CN220306455U

CN220306455U - Battery and battery pack

Info

Publication number: CN220306455U
Application number: CN202321628975.XU
Authority: CN
Inventors: 程胜兵; 蒋远富; 董冰; 李博一
Original assignee: Cornex New Energy Co ltd
Current assignee: Cornex New Energy Co ltd
Priority date: 2023-06-25
Filing date: 2023-06-25
Publication date: 2024-01-05
Anticipated expiration: 2033-06-25

Abstract

The utility model discloses a battery and a battery pack, wherein the battery comprises a battery shell, a positive connector, a negative connector and a core pack, the battery shell is provided with a slot, a first hole and a second hole, the first hole and the second hole are used for inserting a conductor, the positive connector and the negative connector are arranged on the battery shell, the positive connector is connected between the first hole and the slot, the negative connector is connected between the second hole and the slot, the core pack comprises a positive lug and a negative lug, the core pack is in plug-in fit with the slot, the positive lug is electrically connected with the positive connector, and the negative lug is electrically connected with the negative connector. The battery and the battery pack facilitate series-parallel arrangement, and reduce maintenance cost and production cost.

Description

Battery and battery pack

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery and a battery pack.

Background

As a power source for new energy automobiles and the like, demand for power batteries has increased rapidly in recent years. The current power battery adopts a mode of connecting a plurality of battery cells in series and parallel, namely when the battery cells are connected in series and parallel, a busbar is required to be connected with each battery cell in a welding mode, and after the battery cells are connected in series and parallel, the battery cells are required to be connected and fixed in a gluing mode so as to ensure the integrity of the battery cells.

The series-parallel welding process is complex, time-consuming and labor-consuming, so that the production efficiency of the power battery is low, and the cost of the power battery is high. Secondly, the arrangement of the structural adhesive also makes disassembly between the battery cells difficult, increases the maintenance difficulty of the battery, and when the local battery cells are damaged, the whole power battery is replaced in the conventional mode, so that the use cost of a user is high, and the popularization of new energy automobiles is not facilitated.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems in the related art to some extent.

Therefore, the embodiment of the utility model provides the battery which is convenient for series-parallel arrangement and reduces the maintenance cost and the production cost.

The embodiment of the utility model also provides a battery pack comprising the battery.

The battery of the embodiment of the utility model comprises:

the battery case is provided with a slot, a first hole and a second hole, and the first hole and the second hole are used for inserting the electric conductor;

the positive connector and the negative connector are arranged on the battery shell, the positive connector is connected between the first hole and the slot, and the negative connector is connected between the second hole and the slot;

the core package, the core package includes anodal ear and negative pole ear, the core package grafting fit in the slot, just anodal ear with positive connector electricity is connected, negative pole ear with negative connector electricity is connected.

The battery of the embodiment of the utility model is convenient for series-parallel arrangement, and reduces maintenance cost and production cost.

In some embodiments, the battery case has a length direction, the first hole, the second hole, the slot are spaced apart in the length direction, and the slot is located between the first hole and the second hole.

In some embodiments, the positive connector includes a first elastic portion, at least a portion of which extends into the slot, and the first elastic portion is configured to elastically contact the positive tab to achieve an electrical connection;

and/or the negative connector comprises a second elastic part, at least part of the second elastic part stretches into the slot, and the second elastic part is used for elastically contacting with the negative electrode lug to realize electric connection.

In some embodiments, the positive connector includes a first rolling member, at least a portion of the first rolling member extending into the first bore, the first rolling member for rolling contact with the electrical conductor;

the negative connector comprises a second rolling element, at least part of the second rolling element extends into the second hole, and the second rolling element is used for rolling contact with the electric conductor.

In some embodiments, the positive connector includes a positive post to which the first rolling member is rolling fitted;

and/or, the negative connector comprises a negative pole, and the second rolling piece is assembled on the negative pole in a rolling way.

In some embodiments, the battery case is provided with a plurality of mounting holes for fixing a connection member to achieve connection fixation of the two battery cases.

