CN213278219U

CN213278219U - Welding-free battery module

Info

Publication number: CN213278219U
Application number: CN202022318084.7U
Authority: CN
Inventors: 赵德明; 任耀启; 卢勇; 谢东吴
Original assignee: Suzhou Key New Power Technology Co ltd
Current assignee: Suzhou Key New Power Technology Co ltd
Priority date: 2020-10-16
Filing date: 2020-10-16
Publication date: 2021-05-25
Anticipated expiration: 2030-10-16

Abstract

The utility model provides a welding-free battery module, which comprises a shell and a shell cover, wherein the shell comprises a plurality of accommodating areas, the accommodating areas are respectively used for installing batteries, the shell cover is connected with the shell so as to fix the batteries in the accommodating areas, and each accommodating area is internally provided with a conducting strip which is elastically and electrically connected with the corresponding battery; the shell comprises a first circuit board which is electrically connected with the plurality of conducting strips. The utility model discloses a plurality of conducting strips all can be mould spare, add the uniformity that can ensure the structure man-hour, and then ensure every battery contact resistance's uniformity, the utility model discloses an exempt from to weld battery module is connected through a plurality of independent conducting strips and first circuit board elasticity electricity, both guaranteed with the contact stability of battery, also can realize that inside each battery of battery module establishes ties, the series-parallel connection and to each battery temperature, the sampling of voltage, need not processes such as laser welding, reduced the processing cost.

Description

Welding-free battery module

Technical Field

The utility model relates to a battery module technical field particularly, relates to a exempt from to weld battery module.

Background

The battery automobile market drives the rapid development of the lithium battery industry, and the lithium battery equipment industry is well-behaved. The battery module welding is on the whole, and laser welding has more the advantage, and under the big condition of battery demand, laser welding's efficient, advantages such as yield make it more extensive in module welding application. However, for the battery pack having a large number of cylindrical cells, the welding cost by laser welding is high, and the battery recycling and the echelon utilization are not facilitated.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a welding-free battery module to solve the problem that the cost of the battery module in the prior art is too high due to laser welding.

In order to achieve the above object, the present invention provides a welding-free battery module, which comprises a housing and a housing cover, wherein the housing comprises a plurality of accommodating areas, the accommodating areas are respectively used for installing batteries, the housing cover is connected with the housing to fix the batteries in the accommodating areas, and each accommodating area is provided with a conductive sheet elastically and electrically connected with the corresponding battery; the shell comprises a first circuit board which is electrically connected with the plurality of conducting strips.

Furthermore, the welding-free battery module also comprises a second circuit board, the second circuit board is arranged on the first circuit board and is electrically connected with the first circuit board, and the second circuit board is used for power output.

Further, the first circuit board comprises a main body part, a plurality of conducting strips are arranged on the main body part, the conducting strips are arranged in pairs, and the battery is arranged between two conducting strips in each pair; the plurality of pairs of conductive sheets are arranged in one-to-one correspondence with the plurality of accommodation areas.

Further, the conducting strip includes fixed part and elastic component, and the fixed part welding is on the main part, is between fixed part and the elastic component and predetermines the angle setting, and the both ends of battery are located between two elastic components.

Further, one end of the elastic part, which is far away from the fixing part, is provided with a convex part, and the convex part protrudes towards the battery.

Furthermore, the welding-free battery module also comprises a plurality of spacing blocks, the spacing blocks are positioned between the two oppositely arranged conducting strips, the spacing blocks are arranged in the shell at intervals along the length direction of the shell, the spacing blocks extend along the width direction of the shell, and the accommodating area is formed between the two adjacent spacing blocks; or, the two sides of the fixing part are oppositely provided with a plurality of elastic sheets, the inner surfaces of the elastic sheets are matched with the side surfaces of the battery so as to clamp the battery, and the accommodating area is formed between the plurality of elastic sheets which are oppositely arranged.

Further, exempt from to weld battery module still includes a plurality of spacers, and the spacer is located between two relative conducting strips that set up, and a plurality of spacers set up in the casing along the length direction interval of casing, and the spacer extends along the width direction of casing, and the holding area forms between two adjacent spacers, and the both sides of fixed part are provided with a plurality of shell fragments relatively, the internal surface of shell fragment and the side surface looks adaptation of battery to the centre gripping battery.

Furthermore, two sides of the main body part are provided with first folded edges which are oppositely arranged, and the shell cover is covered outside the two first folded edges; the welding-free battery module shell also comprises an insulating plate, and the insulating plate is positioned between the first folding edge and the elastic part; one side of the insulating plate close to the inside of the accommodating area is provided with a positioning groove, and the elastic part is installed in the positioning groove.

