CN212907887U

CN212907887U - Battery module, battery module and electrical equipment

Info

Publication number: CN212907887U
Application number: CN202020783846.8U
Authority: CN
Inventors: 尹相柱; 郭会生; 曾清平
Original assignee: Huizhou Xinminghai Technology Co ltd
Current assignee: Huizhou Xinminghai Technology Co ltd
Priority date: 2020-05-12
Filing date: 2020-05-12
Publication date: 2021-04-06
Anticipated expiration: 2030-05-12

Abstract

The embodiment of the utility model provides a relate to new forms of energy technical field, in particular to battery module, battery module and electrical equipment, battery module includes: an insulating support provided with a battery jar; the battery pack is accommodated in the battery groove; the first conducting bar is welded and fixed with the positive lug of the battery pack; and the second conducting bar is welded and fixed with the negative electrode lug of the battery pack. In this way, the embodiment of the utility model provides a can avoid battery tab to lead to the fact the increase of battery tab internal resistance because of the screw is not hard up, cause the condition of influence to battery safety in utilization.

Description

Battery module, battery module and electrical equipment

Technical Field

The embodiment of the utility model provides a relate to new forms of energy technical field, especially relate to a battery module, battery module and electrical equipment.

Background

In recent years, with the gradual depletion of global consumption energy and the growing tension of greenhouse effect situation, new energy is favored by various countries, and the application of electric energy as clean and pollution-free high-efficiency energy, especially lithium batteries, is greatly developed.

However, the inventor of the utility model finds that the traditional battery module fixing and mounting mode is that the bolt directly contacts the battery pack tab and locks and fixes the battery pack tab, but the battery easily appears the increase of the tab internal resistance that the tab stress deformation that the screw becomes flexible and the screw becomes flexible back tab free activity causes in the service environment of difference, leads to the battery local temperature rise under operating condition, makes battery in use have the phenomenon of great potential safety hazard.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a main technical problem who solves provides a battery module, can avoid battery tab to lead to the fact battery tab internal resistance increase because of the screw is not hard up, leads to the fact the condition of influence to battery safety in utilization.

In order to solve the technical problem, the utility model discloses a technical scheme be: the battery module comprises an insulating bracket, a battery groove and a battery cover, wherein the insulating bracket is provided with the battery groove; a battery pack accommodated in the battery slot; the first conducting bar is welded and fixed with the positive lug of the battery pack; and the second conducting bar is welded and fixed with the negative electrode lug of the battery pack.

Optionally, first electrically conductive row includes first joint portion and first weld part, first joint portion is provided with first curved groove, first curved groove joint in the lateral wall of battery jar, first weld part with first joint portion is connected, and first weld part in the tank bottom of battery jar, first weld part with the anodal ear welding of battery package.

Optionally, the battery module further comprises a first screw; the lateral wall of battery jar is provided with first screw, first joint portion is provided with first through-hole, first screw pass behind the first through-hole spiro union in first screw.

Optionally, the second conducting bar comprises a second clamping portion and a second welding portion, the second clamping portion is provided with a second curved groove, the second curved groove is clamped on the side wall of the battery jar, the second welding portion is connected with the second clamping portion, the second welding portion is attached to the bottom of the battery jar, and the second welding portion is welded with the negative electrode lug of the battery pack.

Optionally, the battery module further includes a second screw, a second screw hole is formed in a side wall of the battery jar, a second through hole is formed in the second clamping portion, and the second screw penetrates through the second through hole and then is screwed to the second screw hole.

A battery module comprises an upper pressing plate, a lower pressing plate, a fixing device, a serial connection device and any one of the battery modules; the battery modules are stacked and positioned between the upper pressing plate and the lower pressing plate, the upper pressing plate and the lower pressing plate are fixed by the fixing device, and the serial connection device is respectively connected with the first conductive bars and the second conductive bars of the battery modules so as to connect the battery modules in series.

Optionally, the plurality of battery modules are arranged in at least two rows of battery rows arranged side by side; the series connection connecting device comprises a plurality of rigid conducting strips and flexible conducting strips, wherein the rigid conducting strips are respectively connected with two adjacent battery modules in the same row in series, and the flexible conducting strips are connected with two rows of battery rows in series.

Optionally, the rigid conductive sheet is a rigid copper sheet.

