CN108075051A - Power battery module and the power battery box with power battery module - Google Patents

Abstract

The present invention relates to power battery field, more particularly, to a kind of power battery module and the power battery box with power battery module.The power battery module includes modular cartridge and battery core.More than one is formed in the modular cartridge for installing the groove body of battery core；The upper and lower side of the modular cartridge is respectively arranged with upper conductive sheet and the lower conductive sheet for connecting the battery core side electrode and lower lateral electrode；The conductive sheet outboard cover is equipped with insulating trip.Battery module and power battery box provided by the invention are simple in structure, and mounting means is simple, and easy to disassemble, maintenance, have great practicability.

Description

Power battery module and power battery box with power battery module

technical field

The invention relates to the field of power batteries, in particular to a power battery module and a power battery box with the power battery module.

Background technique

As people's awareness of environmental protection becomes stronger and stronger, electric vehicles are becoming more and more popular as a means of transportation. With the growth of electric vehicles, the traditional solution of using lead-acid batteries is no longer applicable. Not only can it not guarantee the safety of power battery packs, the consistency of installation and the convenience of disassembly and assembly, but also the post-recycling process will cause serious pollution, and it is not convenient to organize production and post-maintenance.

In view of the above defects, the present invention provides a power battery box, which can realize group assembly of battery cells, and is convenient for disassembly, repair and maintenance.

Contents of the invention

The purpose of the present invention is to provide a power battery module and a power battery box with the power battery module, which can realize group assembly of battery cells and are convenient for disassembly, maintenance and repair.

The present invention firstly provides a power battery module, including a module box and a battery cell. The module box is formed with more than one groove body for installing the battery cell; the upper and lower sides of the module box are respectively provided with an upper conductive sheet and a lower conductive sheet connected to the upper electrode and the lower electrode of the battery cell ; The outer sides of the upper conductive sheet and the lower conductive sheet are respectively covered with insulating sheets.

Preferably, the module box includes an upper cover and a lower cover; the tank body includes an upper tank body and a lower tank body; the upper tank body is formed in the upper cover; the lower tank body is formed in the lower tank body The upper cover and the lower cover are detachably fixed together.

Preferably, the upper cover and the lower cover are snap-connected by snap-fitting parts.

Preferably, the engaging member includes a buckle formed on the upper cover and a tab formed on the lower cover, and a slot matching the buckle is formed on the tongue.

Preferably, at least one pillar for supporting and/or detachably fixing the upper cover is formed on the lower cover.

Preferably, a plurality of grooves are formed on the surrounding sides of the upper cover and the lower cover.

Preferably, the plurality of grooves include positioning grooves and/or bar grooves, and protruding rods are formed in the bar grooves.

Preferably, the upper conductive sheet is provided on the outer side of the upper cover, the lower conductive sheet is arranged on the outer side of the lower cover, and the upper conductive sheet and the lower conductive sheet pass through a plurality of cards on the outer edges of the upper cover and the lower cover respectively. The fasteners are limited on the upper cover and the lower cover.

Preferably, the outer cover of the upper conductive sheet is provided with an upper insulating sheet, the outer cover of the lower conductive sheet is provided with a lower insulating sheet, and the upper insulating sheet and the lower insulating sheet completely cover the upper conductive sheet and the lower conductive sheet respectively. , and are respectively limited on the upper cover and the lower cover by a plurality of buckles on the outer edges of the upper cover and the lower cover.

Preferably, the upper conductive sheet, the lower conductive sheet, the upper insulating sheet and the lower insulating sheet are also provided with corresponding through holes.

Preferably, the conductive sheet includes a base body, the base body is formed by a combination of copper bars and nickel sheets; a number of through holes are opened on the base body, and strips for electrical connection are formed on the base body. The strip-shaped flange is formed by extending the nickel sheet.

Preferably, the ends of the strip-shaped flanges are provided with raised bumps.

Preferably, the strip-shaped flange is provided with a long hole extending along the length direction of the strip-shaped flange, and each end of the strip-shaped flange is provided with two protruding points and are respectively located in the long strip hole. sides.

Preferably, the elongated hole has a straight section, and the strip-shaped flange forms two parallel straight arms.

Preferably, the protruding point is arranged to be located at the center of the through hole, the protruding height of the protruding point is 0.2-0.4 mm, and the diameter of the protruding point is 1-1.5 mm.

Preferably, arc grooves are formed at the connection between the strip flange and the base body.

