is reduced, the current moves upwards from bottom to top when the current converges, the bending parts are arranged in a plurality of numbers, the current flows out from each bending part, and the current uniformity is improved while the confluence balance is improved.

Description

Battery module connecting structure

[ technical field ] A method for producing a semiconductor device

The utility model relates to a battery technology field, specificly relate to a battery module connection structure.

[ background of the invention ]

The power battery is an important component in an automobile power system, and the structural composition of the power battery is directly related to production safety and after-sale convenience. The battery module is used as a core component of a power battery, and the structural design of the battery module becomes a very important part in the development process of an electric automobile. The current battery module has the following problems:

first, the electrical connections between the first parallel and the second series of battery module modules require additional flexible connections to be made and secured by a large number of screws. The operation is complicated, the screw interfaces are too many, and the mechanization is not facilitated; the potential safety hazard that the screw falls is increased;

secondly, the connection position of the bus bars among the modules of the existing battery module is positioned at the top end of the module, and the bus paths are downward and upward, so that the current balance among the membrane modules is not facilitated, and the current-balancing property is not good.

In view of the above, it is desirable to provide a battery module connecting structure to overcome the disadvantages of the prior art.

[ Utility model ] content

The utility model aims at providing a battery module connection structure aims at all improving and uses the screw fixation, and complex operation is unfavorable for mechanization, has the potential safety hazard that the screw dropped and the technical problem that current balance nature and flow uniformity are not good between the battery module.

In order to achieve the above object, the present invention provides a battery module connecting structure, which includes at least two battery modules electrically connected in sequence; each battery module comprises a plurality of single battery cells and bus plates arranged at two ends of each single battery cell, and a plurality of conductive parts are arranged at the edges of the bus plates; the conductive part comprises a first conductive segment connected with the bus board and a second conductive segment extending obliquely from one end of the first conductive segment, which is far away from the bus board; and two adjacent battery modules are extruded and attached to form electric connection through corresponding second conductive segments on the two opposite bus plates.

In a preferred embodiment, the number of the conducting parts is four, the first conducting segment is perpendicular to the bus board, and an included angle between the second conducting segment and the first conducting segment is an obtuse angle.

In a preferred embodiment, the device further comprises a plurality of pairs of fixing brackets and a plurality of penetrating rods; the single battery cell of each battery module is arranged between a pair of fixing supports, the bus bar is arranged on one side, away from the corresponding single battery cell, of each pair of fixing supports, and the penetrating rod penetrates through the bus bar to connect and fix all the battery modules.

In a preferred embodiment, the fixing support is provided with a plurality of through holes which correspond to the plurality of single battery cells one to one and through which electrodes of the single battery cells pass.

In a preferred embodiment, the bus bar is provided with a plurality of connecting holes corresponding to the through holes one to one.

In a preferred embodiment, a plurality of buckles and a plurality of clamping grooves are respectively arranged on one side of each pair of fixing brackets away from the corresponding single battery cell, and the opposite sides of two adjacent battery modules are matched and fixedly connected through the buckles and the clamping grooves in a one-to-one correspondence manner.

In a preferred embodiment, the edge of the bus board extends to form a collection end facing the single battery cell.

In a preferred embodiment, the battery module further comprises insulating fixing spacers disposed at both ends of the battery module consisting of all the battery modules.

The beneficial effects of the utility model reside in that: a cylinder manifold is connected through the both ends electricity at monomer electricity core respectively, sets up a plurality of conductive parts on the border of cylinder manifold and constitutes a battery module, contradicts through the conductive part between battery module and the battery module and realizes the electricity and be connected to replace screwed connection, avoid the potential safety hazard that the screw dropped, and easy operation, it is convenient to connect, convenient mechanized operation. The conducting parts are arranged on the middle edge of the bus board, so that the downward and upward movement of current during the bus is reduced, and the conducting parts are arranged in plurality, so that the current is shunted out from each conducting part, the bus balance is improved, and the current uniformity is also improved.

[ description of the drawings ]

Fig. 1 is a perspective view of the power battery module electrical connection structure after the assembly is completed;

fig. 2 is a schematic cross-sectional view of the power battery module electrical connection structure shown in fig. 1;

fig. 3 is a top view of the power battery module electrical connection structure shown in fig. 1;

FIG. 4 is a perspective view of the bus bar shown in FIG. 1;

FIG. 5 is a diagram illustrating an interference state between the two first conductive segments shown in FIG. 3.

In the figure:

10. a battery module; 101. insulating the fixed end plate; 102. fixing a bracket; 103. an accommodating hole; 11. a single cell; 12. a bus bar; 121. a conductive portion; 1211. a first conductive segment; 1212. a second conductive segment; 122. A collection end; 123. connecting holes; 124. a fixing hole; 125. buckling; 126. a card slot; 13. penetrating a rod;

[ detailed description ] embodiments

In order to make the objects, technical solutions and advantageous technical effects of the present invention more clearly understood, the present invention is further described in detail with reference to the accompanying drawings and the following detailed description. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration only and not by way of limitation.

