CN114284616A - Welding-free battery module - Google Patents
Welding-free battery module Download PDFInfo
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- CN114284616A CN114284616A CN202111671174.7A CN202111671174A CN114284616A CN 114284616 A CN114284616 A CN 114284616A CN 202111671174 A CN202111671174 A CN 202111671174A CN 114284616 A CN114284616 A CN 114284616A
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- battery
- battery module
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- 230000002093 peripheral effect Effects 0.000 claims abstract description 10
- 238000009434 installation Methods 0.000 claims abstract description 9
- 238000005452 bending Methods 0.000 claims description 12
- 210000004907 gland Anatomy 0.000 claims description 9
- 230000007704 transition Effects 0.000 claims description 4
- 239000010410 layer Substances 0.000 description 44
- 238000010586 diagram Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention discloses a welding-free battery module, which comprises a battery pack, a frame and a plastic bracket, wherein the battery pack is arranged on the frame; the plastic bracket is provided with a first conductive structure; the bottom plate of the frame is provided with a second conductive structure; the first conductive structure comprises a conductive ring and a first lead-out part; the second conductive structure comprises a second lead-out part which is provided with an elastic structure contacted with the electrode of the battery cell. The welding-free battery module is provided with a plastic support to fix the battery cell, the problem that the concentricity of two plastic supports is difficult to ensure in the prior art and the installation and the disassembly are difficult is effectively solved, the conducting ring is arranged in the installation hole, a plurality of convex parts protruding towards the peripheral circle of the battery cell shell are arranged on the conducting ring, the convex parts distributed along the circumference are in multipoint elastic contact with the peripheral circle of the battery cell shell, the double functions of conduction and fixation are realized, the support and the conduction of another electrode are realized through the elastic structure, the battery cell is easily kept in a vertical state through the elastic structure and the elastic abutting force of the plurality of convex parts, and the reliability is improved.
Description
Technical Field
The invention relates to the technical field of power batteries for electric vehicles, in particular to a welding-free battery module.
Background
With the wide application of electric vehicles, a large number of retired power batteries not only seriously pollute the environment, but also cause serious waste of energy and resources. The quality defects of the battery such as desoldering, penetration welding, overlarge heat affected zone, stress concentration and the like in the welding and grouping process seriously affect the secondary utilization of the battery, so that the utilization rate and the safety characteristic of the power battery used in a gradient manner are generally improved by a welding-free grouping technology in the prior art.
In the prior art, a welding-free grouped structure of a cylindrical lithium ion battery cell generally sequentially comprises an upper plastic support, a battery pack and a lower plastic support, wherein elastic busbars are respectively fixed on the upper plastic support and the lower plastic support, and the elastic busbars are elastically contacted with electrodes of the battery cell to realize the electric connection of a plurality of batteries; go up plastic support and insert down plastic support through several pillars and connect as an organic wholely, and the technology mode among the prior art can make the installation all very inconvenient with disassembling, specifically does:
1. due to factors such as processing and assembly errors, the concentricity of each battery mounting hole is difficult to ensure by the upper plastic support and the lower plastic support, so that the later-mounted upper plastic support is difficult to assemble;
2. there is the installation clearance between battery and last plastic support and the lower plastic support, and hardly concentric for the gesture of installing battery in last, lower plastic support is difficult to be vertical state, seriously influences the elastic contact effect of the electrode at battery both ends and elasticity busbar, and the reliability reduces.
Therefore, in view of the above technical problems, there is a need for a novel welding-free battery module.
Disclosure of Invention
The invention aims to provide a welding-free battery module which fixes a battery cell through a plastic support, solves the problems that the concentricity and the mounting and dismounting of two plastic supports are difficult to ensure in the prior art, realizes double functions of electric conduction and fixation in a multi-point elastic contact mode of a conducting ring and the battery cell, realizes the support and the electric conduction of a battery cell electrode by utilizing an elastic part so as to keep the vertical state of the battery cell and improve the reliability.
In order to achieve the above purpose, the invention provides the following technical scheme:
the welding-free battery module of the invention is characterized in that the battery module comprises:
a battery pack having at least one cell;
a frame formed with a receiving cavity therein; and
the plastic support is fixed in the accommodating cavity of the frame, is parallel to the bottom plate of the frame, is provided with mounting holes with the number consistent with that of the battery cells, and is mounted in the mounting holes;
the plastic bracket is provided with a first conductive structure;
a second conductive structure is arranged on the bottom plate of the frame;
the first conductive structure comprises a conductive ring and a first leading-out part electrically connected with the conductive ring, and the conductive ring is arranged in the mounting hole and is in contact with the peripheral surface of the battery cell;
the second conductive structure comprises a second lead-out part which is provided with an elastic structure contacted with the electrode of the battery cell.