Preferably, at least one of a conductive post, a conductive post sleeve, a conductive sleeve, a female plug, and a tower spring is provided on the base.

Preferably, the tower spring is arranged on a bending piece extending outward from the base body and bent in a direction perpendicular to the base body.

Preferably, the conductive post sleeve and/or the conductive sleeve includes a conductive sleeve and a conductive spring inside.

Preferably, the conductive sleeve and the conductive core form a power battery connection structure; the conductive sleeve is provided with one or more elastic conductive members; the conductive core includes a core barrel and a conductive core in the core barrel; The core body is detachably socketed with the conductive sleeve, and the core body is in contact with the elastic conductive member when socketed.

Preferably, when the core body is socketed with the conductive sleeve, the elastic conductive member is clamped by the outer wall of the core and the inner wall of the conductive sleeve.

Preferably, the inner wall of the conductive sleeve is provided with one or more conductive ring grooves, the elastic conductive member is arranged in the conductive ring groove, and the elastic conductive member is interference-fitted with the conductive ring groove.

Preferably, the elastic conductive member is an annular conductive spring.

Preferably, the conductive sleeve includes a sleeve, and the sleeve includes a sleeve, and the inner walls at both ends of the sleeve are respectively provided with one or more elastic conductive members.

Preferably, the inner wall of the conductive sleeve is provided with at least one first sealing ring groove, the first sealing ring groove is provided between the elastic conductive member and the opening of the conductive sleeve socket core, the first sealing ring groove is A sealing ring groove is provided with a first sealing ring.

Preferably, an annular stop ring is provided on the outer wall at the middle position of the sleeve.

Preferably, the core body includes a first core body and a second core body at both ends thereof, the diameter of the second core body is smaller than the first core body, and the diameter of the first core body is the same as the inner diameter of the cylinder body Adaptively, the second core is socket-connected with the sleeve of the conductive sleeve.

Preferably, the core barrel includes a cylinder body, and at least one second sealing ring is respectively provided on the inner wall at both ends of the cylinder body and on the outer wall of the second core.

Preferably, the inner wall of the cylinder at the junction of the first core and the second core is provided with a second sealing ring groove, and both ends of the second sealing ring groove have protrusions on the inner wall of the cylinder, the The second sealing ring is limited in the second sealing ring groove.

The present invention also provides a power battery box, comprising: a box body; and a battery module placed in the box, which includes a plurality of any of the aforementioned battery modules fixedly arranged side by side.

The battery module and the power battery box provided by the present invention have a simple structure, a simple installation method, and are convenient for disassembly, repair and maintenance, and have great practicability.

Description of drawings

Fig. 1 is a schematic structural view of an embodiment of the power battery box of the present invention.

Fig. 2 is a schematic diagram of the internal structure of the power battery box shown in Fig. 1 .

Fig. 3 is a schematic structural diagram of an embodiment of the module box of the present invention.

Fig. 4 is a schematic diagram of the inverted structure of the module box shown in Fig. 3 .

Fig. 5 is a schematic structural view of an embodiment of the copper-nickel conductive sheet of the present invention.

FIG. 6 is a partially enlarged schematic view of area A in FIG. 5 .

Fig. 7 is a schematic structural view of an embodiment of the copper-nickel conductive sheet with a conductive sleeve according to the present invention.

Fig. 8 is a schematic structural view of an embodiment of the copper-nickel conductive sheet with a female plug of the present invention.

Fig. 9 is a schematic perspective view of an embodiment of the conductive sleeve of the present invention.

FIG. 10 is an exploded perspective view of the three-dimensional structure of the conductive sleeve shown in FIG. 9 .

FIG. 11 is a schematic plan view of the conductive sleeve shown in FIG. 9 .

Fig. 12 is a cross-sectional view of the conductive sleeve shown in Fig. 11 along line A-A.

FIG. 13 is a schematic structural view of a sleeve of the conductive sleeve shown in FIG. 10 .

Fig. 14 is a sectional view of the sleeve shown in Fig. 13 along line B-B.

Fig. 15 is a schematic perspective view of an embodiment of the conductive core of the present invention.

FIG. 16 is an exploded schematic view of the three-dimensional structure of the conductive core shown in FIG. 15 .

FIG. 17 is a schematic plan view of the conductive core shown in FIG. 15 .

Fig. 18 is a cross-sectional view of the conductive core shown in Fig. 17 along line A-A.