In some embodiments, the battery case has magnetism so that a plurality of the battery cases can be connected and fixed by means of magnetic attraction;

and/or, the battery case comprises a shell body and a cover body, the slot, the first hole and the second hole are all arranged on the shell body, and the cover body is blocked at the notch of the slot.

The battery pack of the embodiment of the utility model includes the battery described in any of the above embodiments.

In some embodiments, the battery pack includes an electrical conductor including a first electrical conductor and a second electrical conductor, the plurality of batteries, the first electrical conductor being plug-fit within the first apertures of the plurality of batteries and electrically connected to the plurality of batteries, the second electrical conductor being plug-fit within the second apertures of the plurality of batteries and electrically connected to the plurality of batteries.

In some embodiments, one of the wall of the first hole and the peripheral wall of the first electrical conductor is provided with at least one first groove, the other of which is provided with at least one first protrusion, the first protrusion being a guide fit within the first groove;

and/or one of the hole wall of the second hole and the outer peripheral wall of the second electric conductor is provided with at least one second groove, and the other is provided with at least one second convex part, and the second convex part is in guide fit with the second groove.

Drawings

Fig. 1 is an exploded view of a battery according to an embodiment of the present utility model.

Fig. 2 is a schematic view of the housing of fig. 1.

Fig. 3 is an exploded view of a battery pack according to an embodiment of the present utility model.

Reference numerals:

a battery case 1; a housing 11; a slot 111; a mounting hole 112; a first hole 113; a first groove 1131; a second aperture 114; a second slot 1141; a cover 12;

a core pack 2;

an electric conductor 3; a first conductor 31; a first protruding portion 311; a second conductor 32; and a second protrusion 321.

Detailed Description

Reference will now be made in detail to embodiments of the present utility model, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

As shown in fig. 1, the battery of the embodiment of the present utility model includes a battery case 1, a positive connector (not shown), a negative connector (not shown), and a core pack 2.

The battery case 1 is provided with a slot 111, a first hole 113, and a second hole 114, each of the first hole 113 and the second hole 114 being for insertion of the electrical conductor 3. For example, the battery case 1 may be provided separately and include a case 11 and a cover 12, the slot 111 may be provided in the case 11, and a notch of the slot 111 may be provided at an upper side of the case 11. The cover 12 can be mounted and fixed on the housing 11, and the cover 12 can seal the notch of the slot 111, thereby sealing the battery case 1.

As shown in fig. 2, the first hole 113 and the second hole 114 may be provided in the housing 11, and the first hole 113 and the second hole 114 may penetrate the housing 11 in a thickness direction (front-rear direction) of the housing 11. In use, as shown in fig. 1, the first hole 113 and the second hole 114 can be penetrated by the electric conductor 3, and the material of the electric conductor 3 can be a metal conductor, so that the electric connection between the battery and the electric conductor 3 can be realized.

A positive connector and a negative connector are provided to the battery case 1, the positive connector being connected between the first hole 113 and the slot 111, and the negative connector being connected between the second hole 114 and the slot 111. For example, the positive connector and the negative connector may each include a tab, a post, and the like, and may be fixed in the housing 11, wherein one end of the positive connector may extend into the slot wall of the slot 111 or the slot 111, and the other end of the positive connector may extend into the hole wall of the first hole 113 or the first hole 113; one end of the negative connector may extend into the slot wall of the slot 111 or into the slot 111, and the other end of the negative connector may extend into the wall of the second hole 114 or into the second hole 114.

Both the positive connector and the negative connector may be electrically conductive structures, wherein the positive connector meets the use requirement of electrical conduction between the socket 111 and the first hole 113 and the negative connector meets the use requirement of electrical conduction between the socket 111 and the second hole 114.

The core pack 2 comprises a positive tab and a negative tab, the core pack 2 is inserted and matched in the slot 111, the positive tab is electrically connected with the positive connector, and the negative tab is electrically connected with the negative connector. Specifically, the core pack 2 may be a lithium battery cell, but may be other types of battery cells, and the core pack 2 may be a stacked core, a rolled core, or the like. After the core pack 2 is processed and molded, the positive electrode lug and the negative electrode lug which extend to the outer side are arranged, when the core pack 2 is inserted and assembled in the slot 111 by the notch of the slot 111, the positive electrode lug on the core pack 2 can be in abutting contact with the positive connector which extends into the slot 111, and the negative electrode lug on the core pack 2 can be in abutting contact with the negative connector which extends into the slot 111.