Furthermore, a plurality of clamping grooves are arranged at intervals on the first folded edge, two second folded edges which are oppositely arranged are arranged on the shell cover, and a plurality of buckles are arranged on the second folded edges; under the condition that the shell cover is arranged on the shell, the two second flanges are located on the outer sides of the two first flanges in a one-to-one correspondence mode, and the plurality of buckles are matched with the plurality of clamping grooves in a one-to-one correspondence mode, so that the shell cover is connected onto the shell.

Further, the welding-free battery module further includes: the fireproof heat insulation layer is arranged between the battery and the shell cover; the first circuit board is an aluminum-based printed circuit board.

Use the technical scheme of the utility model, the utility model discloses a plurality of conducting strips all can be mould spare, add the uniformity that can ensure the structure man-hour, and then ensure every battery contact resistance's uniformity, the utility model discloses an exempt from to weld battery module is connected through a plurality of independent conducting strips and first circuit board elasticity electricity, both guaranteed with the contact stability of battery, also can realize that inside each battery of battery module establishes ties, the cluster is parallelly connected and to each battery temperature, the sampling of voltage, need not processes such as laser welding, reduced the processing cost.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 schematically shows an exploded view of an embodiment of a weld-free battery module of the present invention.

Wherein the figures include the following reference numerals:

1. a housing; 11. a first circuit board; 111. a first folded edge; 1111. a card slot; 1112. positioning holes; 112. a main body portion; 12. a conductive sheet; 121. a fixed part; 1211. a spring plate; 122. an elastic portion; 1221. a convex portion; 13. an insulating plate; 131. positioning a groove; 14. a spacer block; 15. a second circuit board; 2. a battery; 3. a shell cover; 31. buckling; 4. a fireproof heat-insulating layer.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As noted in the background, the battery automobile market has driven the rapid development of the lithium battery industry, and the lithium battery equipment industry has therefore also come to the favor of development. The battery module welding is on the whole, and laser welding has more the advantage, and under the big condition of battery demand, laser welding's efficient, advantages such as yield make it more extensive in module welding application. However, for the battery pack having a large number of cylindrical cells, the welding cost by laser welding is high, and the battery recycling and the echelon utilization are not facilitated.

In order to solve the above problem, referring to fig. 1, an embodiment of the present invention provides a welding-free battery module, where the welding-free battery module of this embodiment includes a housing 1 and a housing cover 3, the housing 1 includes a plurality of accommodating areas, the accommodating areas are respectively used for installing batteries 2, the housing cover 3 is connected to the housing 1 to fix the batteries 2 in the accommodating areas, and each accommodating area is provided with a conducting strip 12 elastically and electrically connected to a corresponding battery 2; the housing includes a first circuit board 11, and the first circuit board 11 is electrically connected to a plurality of conductive sheets 12. Wherein, the housing 1 has a main structure, the first circuit board 11 can be mounted on the main structure of the housing 1, and can also be a part of the main structure of the housing 1, in the embodiment where the first circuit board 11 is mounted on the main structure of the housing 1, the first circuit board 11 can be a PCB board or a flexible circuit board; in an embodiment in which the first circuit board 11 is part of the main structure constituting the case 1, the first circuit board 11 may be an aluminum-based circuit board. The utility model discloses a plurality of conducting strips 12 all can be mould spare, add the uniformity that can ensure the structure man-hour, and then ensure 2 contact resistance's of every battery uniformity, the utility model discloses an exempt from to weld battery module is connected through a plurality of independent conducting strips 12 and 11 elastic electricity of first circuit board, both guaranteed with battery 2's contact stability, also can realize that inside each battery of battery module establishes ties, the cluster is parallelly connected and to each battery temperature, the sampling of voltage, need not processes such as laser welding, reduced the processing cost.

In the prior art, the temperature and voltage information of a battery is generally acquired through an acquisition module, is output to a controller through wire connection, and is communicated with a whole vehicle through the controller. In order to realize power output and signal output to the outside, the welding-free battery module in the embodiment further includes a second circuit board 15, the second circuit board 15 is disposed on the first circuit board, the second circuit board 15 is electrically connected to the first circuit board 11, and the second circuit board 15 is used for power output. The second circuit board 15 converts the collected data acquired from the first circuit board into a CAN signal for output, and the CAN signal CAN be used as high-voltage output of the first circuit board. By adopting the scheme, the second circuit board 15 (from the controller) is arranged at one end of the first circuit board 11 (the collection module), the second circuit board 15 is arranged on the first circuit board 11 and is electrically connected with the first circuit board 11, and the second circuit board 15 is used as the slave controller, so that a large number of collection lines are omitted when temperature and voltage collection is carried out on each battery, and the quantity of collection points is not influenced by the structural space.