FIG. 19 is a schematic plan view of the core barrel of the conductive core shown in FIG. 16 .

Fig. 20 is a cross-sectional view of the core cylinder shown in Fig. 19 along line B-B.

Fig. 21 is a schematic perspective view of an embodiment of the connection structure of the battery module of the present invention.

FIG. 22 is an exploded perspective view of the connection structure of the battery module shown in FIG. 21 .

FIG. 23 is a schematic plan view of the connection structure of the battery modules shown in FIG. 21 .

Fig. 24 is a cross-sectional view along line A-A of the connection structure of the battery module shown in Fig. 23 .

Detailed ways

Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined arbitrarily with each other.

The embodiment of the present invention takes the vehicle-mounted power battery box as an example, which includes a box body and a battery module located in the box. body) and at least one conductive cell (ie, the battery module connecting structure, used for electrical connection with adjacent battery modules). The module box includes an upper cover and a lower cover, and the outer sides of the upper cover and the lower cover are buckled and connected to the conductive sheet and the insulating plate respectively. Two grooves are respectively arranged on the left and right sides of the module box, and are used for snapping in the clamping strips when forming a group. Protruding rods matched with the clamping strips are correspondingly arranged in the grooves. There are also two slots on the top edge of the module box, which are used to snap into the card strips when they are grouped, and to fix the signal acquisition board on the card strips. The copper-nickel conductive sheet is pre-fixed with a tower spring, which is folded into the top edge groove, and the signal acquisition board is inserted into the groove with the card strip to contact the tower spring to realize electrical connection.

As shown in FIGS. 1 and 2 , a power battery box according to an embodiment of the present invention generally includes: a box body 1 , a battery module 2 and a clip 3 .

A plurality of battery modules arranged side by side constitute a battery module 2, the battery module is equipped with a plurality of battery cells, and the battery module 2 is arranged side by side in the box body 1; the clip bar 3 locks and fixes the battery module 2 into one body. The battery module 2 is an integral structure including at least a module box, a cell, a conductive cell, a conductive sheet, and an insulating sheet.

As shown in Fig. 3 and Fig. 4, a module box of a battery module 2 of the present invention includes: an upper cover 21 and a lower cover 22; 22 is formed with a lower tank body 221 corresponding to the upper tank body 211 for installing batteries; the upper cover 21 and the lower cover 22 are snapped together. Wherein, one or more conductive electric cores can be installed in the tank body.

A protruding buckle 231 is formed on the upper cover 21 , and a tongue 232 is formed on the lower cover 22 , and a groove 233 matching the buckle 231 is defined on the tongue 232 . The upper cover 21 and the lower cover 22 are locked together by the buckle 231 and the slot 233 on the tongue 232 . Wherein, the positions of the buckle and the tongue can be interchanged; the manner of engagement is not limited to the buckle, tongue and groove of this embodiment; the upper and lower covers can also be detachable fixing methods other than the engagement.

The outer side of the upper cover 21 (ie, the upper surface of the upper cover) is provided with an upper conductive sheet 241 connected to the electrode on one side of the battery cell 106, and the outer side of the lower cover 22 (ie, the lower surface of the lower cover) is provided with a conductive sheet 241 connected to the other side of the battery cell 106. The lower conductive sheet 242 of the electrode. The outer side of the upper conductive sheet 241 (ie, the upper surface of the upper conductive sheet) is covered with an upper insulating sheet 251 , and the outer side of the lower conductive sheet 242 (ie, the lower surface of the lower conductive sheet) is covered with a lower insulating sheet 252 . Among them, the conductive sheet is used to realize the series and parallel connection between multiple cells, and the insulating sheet is used to prevent the conductive sheets from contacting each other after multiple modules are stacked, so it is set to at least completely cover the size of the conductive sheet. The conductive sheet is covered by an insulating sheet, only the edges of which are shown.

In this embodiment, the conductive sheet is limited on the upper cover and the lower cover by a plurality of buckles on the outer side edges of the upper cover and the lower cover, and is welded and fixedly connected to the positive pole or negative pole of the battery cell in the module box, and the insulating sheet is also fixed. The upper cover and the lower cover are limited on the upper cover and the lower cover through a plurality of buckle parts on the outer side edges of the upper cover and the lower cover.