Optionally, the fixing device includes a first bolt, a first fixing hole disposed on the upper pressure plate, a second fixing hole disposed on the battery module, and a threaded hole disposed on the lower pressure plate; the first bolt penetrates through the first fixing hole and the second fixing hole in sequence and then is in threaded connection with the threaded hole.

An electrical apparatus comprising the battery module according to any one of the above.

The embodiment of the utility model provides an in, through the mode of replacing the utmost point ear of battery package with the positive negative pole welded fastening's of the electrically conductive row of first electrically conductive row and second mode for the fix with screw, effectively avoided the not hard up battery utmost point ear internal resistance that causes of screw to increase, thereby lead to the battery to rise at operating condition temperature and lead to the fact the battery to have the condition of potential safety hazard.

Drawings

Fig. 1 is an overall schematic view of a battery module according to an embodiment of the present invention;

fig. 2 is an exploded view of a battery module according to an embodiment of the present invention;

fig. 3 is a schematic view of an insulating support of a battery module according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a first and second conductive bar of a battery module according to an embodiment of the present invention;

fig. 5 is an overall schematic view of a battery module according to an embodiment of the present invention;

fig. 6 is an exploded view of a battery module according to an embodiment of the present invention;

fig. 7 is a schematic view of a series connection device for battery modules according to an embodiment of the present invention;

fig. 8 is a schematic diagram of a rigid conductive sheet of a series connection device for battery modules according to an embodiment of the present invention;

fig. 9 is a schematic view of a flexible conductive sheet of a series connection device for battery modules according to an embodiment of the present invention;

fig. 10 is a schematic view of a first fixing hole of a battery module fixing device according to an embodiment of the present invention;

fig. 11 is a schematic view of a second fixing hole of the battery module fixing device according to the embodiment of the present invention;

fig. 12 is a schematic view of a threaded hole of a battery module fixing device according to an embodiment of the present invention;

fig. 13 is a schematic view of a first bolt of a battery module fixing device according to an embodiment of the present invention.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described in more detail with reference to the accompanying drawings and specific embodiments. It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for descriptive purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 and 2, a battery module 10 includes an insulating support 101, a battery pack 102, a first conductive bar 103, a second conductive bar 104, a first screw 105, and a second screw 106. The battery pack 102 is disposed in the insulating support 101, the first conductive bar 103 is disposed on the insulating support 101 and connected to a positive tab of the battery pack 102, the second conductive bar 104 is disposed on the insulating support 101 and connected to a negative tab of the battery pack 102, the first screw 105 fixes the first conductive bar 103 to the insulating support 101, and the second screw 106 fixes the second conductive bar 104 to the insulating support 101.

Referring to fig. 3, the insulating bracket 101 is provided with a battery case 1011, a first screw hole 1012 and a second screw hole 1013. The battery slot 1011 is disposed in the middle of the insulating bracket 101, and the battery slot 1011 is used for placing the battery pack 102. The first screw hole 1012 is disposed at one end of the sidewall of the battery case 1011, the second screw hole 1013 is disposed at the other end of the sidewall of the battery case 1011, and the first screw hole 1012 and the second screw hole 1013 are used to cooperate with the first screw 105 and the second screw 106 to fix the first conductive bar 103 and the second conductive bar 104.

As for the first conductive bar 103, the first conductive bar 103 includes a first clamping portion 1031 and a first welding portion 1032. The first clamping part 1031 is provided with a first curved slot 10311, the width of the first curved slot 10311 is matched with the width of the side wall of the battery slot 1011, and the first curved slot 10311 is clamped on the side wall of the battery slot 1011. The first welding part 1032 is connected with the first clamping part 1031, the first welding part 1032 is attached to the bottom of the battery groove 1011, and the first welding part 1032 is welded with the positive lug of the battery pack 102, so that the positive lug of the battery pack 102 is attached to the first welding part 1032 in a surface-to-surface manner and is welded and connected, and the positive lug of the battery pack 102 is not easily loosened and deformed to cause the deformation of the positive lug and increase the internal resistance of the lug.