Further, the frame includes:
the bottom plate;
the side plates are positioned at two ends of the bottom plate in the X direction and extend along the vertical direction;
the plastic support is fixedly connected with the inner wall of the side plate.
Further, the frame includes:
the frame is provided with a frame main body part, the frame main body part is positioned at one end of the bottom plate in the Y direction, and a circuit layer is arranged on the frame main body part;
the first leading-out part is electrically connected with the conducting ring and the circuit layer;
a second lead-out portion electrically connected to the circuit layer.
Further, the first lead-out portion includes:
a fixing body connected with the plastic bracket;
the connecting body is bent towards the inside of the mounting hole and is embedded into the mounting hole; and
a first lead-out body having one end connected to the fixing body and the other end extending in the extending direction of the frame main body and connected to the circuit layer;
all the conductive rings are electrically connected with the circuit layer through the first lead-out body of the first lead-out part.
Furthermore, a plurality of groups of battery packs are mounted on the plastic bracket along the X direction;
each group of the battery packs has one first lead-out portion extending in the Y direction;
the first lead-out portion includes:
a fixing body connected with the plastic bracket;
the connecting body is bent towards the inside of the mounting hole and is embedded into the mounting hole; and
the first leading-out body is formed at the end part of the fixed body close to one end of the frame main body part, is bent towards the circuit layer and is connected with the circuit layer;
the conductive rings of the same group are electrically connected with the circuit layer through the first lead-out bodies of the first lead-out portions of the group.
Further, the mounting hole is divided into an upper hole and a lower hole from top to bottom;
the inner diameter of the upper hole is larger than that of the lower hole, and a transition part of the upper hole and the lower hole is formed into a step surface;
the connecting body is annular and is embedded into the upper part of the upper hole;
the upper part of the conducting ring is in contact with the inner wall of the connecting body, and the lower end of the conducting ring is supported on the step surface;
the middle position of conducting ring has a plurality of projections towards inside convex, and the electricity core pass through the projection with conducting ring elastic connection.
Further, the number of the first lead-out parts is consistent with that of the battery cores;
the first lead-out part is integrated at the mounting hole, and the first lead-out part is provided with:
a connector extending into the mounting hole and contacting the conductive ring;
a fixing body connected with the plastic bracket; and
a first lead-out body extending in an extending direction of the frame main body portion and connected to the circuit layer;
the mounting hole includes:
the ring groove is matched with the conducting ring, and the groove is communicated with the ring groove and extends to the upper end of the mounting hole;
the conducting ring is embedded into the annular groove, and the connecting body is embedded into the groove.
Further, a first insulating layer is arranged on the upper surface of the second lead-out part, and a second insulating layer is arranged on the lower surface of the second lead-out part;
the first insulating layer and the elastic structure are provided with avoidance holes at positions matched with each other to avoid the elastic structure.
Further, the elastic structure includes:
one end of the connecting arm is connected with the second leading-out part, and the other end of the connecting arm extends towards the battery cell in an inclined mode; and
and the bending part is formed at one end of the connecting arm, which is close to the battery core.
Further, the top of the frame is provided with a gland;
an insulating layer is arranged between the gland and the battery pack.
In the technical scheme, the welding-free battery module provided by the invention has the following beneficial effects:
the welding-free battery module is only provided with one plastic support to fix the battery cell, the problem that the concentricity of two plastic supports is difficult to ensure in the prior art and the installation and the disassembly are difficult is effectively solved, in addition, the conducting ring is arranged in the installation hole, the conducting ring is provided with a plurality of convex parts protruding towards the peripheral circle of the battery cell shell, the convex parts distributed along the circumference are in multipoint elastic contact with the peripheral circle of the battery cell shell, the double functions of conduction and fixation are realized, the support and the conduction of another electrode are realized through the elastic structure, the battery cell is easily kept in a vertical state through the elastic structure and the elastic abutting force of the plurality of convex parts, and the reliability is improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.