Specifically, the first circuit board 11 in the present embodiment includes a main body portion 112, a plurality of conductive sheets 12 are provided on the main body portion 112, the plurality of conductive sheets 12 are provided in pairs, and the battery 2 is mounted between the two conductive sheets 12 in each pair; a plurality of pairs of conductive plates 12 are provided in one-to-one correspondence with the plurality of accommodation areas. The main body 112 is provided with a printed circuit, each conductive sheet 12 is soldered on the first circuit board 11 and electrically connected with the printed circuit, and the series connection or series-parallel connection of each conductive sheet 12 is realized through the first circuit board 11. Wherein the two conducting strips 12 in each pair are respectively connected with the positive pole and the negative pole of the battery 2.

The conductive sheet 12 in this embodiment includes a fixing portion 121 and an elastic portion 122, the fixing portion 121 is welded on the main body 112, the fixing portion 121 and the elastic portion 122 are disposed at a predetermined angle, the angle is between 85 ° and 90 °, preferably 88 °, two ends of the battery 2 are disposed between the two elastic portions 122, the two elastic portions 122 are respectively connected to a positive electrode and a negative electrode of the battery 2, and can increase elastic pressure to the battery 2 to prevent a circuit between the battery 2 and the elastic portions 122 from being disconnected.

In order to further ensure the electrical connection between the conductive sheet 12 and the battery 2, the end of the elastic part 122 away from the fixing part 121 in the embodiment is provided with a protrusion 1221, the protrusion 1221 protrudes toward the battery 2, i.e., protrudes toward the inside of the corresponding accommodating area, and the protrusion abuts against the electrode of the battery 2, so as to ensure the electrical connection stability between the conductive sheet 12 and the battery 2.

The utility model discloses an in an embodiment, exempt from to weld battery module in this embodiment still includes a plurality of spacers 14, spacers 14 are located between two conducting strips 12 of relative setting, a plurality of spacers 14 set up in casing 1 along casing 1's length direction interval, spacers 14 extend along casing 1's width direction, spacers 14 and battery surface butt, it forms between two adjacent spacers 14 to hold the district, wherein, casing 1's length direction is unanimous with the direction of arranging of a plurality of batteries, casing 1's width direction is unanimous with battery 2's length direction. The plurality of batteries 2 are partitioned and positioned by the plurality of partitions 14 so as to stably operate in the receiving areas formed between the partitions 14, thereby ensuring the stability of power supply to each battery 2. In a preferred embodiment, the side of the spacer 14 close to the side corresponding to the battery 2 is a concave arc surface to better position the battery 2.

In another embodiment of the present invention, the two sides of the fixing portion 121 are provided with a plurality of elastic sheets 1211, the inner surface of the elastic sheet 1211 is adapted to the side surface of the battery 2 to clamp the battery 2, and the accommodating area is formed between the plurality of elastic sheets 1211 disposed oppositely. The two sides of the fixing portion 121 correspond to the two sides of the accommodating area, and the plurality of batteries 2 are separated and fixed by the plurality of elastic sheets 1211 disposed opposite to each other, so that the batteries stably operate in the accommodating area formed between the elastic sheets 1211 disposed opposite to each other, and the power supply stability of each battery 2 is ensured.

In another embodiment of the present invention, the welding-free battery module in this embodiment further includes a plurality of spacers 14, the spacers 14 are located between two conducting strips 12 that are oppositely disposed, the plurality of spacers 14 are disposed in the casing 1 along the length direction of the casing 1 at intervals, the spacers 14 extend along the width direction of the casing 1, the accommodating area is formed between two adjacent spacers 14, two sides of the fixing portion 121 are relatively provided with a plurality of elastic sheets 1211, and the inner surface of the elastic sheets 1211 is adapted to the side surface of the battery 2 to hold the battery 2. The longitudinal direction of the case 1 coincides with the arrangement direction of the plurality of cells 2, and the width direction of the case 1 coincides with the longitudinal direction of the cells 2. The plurality of batteries 2 are partitioned and positioned by the plurality of partitions 14 so as to stably operate in the receiving areas formed between the partitions 14, thereby ensuring the stability of power supply to each battery 2. On the basis, the present embodiment further provides a plurality of elastic sheets 1211 disposed opposite to each other, and the plurality of elastic sheets 1211 clamp the side surface of the battery 2, so that the battery 2 can be more stably fixed in the accommodating area.