In order to realize the series connection of each module in the battery module, a plurality of through holes (six in this embodiment, as shown in Fig. The conductive cell can be set in the shape of the cell, set in the upper tank and the lower tank, and electrically connected with the conductive cell in the adjacent module through the conductive member, so as to realize the passage between the modules.

The inside or surroundings of the lower cover 22 are also formed with pillars 26 supporting the upper cover 21, which evenly support the upper cover 21. Meanwhile, these pillars are hollow, and the space in which they are located can also help prevent the battery area from overheating. Among them, there may be multiple pillars, including but not limited to pillars that only lean against the upper cover for support, and detachable and fixed pillars that are provided with snap pieces at the top and engage with corresponding parts of the upper cover, and so on.

A plurality of grooves 27 are formed on the sides of the upper cover 21 and the lower cover 22, including positioning grooves for vertical alignment and positioning when multiple battery modules are stacked, and fixing clips for multiple battery modules to be stacked. The clip groove of the clip, wherein a protruding rod 271 is formed in the clip groove, so as to be engaged with the clip with a clip hole.

5-8 show embodiments of the conductive sheet of the present invention.

As shown in FIG. 5 , the conductive sheet includes a base body 41 , and the base body 41 is formed by welding a copper bar and a nickel sheet, such as laser welding. A plurality of through holes 42 (as shown in FIG. 6 ) are opened on the base body 41 , and the through holes 42 are in one-to-one correspondence with the battery cells (not shown) arranged in the module box.

FIG. 6 is a partially enlarged schematic view of area A in FIG. 5 , showing the structure of a through hole 42 . The substrate 41 is formed with a strip-shaped flange 43 located in the through hole 42. The strip-shaped flange 43 is formed by extending from a nickel sheet, preferably extending toward the center of the through-hole. The strip-shaped flange 43 is formed in the through-hole 42. It is arranged symmetrically inside, and arc grooves are respectively formed at the joints with the base body 41 . The strip flanges 43 are used to form electrical connection with the positive and negative poles of the electric core by means of welding, etc., and each end of the strip flanges 43 has two bumps 44 (as shown in FIG. 6 ). The four bumps 44 at the center of the hole are set to protrude toward the surface of the positive and negative poles of the battery cell, and serve as electrical connection points for welding to the positive and negative poles of the battery core.

The strip flange 43 can also be provided with a strip hole 45 extending along the length direction of the strip flange 43, so as to reduce the strength of the strip flange and make the end bumps of the strip flange more compact. It is easy to be pressed tightly on the surface of the positive and negative poles of the battery; at the same time, if the current overload occurs, the strip-shaped flange with a long hole is easier to fuse, which improves safety; in addition, due to the long hole, the welding current The area to be dispersed is small, and it is easier to concentrate on the four bumps 44 .

Wherein, the bumps can be formed by punching, and the height of the bumps is preferably 0.2-0.4 mm, and the diameter is preferably 1-1.5 mm, so as to facilitate processing and ensure electrical connection after welding. The elongated hole can have a straight section, so that the strip flange forms two parallel straight arms, and both sides of the straight arms are straight lines, so as to ensure that the straight arms are easier to fuse when the current is overloaded.

In order to adapt to the electrical connection between the copper-nickel conductive sheets or the electrical connection with the signal acquisition board, the copper-nickel conductive sheets can include many different forms, for example, some copper bars are equipped with conductive sleeves, and are connected to the conductive core to complete Conduction between modules; some copper bars are equipped with conductive columns, and some copper bars are equipped with conductive column sleeves, both of which are installed in adjacent modules to achieve electrical conduction between modules; some copper bars are equipped with female plugs, and wiring harnesses Some copper bars are pre-fixed with tower springs to realize the electrical connection with the signal acquisition board.

Fig. 7 is a schematic structural view of an embodiment of the copper-nickel conductive sheet with a conductive sleeve according to the present invention. Wherein, reference numeral 7 denotes a tower spring, and reference numeral 5 denotes a conductive sleeve.

The tower spring 7 is mounted on a bending piece 47 extending outward from the base body 41 and bent in a direction perpendicular to the base body 41 . The bent piece 47 is folded into the top edge groove of the module box, and contacts with the contact points preset on the signal acquisition board, such as tower springs, conductive discs, etc., to realize the electrical connection between the copper-nickel conductive sheet and the signal acquisition board , for the collection of temperature signals and voltage signals of power batteries.