The utility model provides a 100 electric connection structure of power battery module mainly is in order to improve the convenience of electricity connection between the battery module 10 to and equilibrium and the homocline nature when improving between the battery module 10 that the electric current converges.

Referring to fig. 1-5, an embodiment of the present invention includes: at least two battery modules 10 electrically connected in sequence; the specific number of the battery modules 10 is determined by the actual usage space and are electrically connected in sequence.

In the embodiment of the present invention, each battery module 10 includes a plurality of battery cells and 11 and a pair of bus plates 12 electrically connected to two ends of each battery cell 11. In the present embodiment, each battery module 10 is composed of a plurality of unit cells 11 and a pair of bus plates 12, the pair of bus plates 12 are respectively disposed at two ends of the unit cells 11 and electrically connected to the unit cells 11, wherein the bus plates 12 are made of a material having an electrical conductivity, such as copper, which is inferior to silver in electrical conductivity, copper has good ductility and high thermal and electrical conductivity, and thus is commonly used for cables and electrical and electronic components.

The edge of each bus bar 12 extends to form a plurality of conductive portions 121 with elasticity, in this embodiment, the bus bar 12 is rectangular, and has two long sides and two short sides, two spaced regions are cut out in the middle of each long side, and the region is bent for two sections in the direction away from the corresponding single battery cell 11 to form the conductive portions 121, so that the current is shunted through the four conductive portions 121, and the current uniformity is improved.

In an embodiment of the present invention, the conductive portion 121 includes a first conductive segment 1211 connected to the bus bar and a second conductive segment 1212 extending obliquely from an end of the first conductive segment away from the bus bar. In this embodiment, the first conductive segment 1211 is integrally connected to the bus bar 12, the second conductive segment 1212 is integrally connected to the first conductive segment 1211, and the first conductive segment 1211 is bent away from the unit cell 11 and perpendicular to the bus bar 12; one end of the first conductive segment 1211, which is far away from the bus bar 12, extends obliquely in a direction away from the cell 11 to form a second conductive segment 1212, wherein an included angle between the first conductive segment 1211 and the second conductive segment 1212 is an obtuse angle, when the two battery modules 10 are close to each other by an opposite acting force, the second conductive segments 1212 on the two battery modules 10 are in contact with each other, and as the acting force continues, the included angle between the second conductive segment 1212 and the first conductive segment 1211 gradually changes from the obtuse angle to a right angle, so that the second conductive segments 1212 on the two adjacent battery modules 10 are completely attached together, and the first conductive segments 1211 are also in contact with each other, thereby achieving electrical connection between the two adjacent battery modules 10, and meanwhile, because the conductive portion 121 is elastic, the second conductive segments 1212 generate a reaction force opposite to the acting force, so that the two second conductive segments 1212 are tightly attached together even when the external acting force is lost, therefore, the connection is firmer, the connection mode is simple and convenient, and compared with the mode of adopting screw connection, the assembly time can be greatly reduced, and the assembly efficiency is effectively improved.

Further, in one embodiment, to prevent the battery module 10 from being influenced by the reaction force generated by the second conductive segments 1212 when the battery module 10 is pressed, the battery module 10 is dislocated; each battery module 1212 is provided with a pair of fixing brackets 102 for fixing the battery cells 11 and a plurality of through rods 13 for fixing the battery modules 10, each battery cell of each battery module 10 is arranged between the pair of fixing brackets 102, and the bus bar 12 is arranged on one side of the fixing bracket 102 away from the corresponding battery cell 11; the fixing supports 102 are provided with through holes 103 which correspond to the plurality of single battery cells 11 one by one and allow the electrodes of the single battery cells 10 to pass through, so that the plurality of single battery cells 11 are fixed between the pair of fixing supports 102; be equipped with the connecting hole 123 with through-hole 103 one-to-one on the cylinder manifold 12, the electrode of monomer electricity core 11 passes through-hole 103 and imbeds in the connecting hole 123 and is connected with cylinder manifold 12 electricity, and cylinder manifold 12 still is equipped with four fixed orificess that supply to wear pole 13 to pass, and it is equipped with four to wear pole 13, is located four corners of battery module 10 respectively, wears pole 13 and passes fixed bolster 102 and cylinder manifold 12 to be in the same place a plurality of battery module 10 are fixed. The penetrating rod 13 is made of hard materials, such as iron and steel, wherein the iron has good ductility and high hardness, and the cost is low. During extrusion, the battery module 10 is limited by the penetrating rod 13, so that the battery module can only move along the penetrating rod 13 until the conductive parts are completely attached, and the situation of dislocation is avoided.

Further, in one embodiment, the bus bar 12 is further provided with a collecting terminal 122, which is convenient for collecting the temperature and voltage of the battery and connecting with the outside; the collecting end 122 extends out from the middle of a short side of the bus bar 12, and one end far away from the short side is bent perpendicularly towards the single battery cell 11 to form the collecting end 122.