Fig. 1 is a schematic structural diagram of a welding-free battery module according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a welding-free battery module according to a first embodiment of the present invention, with a battery core removed;
fig. 3 is a schematic structural diagram of a conductive ring of a welding-free battery module according to a first embodiment of the present invention;
fig. 4 is a schematic diagram of a conductive ring, a battery cell, and a mounting hole of a welding-free battery module according to a first embodiment of the present invention;
fig. 5 is a schematic structural diagram of a welding-free battery module according to a third embodiment of the present invention;
fig. 6 is a schematic view of a conductive ring and a first lead-out portion of a welding-free battery module according to a third embodiment of the present invention;
fig. 7 is an enlarged view of a conductive ring, a first lead-out portion, and a mounting hole of a welding-free battery module according to a third embodiment of the present invention;
fig. 8 is a schematic structural diagram of a welding-free battery module according to a second embodiment of the present invention;
fig. 9 is a schematic structural view of a second lead-out portion of a welding-free battery module according to a second embodiment of the present invention;
fig. 10 is an exploded view of a fitting structure of a gland, an insulating layer and a battery module according to a second embodiment of a welding-free battery module according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of an elastic structure of a welding-free battery module according to an embodiment of the present invention;
fig. 12 is a schematic diagram of an electrode of an elastic structure supporting cell of a welding-free battery module according to an embodiment of the present invention.
Description of reference numerals:
1. a frame; 2. a plastic support; 3. an electric core; 4. a first lead-out section; 5. a second lead-out section; 6. conducting rings; 7. an elastic structure; 8. an insulating layer; 9. a gland;
101. a base plate; 102. a side plate; 103. a frame main body portion;
201. an upper hole; 202. a lower hole; 203. a ring groove; 204. a groove;
401. a fixed body; 402. a first lead-out body; 403. a linker; 404. connecting holes;
501. a first insulating layer; 502. a second insulating layer; 503. a second lead-out body;
601. a protrusion;
701. a connecting arm; 702. a bending part.
Detailed Description
In order to make the technical solutions of the present invention better understood, those skilled in the art will now describe the present invention in further detail with reference to the accompanying drawings.
The exempt from to weld battery module of this embodiment, this battery module includes:
a battery pack having at least one cell 3;
a frame 1, wherein the interior of the frame 1 is formed into a containing cavity; and
the plastic support 2 is fixed in the accommodating cavity of the frame 1, the plastic support 2 is parallel to the bottom plate 101 of the frame 1, the plastic support 2 is provided with mounting holes with the same number as the number of the electric cores 3, and the electric cores 3 are mounted in the mounting holes;
the plastic bracket 2 is provided with a first conductive structure;
the bottom plate 101 of the frame 1 is provided with a second conductive structure;
the first conductive structure comprises a conductive ring 6 and a first lead-out part 4 electrically connected with the conductive ring 6, and the conductive ring 6 is arranged in the mounting hole and is in contact with the peripheral surface of the battery cell 3;
the second conductive structure includes a second lead-out portion 5, and the second lead-out portion 5 has an elastic structure 7 contacting the electrode of the battery cell 3.
Specifically, this embodiment discloses a exempt from to weld battery module, and it mainly includes frame 1, one and the plastic support 2 that links firmly with frame 1 and installs the group battery in frame 1 through plastic support 2. Wherein, set up the mounting hole on the plastic support 2, inlay through setting up the direction and the perpendicular mounting hole of bottom plate 101 of frame 1 and adorn electric core 3, can conveniently fix a position and keep electric core 3's position through a mounting hole. Meanwhile, a first conductive structure is designed on the plastic bracket 2, and a second conductive structure is designed on the bottom plate 101 of the frame 1. The electric connection of each battery cell is realized by utilizing the conductive structure.
Preferably, the frame 1 of the present embodiment includes:
a base plate 101;
the plastic bracket 2 is fixedly connected with the inner wall of the side plate 102.
In general, the frame 1 of the present embodiment may mainly include the bottom plate 101, the side plate 102, and the frame body 103, wherein the frame body 103 has a circuit layer, and the first lead-out portion 4 is electrically connected to the conductive ring 6 and the circuit layer; the second lead portion 5 is electrically connected to the circuit layer. The first lead-out portion 4 and the second lead-out portion 5 are used to electrically connect the circuit layers of the frame 1.
First embodiment, referring to fig. 1 to 4, a first embodiment of the first lead-out portion 4 of the present embodiment is:
the first lead-out portion 4 disclosed in the first embodiment includes:
a fixing body 401 connected to the plastic bracket 2;
a connecting body 403 bent toward the inside of the mounting hole and embedded in the mounting hole; and
a first lead-out body 402 having one end connected to the fixed body 401 and the other end extending in the extending direction of the frame main body 103 and connected to the circuit layer;
all the conductive rings 6 are electrically connected to the circuit layer through the first lead-out body 402 of the first lead-out portion 4.