The two sides of the main body 112 in this embodiment are provided with first folding edges 111 which are oppositely arranged, and the shell cover 3 is covered outside the two first folding edges 111; in order to prevent short circuit, the welding-free battery module case 1 further includes an insulating plate 13, the insulating plate 13 being located between the first folded edge 111 and the elastic part 122; a positioning groove 131 is formed at one side of the insulating plate 13 near the inside of the accommodating area, and the elastic part 122 is installed in the positioning groove 131. The positioning grooves 131 and the end face positioning of the spacer blocks 14 ensure the position consistency of the conducting strips, and furthermore, a plurality of positioning portions are arranged on the first folding edge, the plurality of positioning portions are arranged at intervals along the length direction of the first folding edge 111, a plurality of positioning holes 1112 are arranged on the insulating plate, the plurality of positioning holes and the plurality of positioning portions are matched in a one-to-one correspondence manner to position the insulating plate 13, and preferably, the insulating plate 13 is bonded with the first folding edge 111.

In order to stably connect the case cover 3 to the case 1, a plurality of slots 1111 are disposed at intervals on the first folded edge 111 in this embodiment, two second folded edges are disposed on the case cover 3, and a plurality of buckles 31 are disposed on the second folded edges; under the condition that the shell cover 3 covers the shell 1, the two second flanges are correspondingly located outside the two first flanges 111, and the plurality of buckles 31 are correspondingly matched with the plurality of clamping grooves 1111 one by one, so that the shell cover 3 is connected to the shell 1. Through the combined action of a plurality of draw-in grooves 1111 and a plurality of buckles 31 for can be connected steadily between first hem 111 and the second hem, and then make the shell cover 3 can connect on casing 1 steadily. The plurality of slots 1111 are disposed along the length direction of the first folding edge 111 at intervals.

The welding-free battery module in this embodiment further includes: the fireproof heat insulation layer 4 is arranged between the battery 2 and the shell cover 3, namely between the top of the accommodating area and the shell cover; by arranging the fireproof heat-insulating layer 4, the thermal runaway spreading among the battery modules can be effectively prevented, and the safety is improved; the first circuit board 11 is an aluminum-based printed circuit board, and is used as a circuit carrier and a structure carrier, so that connection and fixation of the circuit board and the structure are omitted. Of course, for better crowded tight battery, the interval is equipped with a plurality of logical grooves on the cap 3, leads to the width direction extension of groove edge cap, and every leads to the groove and is used for dodging and compresses tightly bellied fire prevention insulating layer behind the battery, is equipped with towards the bellied sand grip of battery between the adjacent logical groove, and the sand grip is located between the adjacent battery to better crowded tight battery.

From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:

the utility model discloses a plurality of conducting strips all can be mould spare, add the uniformity that can ensure the structure man-hour, and then ensure every battery contact resistance's uniformity, the utility model discloses an exempt from to weld battery module is connected through a plurality of independent conducting strips and first circuit board elasticity electricity, both guaranteed with the contact stability of battery, also can realize that inside each battery of battery module establishes ties, the series-parallel connection and to each battery temperature, the sampling of voltage, need not processes such as laser welding, reduced the processing cost.

It should be noted that the above detailed description is exemplary and is intended to provide further explanation of the disclosure. 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 application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein.

Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.

For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In the foregoing detailed description, reference is made to the accompanying drawings, which form a part hereof. In the drawings, like numerals typically identify like components, unless context dictates otherwise. The illustrated embodiments described in the detailed description, drawings, and claims are not meant to be limiting. Other embodiments may be utilized, and other changes may be made, without departing from the spirit or scope of the subject matter presented here. It will be readily understood that the aspects of the present disclosure, as generally described herein, and illustrated in the figures, can be arranged, substituted, combined, separated, and designed in a wide variety of different configurations, all of which are explicitly contemplated herein.