When the battery pack is used, one conductor 3 can be inserted into each of the first hole 113 and the second hole 114, so that the battery pack 2 can be electrically connected with the corresponding conductor 3, and when the two conductors 3 are inserted into the first holes 113 and the second holes 114 of a plurality of battery cells, the series connection or the parallel connection of a plurality of batteries can be realized.

According to the battery provided by the embodiment of the utility model, the first hole 113 and the second hole 114 are formed in the battery, and when the battery is used, the conductors 3 are respectively inserted and assembled in the first holes 113 and the second holes 114 of the plurality of batteries, so that the plurality of batteries can be connected in series or in parallel, and the problems of complex welding process, time and labor waste, low production efficiency and the like when the bus bars are adopted for series-parallel connection in the related technology are avoided.

Secondly, the detachable design of the battery and the conductor 3 is realized by the plugging assembly mode, namely, when a fault occurs, the conductor 3 can be pulled out, and then the local core pack 2 with the fault is replaced, so that the condition that the whole power battery needs to be replaced in the prior art is avoided, and the maintenance and use cost is reduced.

In some embodiments, the battery case 1 has a length direction, the first hole 113, the second hole 114, and the insertion grooves 111 are spaced apart in the length direction, and the insertion grooves 111 are located between the first hole 113 and the second hole 114.

For example, as shown in fig. 2, the case 11 of the battery case 1 may be substantially rectangular parallelepiped, the length direction of the case 11 may be left-right direction, and the first hole 113, the insertion groove 111, and the second hole 114 may be sequentially arranged in the left-right direction. Therefore, on one hand, the battery can be made into a blade battery, so that the use safety of the battery can be improved, and on the other hand, the core pack 2 can be positioned between the first hole 113 and the second hole 114, namely, the core pack 2 can be clamped between the positive connector and the negative connector, the stability of the electric contact of the core pack 2 can be ensured by the clamping effect, and the assembly compactness can be improved.

It will be appreciated that in other embodiments, the first and second apertures 113, 114 may be provided on the same side of the slot 111, e.g., the first and second apertures 113, 114 may each be provided on the left or right side of the slot 111, etc. In other embodiments, the first hole 113 may be provided at the lower side of the slot 111, the second hole 114 may be provided at the left side or the right side of the slot 111, etc.

In some embodiments, the positive connector includes a first elastic portion, at least a portion of which extends into the slot 111, and the first elastic portion is configured to elastically contact the positive tab to achieve an electrical connection.

For example, the first elastic portion may be a metal spring, the first elastic portion may be embedded in the housing 11, and a portion of the first elastic portion may extend into the slot 111. When the core pack 2 is inserted into the slot 111, the positive tab on the core pack 2 can be in abutting contact with the first elastic portion, so that electrical connection between the core pack 2 and the positive connector can be achieved. The elastic stop of the first elastic part can ensure the stability and the effectiveness of connection.

In some embodiments, the negative connector includes a second resilient portion, at least a portion of which extends into the slot 111, and the second resilient portion is configured to resiliently contact the negative ear to make electrical connection.

For example, the second elastic portion may be a metal spring, and the second elastic portion may be embedded in the housing 11, and a portion of the second elastic portion may extend into the slot 111. When the core pack 2 is inserted into the slot 111, the negative electrode tab on the core pack 2 can be brought into abutting contact with the second elastic portion, so that electrical connection between the core pack 2 and the negative connector can be achieved. And the stability and the effectiveness of the connection can be ensured by utilizing the elastic stop of the second elastic part.

It should be noted that the first elastic portion and the second elastic portion may be substantially symmetrically arranged, where the first elastic portion may apply a rightward elastic force to the core pack 2, and the second elastic portion may apply a leftward elastic force to the core pack 2, and by means of elastic clamping of the first elastic portion and the second elastic portion, stability of electrical connection and compactness of assembly of the core pack 2 may be ensured.