The conductive sleeve 5 is installed on the extension piece 46 extending outward from the base body 41, including a conductive sleeve and a conductive spring built in the conductive sleeve, and realizes electrical connection with the conductive sleeve on another module through the conductive core. Thus, conduction between modules is realized. The conductive spring can be an annular structure wound by a conductive coil, is elastic, and can maintain electrical connection during bumps. Wherein, the conductive core can be set at the position of a certain battery cell in the battery module, one end of which can be set to be connected to a conductive sleeve, and the other end can be set to be connected to a separate conductive sleeve, and the separate conductive sleeve can be connected to another One end is also connected to the conductive core on the other battery module, and the electrical connection between the two modules is realized through the conductive sleeve on the other battery module.

Fig. 8 is a schematic structural view of an embodiment of the copper-nickel conductive sheet with a female plug of the present invention. Wherein, reference numeral 7 represents a tower spring, and reference numeral 9 represents a female plug.

The relevant structure and effect of the tower spring 7 are as described above. The female plug 9 is disposed on the protruding piece of the base 41 , and a battery module has a pair of positive and negative female plugs 9 . The female plug 9 is used to insert the wire harness head to realize the electrical connection between two battery modules, or the electrical connection between a battery module and a high voltage module. The wire harness head (not shown), including a shell, a plug, a socket, a compression spring and a conductive spring, is inserted into the female plug 9 to realize electrical connection.

In another embodiment, a conductive column on the bottom surface of a battery module is equipped with a downwardly disposed conductive column, and the top conductive sheet of the adjacent lower battery module is equipped with a downwardly disposed conductive column sleeve, and the two are socketed. Conduct electricity between modules. Wherein, the conductive column sleeve includes a conductive sleeve and a conductive spring inside.

Figures 9-14 show the embodiment of the conductive sleeve of the present invention. The conductive sleeve is used as a component of the conductive cell, and the conductive cores of two adjacent battery modules are respectively socketed with a conductive sleeve to realize the electrical connection of the two battery modules. .

As shown in Figures 9-14, the conductive sleeve 5 includes a sleeve 52, the sleeve 52 includes a tubular sleeve 521, and the middle part of the outer wall of the sleeve 521 is provided with an annular stop ring 522, the sleeve 521 Both ends of the inner wall are respectively provided with a conductive ring groove array composed of annular conductive ring grooves 523 and a sealing ring groove array composed of annular first sealing ring grooves 524, and a detachable annular ring groove is respectively provided in the conductive ring grooves 523. The conductive spring 53 is provided with a detachable annular first sealing ring 54 in the first sealing ring groove 524 respectively. Wherein, the conductive spring preferably interferes with the conductive ring groove, and the first sealing ring preferably interferes with the first sealing ring groove.

The sleeve 52 is made of copper, the first sealing ring 54 is made of rubber, and the conductive spring 53 is a silver-plated spring.

When in use, two conductive cores can be socketed at both ends, and the conductive core includes a core barrel and a conductive core body inside the core barrel, and the core body contacts the conductive spring in the conductive sleeve when socketed. The limiting ring on the outer wall of the sleeve is used to limit the end edge of the conductive core sleeved at both ends.

When in use, as shown in Figure 14, a pair of conductive ring grooves 523 and a sealing ring groove 524 are respectively provided at both ends of the inner wall of the sleeve 521, of course, the number of conductive ring grooves 523 and the first sealing ring groove 524 can be increased as required reduce. When connecting the battery, due to the elasticity of the conductive spring 53 itself, it is preferably arranged as a ring structure wound by a conductive coil (the conductive coil is wound along a circular path). It is compressed and deformed, so that even in a bumpy environment, the core of the conductive core and the conductive spring slide relative to each other, which will not affect the electrical connection between the two, and improve the axial and radial follow-up of the two. There will be no power outage, sparking, etc., and the connection is reliable and practical.

Figures 15-20 show the embodiment of the conductive core of the present invention. The conductive core is a component of the conductive core. The conductive cores of two adjacent battery modules are respectively socketed with a conductive sleeve to realize the electrical connection of the two battery modules. .