The mounting hole of the first embodiment is divided into an upper hole 201 and a lower hole 202 from top to bottom;
the inner diameter of the upper hole 201 is larger than that of the lower hole 202, and a transition part between the upper hole 201 and the lower hole 202 is formed into a step surface;
the connector 403 has a circular ring shape, and the connector 403 is inserted into the upper portion of the upper hole 201;
the upper part of the conducting ring 6 is in contact with the inner wall of the connecting body 403, the lower end of the conducting ring 6 is supported on the step surface, the conducting ring 6 is an annular spring and is provided with a notch, when the conducting ring 6 is placed in the mounting hole, the notch is contracted, after the conducting ring 6 is placed in place, the conducting ring 6 is expanded to be abutted against the inner wall of the connecting body 403 to conduct electricity, and in order to obtain a better contact effect, conducting structure glue can be arranged between the conducting ring 6 and the connecting body 403, and the conducting ring 6 and the connecting body 403 are connected into a whole;
the middle position of the conductive ring 6 is provided with a plurality of protrusions 601 protruding towards the inside, and the battery cell 3 is elastically connected with the conductive ring 6 through the protrusions 601.
The first embodiment specifically describes a first structural form of the first lead-out portion 4, which includes the above-mentioned fixing body 401, the connecting body 403, and the first lead-out body 402; wherein, the plastic bracket 2 is directly fixed at the upper position of the frame 1 and is specifically fixedly connected with the inner walls of the side plates 102 at the two sides. The fixing body 401 is a structure having a cross-sectional size not larger than that of the plastic support 2, and a plurality of connecting bodies 403 are formed on the fixing body 401 to protrude downward at intervals in the X direction according to the positions and the number of the mounting holes, and the connecting bodies 403 are embedded in the mounting holes, while the first lead-out body 402 protrudes from the fixing body 401 of the first embodiment, and the first lead-out body 402 is connected to the circuit layer of the frame main body 103 to form an electrical connection.
Meanwhile, since the battery cell 3 is fixed and positioned by the conductive ring 6, according to the structure of the connecting body 403 and the conductive ring 6 of the first embodiment, the mounting hole is divided into two parts, namely the upper hole 201 and the lower hole 202, and the two parts are transited by the step surface. The connecting body 403 is inserted into the upper portion of the upper hole 201, the connecting body 403 contacts with the outer peripheral surface of the upper portion of the conductive ring 6 to form an elastic connection, and the lower end of the conductive ring 6 is directly supported on the step surface and is finally inserted into the battery cell 3.
Example two, referring to fig. 8 to 10, example two shows a second embodiment of the first lead-out 4:
the plastic bracket 2 of the second embodiment is mounted on a plurality of groups of battery packs along the X direction;
each group of the battery packs has a first lead-out portion 4 extending in the Y direction;
the first lead portion 4 has:
a fixing body 401 connected to the plastic bracket 2;
a connecting body 403 bent toward the inside of the mounting hole and embedded in the mounting hole; and
a first lead-out body 402 formed at an end portion of the fixed body 401 near one end of the frame main body portion 103, bent toward the circuit layer, and connected to the circuit layer;
the conductive rings 6 of the same group are all electrically connected to the circuit layer through the first lead-out 402 of the first lead-out 4 of the group.
Different from the first lead-out part 4 disclosed in the first embodiment, the frame 1 and the plastic support 2 of the present embodiment are elongated in the Y direction as a whole, and can accommodate multiple groups of battery packs, each group of battery packs having multiple battery cells 3. A plurality of first lead portions 4 are provided for each of the plurality of groups of battery packs, a plurality of connecting bodies 403 are provided at intervals in the Y direction for each of the first lead portions 4, and the fixing body 401 is connected to the plastic holder 2, and the end portion of the fixing body 401 in the Y direction of this embodiment is formed as the first lead portion 402, and is bent toward the circuit layer side and connected to the circuit layer.