In some embodiments, the positive connector comprises a first rolling member, at least part of which extends into the first bore 113, the first rolling member being adapted to be in rolling contact with the electrical conductor 3, and the negative connector comprises a second rolling member, at least part of which extends into the second bore 114, the second rolling member being adapted to be in rolling contact with the electrical conductor 3.

For example, the first rolling member may be a ball, the first rolling member may be embedded in the housing 11, one side of the first rolling member may extend into the first hole 113, the other side of the first rolling member may contact and electrically connect with other parts of the positive connector, and the first rolling member may freely roll with respect to the housing 11.

When the conductor 3 is inserted into the first hole 113, the first rolling member can realize rolling friction contact between the conductor 3 and the positive connector, so that the conductive use requirement is met, and the friction effect is reduced, so that the conductor 3 is convenient to insert.

Similarly, the second rolling member may be a ball, and may be embedded in the housing 11, one side of the second rolling member may extend into the second hole 114, the other side of the second rolling member may contact and electrically connect with other parts of the negative connector, and the second rolling member may freely roll relative to the housing 11.

When the conductor 3 is inserted into the second hole 114, the second rolling member can realize rolling friction contact between the conductor 3 and the negative connector, thereby satisfying the use requirement of conduction on the one hand, and reducing friction on the other hand, thereby facilitating the insertion of the conductor 3.

Alternatively, the positive connector includes a positive post to which the first rolling member is rolling fitted, for example, the first rolling member may be embedded in the positive post, and a portion may be exposed from the surface of the positive post. Similarly, the negative connector comprises a negative post to which the second rolling member is rolling fitted, i.e. the second rolling member may be embedded in the negative post.

It should be noted that, the positive electrode post and the negative electrode post may be both fixed in the housing 11, where the positive electrode post may be connected to the first elastic portion, and the negative electrode post may also be connected to the second elastic portion.

In some embodiments, the battery case 1 is provided with a plurality of mounting holes 112, and the mounting holes 112 are used to fix the connection members to achieve connection fixation of the two battery cases 1. For example, as shown in fig. 1 and 2, two mounting holes 112 may be provided, and two mounting holes 112 may be provided at the top side of the housing 11, one of the mounting holes 112 may be located at the left side of the housing 11, and the other mounting hole 112 may be located at the right side of the housing 11.

The connecting piece can be connecting plate etc., and the mounting hole 112 can be the screw hole, and during the installation, the mounting hole 112 can supply the fastener screw in, and the fastener can pass the connecting piece, can connect fixed with two different batteries by the connecting piece.

In some embodiments, the battery case 1 has magnetism so that a plurality of battery cases 1 may be connected and fixed by means of magnetic attraction. For example, the front side wall and the rear side wall of the battery case 1 can be formed by processing a magnet material, when a plurality of batteries are stacked and arranged along the front-rear direction, the battery cases 1 of two adjacent batteries can be connected and fixed in a magnetic manner, so that the structural stability of the assembled batteries can be improved, and secondly, the batteries can be detached in the magnetic manner, thereby facilitating overhaul and maintenance and reducing maintenance cost.

The battery pack of the embodiment of the present utility model is described below.

The battery pack according to the embodiment of the present utility model includes the battery, which may be the battery described in any of the above embodiments, and as shown in fig. 3, the battery may be provided in plurality, and a plurality of batteries may be stacked in the front-rear direction. The battery pack further comprises two electric conductors 3, wherein the two electric conductors 3 are respectively a first electric conductor 31 and a second electric conductor 32, the first electric conductor 31 is in plug fit in a first hole 113 of the plurality of batteries and is electrically connected with the plurality of batteries, and the second electric conductor 32 is in plug fit in a second hole 114 of the plurality of batteries and is electrically connected with the plurality of batteries.

In other embodiments, the first electrical conductor 31 may also pass through the first hole 113 of the partial cell and the second hole 114 of the partial cell, and correspondingly, the first electrical conductor 31 may also pass through the first hole 113 of the partial cell and the second hole 114 of the partial cell. Thus, the serial-parallel connection adjustment of a plurality of batteries can be realized according to the requirement.