As shown in FIGS. 15 to 20 , the conductive core 6 includes a core barrel 62 and a core body 63 . The core barrel 62 includes a cylindrical cylinder body 621, and the two ends of the inner wall of the cylinder body 621 are respectively provided with a seal ring groove array composed of annular second seal ring grooves 622, and the second seal ring grooves 622 are respectively A separable second sealing ring 64 is provided, the core body 63 includes a cylindrical first core body 631, and a cylindrical second core body 632 is respectively provided at both ends of the first core body 631, the second cylindrical core body 632 The diameter of the core 632 is smaller than that of the first core 631, the diameter of the first core 631 is adapted to the inner diameter of the barrel 621, and the diameter of the second core 632 is adapted to the inner diameter of the second sealing ring 64 , wherein, the second seal ring preferably has an interference fit with the second seal ring groove, and preferably has an interference fit with the second core.

Both ends of the barrel 621 are respectively provided with a trumpet-shaped snap-in interface 623 , which facilitates the insertion operation of the core 63 and the conductive sleeve 521 . The sealing ring preferably interferes with the sealing ring groove, and preferably interferes with the second core body.

The core 63 is made of copper, and the second sealing ring 64 is made of rubber.

In use, either end of the conductive core can be socketed with a conductive sleeve, and the inner wall of the conductive sleeve has a conductive spring, and the second core body 32 is in contact with the conductive spring in the conductive sleeve when socketed.

When in use, the conductive core is used as a battery, and is installed in the cover box to play the role of a conductive path. As shown in FIG. 18 , the user directly snaps the two second sealing rings 64 into the corresponding sealing ring grooves 622 respectively, and the inner wall of the second sealing ring 64 is close to the outer wall of the second core body 632 of the core body 63 . The inner sealing of the core body 63 is realized to prevent the erosion of external water vapor, the effect is obvious, and the practicability is strong.

Of course, the number of sealing ring grooves 622 can be increased or decreased as required to adapt to different working environments.

21-24 show an embodiment of the connection structure of the battery module (ie, the conductive cell) of the present invention.

As shown in FIGS. 21 to 24 , the connection structure includes a conductive sleeve 5 and a conductive core 6 , and the conductive core 6 is connected to the conductive sleeve 5 by plugging.

Here's how to use this connection structure.

As shown in Figure 23 and Figure 24, a conductive sleeve 5 is placed between two connected conductive cores 6, and the core body 63 is directly inserted into the corresponding casing, so that the second core body 632 of the core body 63 and a pair of The conductive spring 53 is in close contact, and the first sealing ring 54 and the second sealing ring 64 form a double sealing structure. Wherein, the inner and outer diameters of the conductive spring 53 are respectively in interference fit with the inner wall of the sleeve 521 and the outer wall of the second core 632, so that the assembled conductive spring 53 is clamped; 1. The outer wall of the second core body 632 is interference fit, so that the assembled first sealing ring 54 is clamped; the inner and outer diameters of the second sealing ring 64 are respectively interference fit with the outer wall of the second core body 632 and the inner wall of the cylinder body 621, so that The assembled second sealing ring 64 is clamped. After assembly, the two ends of the limit ring are respectively abutted by the ends of the two core barrels.

On the other hand, as shown in Figure 18 and Figure 20, both ends of the sealing ring groove 622 have protrusions on the inner wall of the cylinder 621, so that the front and rear ends of the sealing ring 64 are both limited in the sealing ring groove 622, so The benefits include: because the outer end is limited, it resists the end edge protruding ring formed by the first core body wider than the second core body, and the core body is axially limited in the core barrel, but has a certain The axial buffer displacement of the core body; the first core body and the cylinder body are preferably clearance fit, and a certain radial buffer displacement amount of the core body in the core barrel can be realized by using the sealing ring. In the process of assembling the conductive sleeve and the conductive core Socketing can be achieved even if the two are not completely aligned. Of course, the conductive sleeve and the conductive core can preferably be provided with a beveled card interface at the socketed interface, such as the card interface 623 in FIG. 20 . In other embodiments, the first core body can also be interference-fitted with the core barrel to limit the position.

The conductive sleeve, core, and conductive spring in this embodiment are made of conductive materials, and the cores of the two conductive cores can be electrically connected through the conductive springs at both ends of the conductive sleeve. The conductive spring 53 of this embodiment is configured to have elasticity, and is preferably configured as a ring structure wound by a conductive coil (the conductive coil is wound along a circular path). Compression, deformation, so that even in a bumpy environment, the relative sliding of the core body 63 and the conductive spring 53 will not affect the electrical connection of the two adjacent conductive cores N, improving the axial and radial follow-up of the two. Mobility, there will be no power failure, ignition, etc., and the connection is reliable.