For the second conductive bar 104, the second conductive bar 104 includes a second clamping portion 1041 and a second welding portion 1042. The second clamping portion 1041 is provided with a second curved slot 10411, the width of the second curved slot 10411 is matched with the width of the side wall of the battery slot 1011, and the second curved slot 10411 is clamped to the side wall of the battery slot 1011. The second welding portion 1042 is connected to the second clamping portion 1041, the second welding portion 1042 is attached to the bottom of the battery groove 1011, and the second welding portion 1042 is welded to the negative electrode tab of the battery pack 102, so that the negative electrode tab of the battery pack 102 is attached to the surface of the second welding portion 1042 and welded to the surface of the second welding portion 1042, and the negative electrode tab is not easily loosened and deformed to increase the internal resistance of the electrode tab due to deformation of the negative electrode tab of the battery pack 102.

Further, the first conductive bar 103 is provided with a first through hole 1033, and the second conductive bar 104 is provided with a second through hole 1043. The first clamping portion 1031 is clamped on the side wall of the battery jar 1011, the first through hole 1033 corresponds to the first screw hole 1012, the second clamping portion 1041 is clamped on the side wall of the battery jar 1011, and the second through hole 1043 corresponds to the second screw hole 1013.

As for the first screw 105 and the second screw, the first screw 105 is screwed to the first screw hole 1012 through the first through hole 1033, thereby fixing the first conductive bar 103 to the insulating holder 101. The second screw 106, the second screw 106 passing through the second through hole 1043 and being screwed into the second screw hole 1013, thereby fixing the second conductive bar 104 to the insulating support 101. So far, the first conducting bar 103 and the second conducting bar 104 are completely fixed on the insulating support 101, and the first conducting bar 103 and the second conducting bar 104 are respectively welded with the positive tab and the negative tab of the battery pack 102, so that tab internal resistance increase caused by deformation of the battery tab due to screw looseness or stress on the tab of the battery is avoided, and finally hidden danger in use safety of the battery is caused.

Referring to fig. 5 and 6, a battery module 1 includes an upper plate 20, a lower plate 30, a fixing device 40, a series connection device 50, and a plurality of battery modules 10.

The battery modules 10 are stacked and divided into two left and right groups. The upper pressing plate 20 is disposed at one end surface of the stacked battery modules 10, the lower pressing plate 30 is disposed at the other end surface of the stacked battery modules 10, the fixing device 40 fixes the upper pressing plate 20 and the lower pressing plate 30, and the series connection device 50 is respectively connected to the first conductive bars 103 and the second conductive bars 104 of the two uppermost or two lowermost battery modules 10 of the stacked battery modules 10, so as to implement the series connection of the stacked battery modules 10.

Specifically, the battery modules between two adjacent layers of the left and right two sets of stacked battery modules 10 are oppositely disposed such that the positive electrode of the battery module 10 of the upper layer corresponds to the negative electrode of the battery module 10 of the lower layer.

Referring to fig. 7 to 9, the series connection apparatus 50 includes a plurality of rigid conductive sheets 501 and a plurality of flexible conductive sheets 502. The rigid conductive sheet 501 is provided with a first gap 5011 and a second gap 5012. The rigid conductive sheet 501 is attached to the first conductive bar 103 and the second conductive bar 104 of the two adjacent upper and lower battery modules 10 of the same row of battery modules 10, and the first gap 5011 and the second gap 5012 correspond to the first through hole 1033 and the second through hole 1043 of the two adjacent upper and lower battery modules 10, respectively, and the rigid conductive sheet 501 is locked by screws. Thereby, the positive electrodes of the upper and lower battery modules 10 are connected to the negative electrode, and the upper and lower battery modules 10 are connected in series. The flexible conductive sheet 502 is provided with a first connecting hole 5021 and a second connecting hole 5022, the flexible conductive sheet 502 is disposed on the inner sides of the two rows of battery modules 10 adjacent to each other, the left side of the flexible conductive sheet 502 is attached to the left side of the second conductive bar 104 of the battery modules 10, the right side of the flexible conductive sheet 502 is attached to the right side of the first conductive bar 103 of the battery modules 10, the first connecting hole 5021 is correspondingly disposed on the second through hole 1043 located on one side of the bottom surface or the top surface of the one row of battery modules 10 on the left side, and the second connecting hole 5022 is correspondingly disposed on the first through hole 1033 located on one side of the bottom surface or the top surface of the one row of battery. At this time, the left side of the flexible conductive sheet 502 is connected to the negative electrode of the battery module 10, the right side of the flexible conductive sheet 502 is connected to the positive electrode of the battery module 10, and the flexible conductive sheet 502 is fixed by screw locking. So far, the battery modules 10 in the row on the left side are communicated with the battery modules 10 in the row on the right side through the soft conducting strips 502, so that the battery modules 10 in the left row and the right row are connected in series, and the rigid conducting strips 501 are connected in series between the upper battery module 10 and the lower battery module 10 adjacent to the battery module 10 in the same row, so that the circuit series connection of the whole battery module 1 is realized.