In some embodiments, one of the wall of the first hole 113 and the outer peripheral wall of the first electrical conductor 31 is provided with at least one first groove 1131, and the other is provided with at least one first protrusion 311, the first protrusion 311 being guide-fitted into the first groove 1131.

For example, as shown in fig. 2, three first grooves 1131 may be provided on the wall of the first hole 113, the three first grooves 1131 may be arranged at intervals along the circumferential direction of the first hole 113, and each first groove 1131 may be arranged to extend in the front-rear direction and penetrate the battery case 1. As shown in fig. 3, the outer peripheral side of the first conductive body 31 may be provided with three first protruding portions 311, the three first protruding portions 311 may be arranged at intervals along the circumferential direction of the first conductive body 31, and each of the first protruding portions 311 may be elongated and extend in the front-rear direction.

When the first electric conductor 31 is assembled, the first protruding portions 311 on the first electric conductor 31 can be correspondingly inserted and matched in the first grooves 1131, and the guiding effect of the first electric conductor 31 and the first holes 113 can be enhanced by the limit matching of the first protruding portions 311 and the first grooves 1131, so that the anti-rotation effect can be achieved.

Similarly, one of the wall of the second hole 114 and the outer peripheral wall of the second electric conductor 32 is provided with at least one second groove 1141, and the other is provided with at least one second protrusion 321, the second protrusion 321 being guided to fit in the second groove 1141.

For example, as shown in fig. 2, three second grooves 1141 may be provided on the wall of the second hole 114, the three second grooves 1141 may be arranged at intervals along the circumferential direction of the second hole 114, and each second groove 1141 may be arranged to extend in the front-rear direction and penetrate the battery case 1. As shown in fig. 3, the outer peripheral side of the second conductive body 32 may be provided with three second convex portions 321, the three second convex portions 321 may be arranged at intervals along the circumferential direction of the second conductive body 32, and each second convex portion 321 may be elongated and extend in the front-rear direction.

When the second electric conductor 32 is assembled, the plurality of second convex parts 321 on the second electric conductor 32 can be correspondingly inserted and matched in the plurality of second grooves 1141, and the guiding effect of the second electric conductor 32 and the second holes 114 can be enhanced by the limit matching of the second convex parts 321 and the second grooves 1141, so that the anti-rotation effect can be also achieved.

While the above embodiments have been shown and described, it should be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives, and variations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the utility model.

Claims

1. A battery, comprising:

2. The battery of claim 1, wherein the battery case has a length direction, the first hole, the second hole, the slot are spaced apart in the length direction, and the slot is located between the first hole and the second hole.

3. The battery of claim 1, wherein the positive connector includes a first resilient portion, at least a portion of the first resilient portion extending into the slot, and the first resilient portion is configured to resiliently contact the positive tab to make electrical connection;

4. The battery of claim 1, wherein the positive connector includes a first rolling element, at least a portion of the first rolling element extending into the first bore, the first rolling element for rolling contact with the electrical conductor;

5. The battery of claim 4, wherein the positive connector comprises a positive post to which the first rolling member is rolling fitted;

6. The battery according to claim 1, wherein the battery case is provided with a plurality of mounting holes for fixing a connecting member to achieve connection fixation of the two battery cases.

7. The battery according to any one of claims 1 to 6, wherein the battery case has magnetism so that a plurality of the battery cases can be connected and fixed by means of magnetic attraction;

8. A battery pack comprising a battery as claimed in any one of claims 1 to 7.

9. The battery pack of claim 8, comprising an electrical conductor comprising a first electrical conductor and a second electrical conductor, the plurality of batteries, the first electrical conductor being plug-fit within the first apertures of the plurality of batteries and electrically connected to the plurality of batteries, the second electrical conductor being plug-fit within the second apertures of the plurality of batteries and electrically connected to the plurality of batteries.

10. The battery pack according to claim 9, wherein one of a wall of the first hole and an outer peripheral wall of the first electric conductor is provided with at least one first groove, and the other is provided with at least one first protrusion, the first protrusion being guide-fitted into the first groove;