The present disclosure in accordance with certain embodiments described herein is not to be limited in scope by the specific aspects illustrated. As will be apparent to those skilled in the art, many modifications and variations are possible without departing from the spirit and scope of the disclosure. Functionally equivalent methods and apparatuses, in addition to those enumerated herein, will be apparent to those skilled in the art from the foregoing description, within the scope of the present disclosure. Such modifications and variations are intended to fall within the scope of the appended claims. The disclosure is to be limited only by the terms of the appended claims, along with the full scope of equivalents to which such claims are entitled. It is to be understood that this disclosure is not limited to particular methods, reagents, compounds, compositions or biological systems, which can, of course, vary. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A welding-free battery module is characterized by comprising a shell (1) and a shell cover (3), wherein the shell (1) comprises a plurality of accommodating areas, the accommodating areas are respectively used for installing batteries (2), the shell cover (3) is connected with the shell (1) so as to fix the batteries (2) in the accommodating areas, and each accommodating area is internally provided with a conducting strip (12) elastically and electrically connected with the corresponding battery (2);

the shell (1) comprises a first circuit board (11), and the first circuit board (11) is electrically connected with the conducting strips (12).

2. The soldering-free battery module according to claim 1, further comprising a second circuit board (15), the second circuit board (15) being disposed on the first circuit board (11) and electrically connected to the first circuit board (11), the second circuit board (15) being used for power output.

3. The soldering-free battery module according to claim 1, wherein the first circuit board (11) includes a main body portion (112), a plurality of the conductive sheets (12) are provided on the main body portion (112), the plurality of the conductive sheets (12) are provided in pairs, and the battery (2) is mounted between the two conductive sheets (12) in each pair; the pairs of conductive sheets (12) are arranged in one-to-one correspondence with the plurality of accommodation areas.

4. The welding-free battery module as claimed in claim 3, wherein the conductive sheet (12) comprises a fixing portion (121) and an elastic portion (122), the fixing portion (121) is welded to the main body portion (112), the fixing portion (121) and the elastic portion (122) are disposed at a predetermined angle, and two ends of the battery (2) are disposed between the two elastic portions (122).

5. The welding-free battery module as recited in claim 4, wherein an end of the elastic part (122) remote from the fixing part (121) is provided with a projection (1221), the projection (1221) projecting toward the battery (2).

6. The welding-free battery module as claimed in claim 4, further comprising a plurality of spacers (14), wherein the spacers (14) are located between two oppositely disposed conductive sheets (12), the spacers (14) are disposed at intervals in the housing (1) along the length direction of the housing (1), the spacers (14) extend along the width direction of the housing (1), the spacers (14) abut against the outer surface of the battery (2), and the receiving region is formed between two adjacent spacers (14); or, a plurality of elastic sheets (1211) are oppositely arranged on two sides of the fixing part (121), the inner surfaces of the elastic sheets (1211) are matched with the side surface of the battery (2) to clamp the battery (2), and the accommodating area is formed among the plurality of elastic sheets (1211) which are oppositely arranged.

7. The welding-free battery module as claimed in claim 4, further comprising a plurality of spacers (14), wherein the spacers (14) are located between the two oppositely disposed conductive sheets (12), the spacers (14) are disposed in the housing (1) at intervals along the length direction of the housing (1), the spacers (14) extend along the width direction of the housing (1), the receiving region is formed between the two adjacent spacers (14), a plurality of elastic sheets (1211) are disposed on two sides of the fixing portion (121) oppositely, and the inner surfaces of the elastic sheets (1211) are adapted to the side surfaces of the battery (2) to clamp the battery (2).

8. The welding-free battery module as claimed in claim 4, wherein the main body part (112) is provided with oppositely arranged first folded edges (111) at two sides, and the housing cover (3) is arranged outside the two first folded edges (111); the welding-free battery module shell (1) further comprises an insulating plate (13), wherein the insulating plate (13) is positioned between the first folding edge (111) and the elastic part (122); a positioning groove (131) is formed in one side, close to the containing area, of the insulating plate (13), and the elastic portion (122) is installed in the positioning groove (131).

9. The welding-free battery module as claimed in claim 8, wherein a plurality of clamping grooves (1111) are arranged at intervals on the first folding edge (111), two second folding edges are oppositely arranged on the housing cover (3), and a plurality of buckles (31) are arranged on the second folding edges; under the condition that the shell cover (3) is arranged on the shell (1) in a covering mode, the two second folded edges are located on the outer sides of the two first folded edges (111) in a one-to-one corresponding mode, and the plurality of buckles (31) are matched with the plurality of clamping grooves (1111) in a one-to-one corresponding mode, so that the shell cover (3) is connected onto the shell (1).

10. The welding-free battery module of claim 1, further comprising:

the fireproof heat insulation layer (4), the fireproof heat insulation layer (4) is arranged between the battery (2) and the shell cover (3); wherein the first circuit board (11) is an aluminum-based printed circuit board.