Further, in an embodiment, in order to avoid that the battery module 10 is extruded excessively to cause the conductive portion to deform seriously due to the fact that the extrusion degree cannot be determined visually, and even the conductive portion is broken, and meanwhile, the battery module 10 is prevented from rebounding due to the influence of the reaction force of the conductive portion after losing the acting force, four fasteners 125 and four slots 126 are respectively arranged on two sides of a pair of fixing brackets 103 on each battery module 10 away from the corresponding single battery cell 11, during installation, one side of two adjacent battery modules 10 with four slots 126 is provided with four fasteners 125, and when the two battery modules 10 approach each other, the slots 126 are fastened and fixed with the fasteners 125. When two adjacent battery modules 10 approach each other, the buckle 126 is buckled with the slot 125, and the total length of the buckled buckle 125 and the slot 126 is less than or equal to the total length of the abutted first conductive sections 1211 of the two battery modules 10, so that after the buckle 125 is buckled with the slot 126, the two adjacent battery modules 10 cannot approach each other due to the resistance of the buckle 125 and the slot 126, and because the total length of the buckle 125 and the slot 126 is less than or equal to the total length of the two abutted first conductive sections 1211, the second conductive sections 1212 of the two battery modules 10 are completely attached, and the extrusion degree can be intuitively known through the buckling of the slot 126 and the buckle 125.

Further, in one embodiment, the battery module 100 is composed of a plurality of battery modules 10, and bus bars 12 are disposed at both ends of each battery module 10, so that exposed bus bars 12 may appear at both ends of the battery module 100, and in order to prevent the exposed bus bars 12 and the penetrating rods penetrating through the bus bars 12 from leaking electricity, an insulating fixing end plate 101 is disposed at both ends of the battery module 100, respectively, so as to isolate the bus bars 12 and the penetrating rods from contacting with the outside, thereby preventing the occurrence of an electricity leakage accident.

To sum up, the utility model provides a 100 electric connection structure of power battery module, through the both ends at monomer electricity core 11 respectively the electricity connect a cylinder manifold 12, set up a plurality of conductive parts 121 on the border of cylinder manifold 12 and constitute a battery module 10, conflict through conductive part 121 between battery module 10 and the battery module 10 and realize the electricity and be connected to replace screwed connection, avoid the potential safety hazard that the screw dropped, and easy operation, it is convenient to connect, makes things convenient for mechanized operation, improves and changes to join in marriage efficiency. The conductive portions 121 are disposed on the middle edge of the bus bar 12, so as to reduce the downward and upward movement of the current when the current is converged, and a plurality of conductive portions 121 are disposed, so that the current is shunted from each conductive portion 121, thereby improving the current convergence balance and improving the current uniformity.

The invention is not limited solely to that described in the specification and the embodiments, and additional advantages and modifications will readily occur to those skilled in the art, and it is not intended to be limited to the specific details, representative apparatus, and illustrative examples shown and described herein, without departing from the spirit and scope of the general concept as defined by the appended claims and their equivalents.

Claims (8)

1. A battery module connecting structure is characterized by comprising at least two battery modules which are electrically connected in sequence; each battery module comprises a plurality of single battery cells and bus plates arranged at two ends of each single battery cell, and a plurality of elastic conductive parts are arranged at the edges of the bus plates; the conductive part comprises a first conductive segment connected with the bus board and a second conductive segment extending obliquely from one end of the first conductive segment, which is far away from the bus board; and two adjacent battery modules are extruded and attached to form electric connection through corresponding second conductive segments on the two opposite bus plates.

2. The battery module connecting structure according to claim 1, wherein the number of the conductive portions is four, the first conductive segment is perpendicular to the bus bar, and an included angle between the second conductive segment and the first conductive segment is an obtuse angle.

3. The battery module connecting structure according to claim 1, further comprising a plurality of pairs of fixing brackets and a plurality of penetration rods; the single battery cell of each battery module is arranged between a pair of fixing supports, the bus bar is arranged on one side, away from the corresponding single battery cell, of each pair of fixing supports, and the penetrating rod penetrates through the bus bar to connect and fix all the battery modules.

4. The battery module connecting structure according to claim 3, wherein the fixing bracket is provided with a plurality of through holes which correspond to the plurality of battery cells one to one and through which electrodes of the battery cells pass.

5. The battery module connecting structure according to claim 4, wherein the bus bar is provided with a plurality of connecting holes corresponding to the through holes one to one.

6. The battery module connecting structure according to claim 5, wherein a plurality of buckles and a plurality of clamping grooves are respectively arranged on one side of each pair of fixing brackets away from the corresponding single battery cell, and the opposite sides of two adjacent battery modules are fixedly connected in a one-to-one corresponding fit manner through the buckles and the clamping grooves.

7. The battery module connecting structure according to claim 1, wherein an edge of the bus plate extends to form a collection end facing the cell.

8. The battery module connecting structure according to claim 1, further comprising insulating fixing spacers provided at both ends of the battery module consisting of all the battery modules.

Images