In some embodiments, the number of the battery modules 10 can be increased or decreased according to actual needs to change the power of the battery module 1, so as to meet different requirements of different scenes.

In other embodiments, the rigid conductive sheet 501 is a rigid copper sheet.

Referring to fig. 10 to 13, the fixing device 40 includes a first fixing hole 401, a second fixing hole 402, a threaded hole 403, and a first bolt 404. The first fixing holes 401 are formed in the upper plate 20, the second fixing holes 402 are formed in the battery module 10, and the screw holes 403 are formed in the lower plate 30. The first bolt 404 is screwed with the screw hole 403 after passing through the first fixing hole 401 and the second fixing hole 402 in sequence, thereby fixing the stacked battery modules 10.

An electrical apparatus comprising the battery module 1 described in any one of the above.

It should be noted that the preferred embodiments of the present invention are described in the specification and the drawings, but the present invention can be realized in many different forms, and is not limited to the embodiments described in the specification, and these embodiments are not provided as additional limitations to the present invention, and are provided for the purpose of making the understanding of the disclosure of the present invention more thorough and complete. Moreover, the above technical features are combined with each other to form various embodiments which are not listed above, and all the embodiments are regarded as the scope of the present invention; further, modifications and variations will occur to those skilled in the art in light of the foregoing description, and it is intended to cover all such modifications and variations as fall within the true spirit and scope of the invention as defined by the appended claims.

Claims

1. A battery module, comprising:

an insulating support provided with a battery jar;

the battery pack is accommodated in the battery groove;

the first conducting bar is welded and fixed with the positive lug of the battery pack;

and the second conducting bar is welded and fixed with the negative electrode lug of the battery pack.

2. The battery module according to claim 1, wherein the first conductive bar comprises a first clamping portion and a first welding portion, the first clamping portion is provided with a first curved groove, the first curved groove is clamped on the side wall of the battery jar, the first welding portion is connected with the first clamping portion, the first welding portion is attached to the bottom of the battery jar, and the first welding portion is welded to a positive tab of the battery pack.

3. The battery module of claim 2, further comprising a first screw;

the lateral wall of battery jar is provided with first screw, first joint portion is provided with first through-hole, first screw pass behind the first through-hole spiro union in first screw.

4. The battery module according to claim 1, wherein the second conductive bar comprises a second clamping portion and a second welding portion, the second clamping portion is provided with a second curved groove, the second curved groove is clamped on the side wall of the battery jar, the second welding portion is connected with the second clamping portion, the second welding portion is attached to the bottom of the battery jar, and the second welding portion is welded to the negative tab of the battery pack.

5. The battery module of claim 4, further comprising a second screw;

the lateral wall of battery jar is provided with the second screw, second joint portion is provided with the second through-hole, the spiro union in behind the second screw passed the second through-hole in the second screw.

6. A battery module comprising an upper press plate, a lower press plate, a fixing means, a series connection means, and a plurality of battery modules according to any one of claims 1 to 5;

the battery modules are stacked and positioned between the upper pressing plate and the lower pressing plate, the upper pressing plate and the lower pressing plate are fixed by the fixing device, and the serial connection device is respectively connected with the first conductive bars and the second conductive bars of the battery modules so as to connect the battery modules in series.

7. The battery module as recited in claim 6 wherein the plurality of battery modules are arranged in at least two side-by-side rows of cells;

the series connection connecting device comprises a plurality of rigid conducting strips and flexible conducting strips, wherein the rigid conducting strips are respectively connected with two adjacent battery modules in the same row in series, and the flexible conducting strips are connected with two rows of battery rows in series.

8. The battery module of claim 7, wherein the rigid conductive tab is a rigid copper tab.

9. The battery module according to claim 6, wherein the fixing means comprises a first bolt, a first fixing hole provided to the upper plate, a second fixing hole provided to the battery module, and a screw hole provided to the lower plate;

the first bolt penetrates through the first fixing hole and the second fixing hole in sequence and then is in threaded connection with the threaded hole.

10. An electric device characterized by comprising the battery module according to any one of claims 6 to 9.