It should be noted that the number of the first sealing ring 54 , the second sealing ring 64 and the conductive spring 53 can be increased or decreased according to the needs, and the array in this embodiment refers to a parallel arrangement of more than two related components. The overall structure and internal detail structure of the conductive sleeve and the conductive core are not limited to a circular shape, and may also be a square structure. In this case, the detailed structure such as the conductive spring may be in the shape of a square ring. The conductive spring 53 is not limited to the annular spring structure, and other elastic conductive elements can also be used, for example, a strip-shaped reed is arranged on the inner wall of the sleeve 521, or multiple groups of elastic springs are arranged on the inner wall of the sleeve 521. conductive ball etc. In a word, as long as the conductive element can maintain elastic close contact with the core body 63 .

The sleeve and the core in this embodiment can be made of copper, the first sealing ring and the second sealing ring can be made of rubber, and the conductive spring can be a silver-plated spring.

The connection structure of this embodiment can be made into the shape of a battery cell and installed in the groove of the module box for electrical connection between two battery module boxes composed of battery cells, and can also be used for battery Electrical connections to other structures in the box.

The electrical connection method of the battery module of the present invention may be, but not limited to: divide the battery tank in the module box into multiple areas in advance, and the positive and negative poles of the battery cells in each area are in the same direction, and the two conductive sheets are respectively connected to the The positive and negative electrodes of all battery cells in this area are welded and connected to form a parallel structure of these battery cells, and then two adjacent conductive sheets on the same side are integrated (as shown in the conductive sheet in Figure 5, the left half area is connected) The positive poles of multiple batteries, the right half area is connected to the negative poles of multiple batteries) or conduction, forming a series connection between multiple parallel structures, thereby electrically connecting the battery cells in the entire battery module. The entire battery module will lead to a positive terminal and a negative terminal, which can be used as the positive terminal or negative terminal through the conductive column, conductive column sleeve, conductive sleeve, female plug, etc. protruding from the conductive sheet, such as the positive and negative terminals of two adjacent battery modules. If the poles are in adjacent positions, they can be connected in series through a pair of conductive posts and conductive post sleeves; if they are not in adjacent positions (located on the upper and lower sides of the module box respectively), they can be connected in series through the connection structure of the conductive sleeve and the conductive core.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (30)

1. A power battery module, comprising a module box and a battery cell, characterized in that: There are more than one grooves for installing electric cores formed in the module box; The upper and lower sides of the module box are respectively provided with an upper conductive sheet and a lower conductive sheet electrically connected to the upper electrode and the lower electrode of the cell; The outer sides of the upper conductive sheet and the lower conductive sheet are respectively covered with insulating sheets. 2. The power battery module according to claim 1, characterized in that: The module box includes an upper cover and a lower cover; The tank body includes an upper tank body and a lower tank body; the upper tank is formed in the upper cover; The lower tank body is formed in the lower cover and corresponds to the upper tank body for installing the electric core; The upper cover and the lower cover are detachably fixed together. 3. The power battery module according to claim 2, characterized in that: The upper cover and the lower cover are engaged and connected by means of a locking member. 4. The power battery module according to claim 3, characterized in that: The engaging member includes a buckle formed on the upper cover and a tab formed on the lower cover, and a slot matching the buckle is opened on the tab. 5. The power battery module according to claim 2, characterized in that: At least one pillar for supporting and/or detachably fixing the upper cover is formed on the lower cover. 6. The power battery module according to claim 2, characterized in that: A plurality of grooves are formed on the surrounding sides of the upper cover and the lower cover. 7. The power battery module according to claim 6, characterized in that: The plurality of grooves include positioning grooves and/or bar grooves, and protruding rods are formed in the bar grooves. 8. The power battery module according to claim 2, characterized in that: The upper conductive sheet is arranged on the outer side of the upper cover, and the lower conductive sheet is arranged on the outer side of the lower cover, and the upper conductive sheet and the lower conductive sheet are respectively limited by a plurality of buckles on the outer edges of the upper cover and the lower cover. on the upper and lower covers. 9. The power battery module according to claim 8, characterized in that: The outer cover of the upper conductive sheet is provided with an upper insulating sheet, the outer cover of the lower conductive sheet is provided with a lower insulating sheet, and the upper insulating sheet and the lower insulating sheet completely cover the upper conductive sheet and the lower conductive sheet respectively, and respectively The upper cover and the lower cover are limited on the upper cover and the lower cover through a plurality of buckle parts on the outer edges of the upper cover and the lower cover. 10. The power battery module according to claim 9, characterized in that: The upper conductive sheet, the lower conductive sheet, the upper insulating sheet and the lower insulating sheet are also provided with corresponding through holes. 11. The power battery module according to claim 1 or 8, characterized in that: The conductive sheet includes a base body, the base body is formed by a combination of copper bars and nickel sheets; a number of through holes are opened on the base body, and strip-shaped flanges for electrical connection in the through holes are formed on the base body , the strip-shaped flange is formed by extending the nickel sheet. 12. The power battery module according to claim 11, characterized in that: The ends of the strip flanges are provided with protruding bumps. 13. The power battery module according to claim 12, characterized in that: The strip-shaped flange is provided with a long hole extending along the length direction of the strip-shaped flange, and the end of each strip-shaped flange is provided with two protruding points located on both sides of the long strip hole. 14. The power battery module according to claim 13, characterized in that: The elongated hole has a straight section, and the strip-shaped flange forms two parallel straight arms. 15. The power battery module according to claim 14, characterized in that: The protruding point is arranged to be located at the center of the through hole, the protruding height of the protruding point is 0.2-0.4 mm, and the diameter of the protruding point is 1-1.5 mm. 16. The power battery module according to claim 15, characterized in that: A circular arc groove is formed at the joint between the strip-shaped flange and the base body. 17. The power battery module according to claim 1 or 11, characterized in that: The conductive sheet includes a base body, on which at least one of a conductive column, a conductive column sleeve, a conductive sleeve, a female plug, and a tower spring is arranged. 18. The power battery module according to claim 17, characterized in that: The tower spring is arranged on a bending piece extending outward from the base body and bent in a direction perpendicular to the base body. 19. The power battery module according to claim 17, characterized in that: The conductive post sleeve and/or the conductive sleeve includes a conductive sleeve and a conductive spring inside. 20. The power battery module according to claim 17, characterized in that: The conductive sleeve and the conductive core form a power battery connection structure; the conductive sleeve is provided with one or more elastic conductive parts; the conductive core includes a core tube and a conductive core in the core tube; the core The body and the conductive sleeve are detachably socketed, and the core is in contact with the elastic conductive member when socketed. 21. The power battery module according to claim 20, characterized in that: When the core body is socketed with the conductive sleeve, the elastic conductive member is clamped by the outer wall of the core and the inner wall of the conductive sleeve. 22. The power battery module according to claim 21, characterized in that: The inner wall of the conductive sleeve is provided with one or more conductive ring grooves, the elastic conductive member is arranged in the conductive ring groove, and the elastic conductive member is interference fit with the conductive ring groove. 23. The power battery module according to any one of claims 20-22, characterized in that: The elastic conductive member is an annular conductive spring. 24. The power battery module according to any one of claims 20-22, characterized in that: The conductive sleeve includes a sleeve, and the sleeve includes a sleeve, and the inner walls at both ends of the sleeve are respectively provided with one or more elastic conductive members. 25. The power battery module according to claim 24, characterized in that: The inner wall of the conductive sleeve is provided with at least one first sealing ring groove, the first sealing ring groove is arranged between the elastic conductive member and the opening of the conductive sleeve socket core, and the first sealing ring A first sealing ring is arranged in the groove. 26. The power battery module according to claim 24, characterized in that: An annular stop ring is also provided on the outer wall at the middle position of the sleeve. 27. The power battery module according to claim 25 or 26, characterized in that: The core body includes a first core body and a second core body at both ends thereof, the diameter of the second core body is smaller than the first core body, and the diameter of the first core body is adapted to the inner diameter of the cylinder body, The second core is socket-connected with the sleeve of the conductive sleeve. 28. The power battery module according to claim 27, characterized in that: The core barrel includes a cylinder body, and at least one second sealing ring is respectively provided on the inner wall at both ends of the cylinder body and on the outer wall of the second core. 29. The power battery module according to claim 28, characterized in that: The inner wall of the cylinder at the junction of the first core and the second core is provided with a second seal ring groove, and both ends of the second seal ring groove have protrusions on the inner wall of the cylinder, and the second seal The ring limit is located in the second sealing ring groove. 30. A power battery box, characterized in that it comprises: box; The battery module is placed in the box, which includes a plurality of battery modules according to any one of claims 1-29 fixedly arranged side by side.