The structure of the mounting hole of the second embodiment is substantially the same as that of the mounting hole of the first embodiment, and specifically includes:
the mounting holes are divided into an upper hole 201 and a lower hole 202 from top to bottom;
the inner diameter of the upper hole 201 is larger than that of the lower hole 202, and a transition part between the upper hole 201 and the lower hole 202 is formed into a step surface;
the connector 403 has a circular ring shape, and the connector 403 is inserted into the upper portion of the upper hole 201;
the upper part of the conducting ring 6 is in contact with the inner wall of the connecting body 403, the lower end of the conducting ring 6 is supported on the step surface, the conducting ring 6 is an annular spring and is provided with a notch, when the conducting ring 6 is placed in the mounting hole, the notch is contracted, after the conducting ring 6 is placed in place, the conducting ring 6 is expanded to be abutted against the inner wall of the connecting body 403 to conduct electricity, and in order to obtain a better contact effect, conducting structure glue can be arranged between the conducting ring 6 and the connecting body 403, and the conducting ring 6 and the connecting body 403 are connected into a whole; (ii) a
The middle position of the conductive ring 6 is provided with a plurality of protrusions 601 protruding towards the inside, and the battery cell 3 is elastically connected with the conductive ring 6 through the protrusions 601.
Since the structure of the mounting hole of the second embodiment is similar to the connection principle of the conductive ring 6 and the battery cell 3, further description is omitted here.
Third embodiment, referring to fig. 5 to 7, the third embodiment discloses a third embodiment of the first lead-out portion 4:
in the first and second embodiments, the conducting rings 6 are electrically connected by using one lead-out part to connect with each other, and the difference between the third embodiment and the first and second embodiments is that a first lead-out part 4 is designed for each conducting ring 6, and the number of the first lead-out parts 4 of the third embodiment is the same as that of the battery cells 3;
the first lead-out portion 4 is integrated at the mounting hole, and the first lead-out portion 4 has:
a connecting body 403 extending into the mounting hole and contacting the conductive ring 6;
a fixing body 401 connected to the plastic bracket 2; and
a first lead-out body 402 extending in the extending direction of the frame main body 103 and connected to the circuit layer;
the mounting hole includes:
the ring groove 203 is matched with the conductive ring 6, and the groove 204 is communicated with the ring groove 203 and extends to the upper end of the mounting hole;
the conductive ring 6 is embedded in the ring groove 203, the connecting body 403 is embedded in the groove 204 matched with the connecting body 403, the conductive ring 6 is an annular spring and is provided with a notch, when the conductive ring is placed in the mounting hole, the notch is shrunk, and after the conductive ring is placed in place, the conductive ring 6 expands and is positioned in the ring groove 203.
The number of the first lead-out portions 4 in the third embodiment is the same as that of the conductive rings 6, and the first lead-out portions 4 in the third embodiment include connecting bodies 403, fixed bodies 401, and first lead-out bodies 402; in order to insert the conductive ring 6, a ring groove 203 is designed at the upper part of the mounting hole, and a groove 204 is opened according to the position of the connecting body 403, the fixing body 401 is located at the upper end of the conductive ring 6 and is fixedly connected with the plastic bracket 2, and the connecting body 403 is inserted into the groove 204 and is connected with the conductive ring 6. The first lead 402 similarly extends toward and connects to the circuit layer.
In combination with the structure of the first lead-out portion 4 of the above three embodiments, the structure of the second lead-out portion 5 is defined further below.
The upper surface of the second lead-out portion 5 has a first insulating layer 501, and the lower surface of the second lead-out portion 5 has a second insulating layer 502;
an avoiding hole for avoiding the elastic structure 7 is formed at the position matching part of the first insulating layer 501 and the elastic structure 7.
Wherein, the elastic structure 7 comprises:
a connecting arm 701 having one end connected to the second lead-out portion 5 and the other end extending obliquely toward the electric core 3; and
a bending portion 702 formed at one end of the connecting arm 701 close to the battery cell 3.
The second lead-out portion 5 is connected to the base plate 101 through the first insulating layer 501 and the second insulating layer 502 on the upper and lower surfaces, and meanwhile, the elastic structure 7 is a portion in contact with an electrode of the battery cell 3, and can support the battery cell 3 on the one hand, and can be electrically connected to the second lead-out portion 5 through the elastic structure 7 on the other hand. The second insulating layer 502 is double-sided adhesive-backed PET, and is bonded to the bottom plate 101 of the frame 1 and to the second lead-out portion 5. The first insulating layer 501 is a single-sided adhesive-backed PET, and one surface thereof is bonded to the second lead-out portion 5 and the second insulating layer 502, which are integrated.
Based on the structure of the first leading-out part 4 of the second embodiment, when the battery is used in a vibration environment, in order to prevent the abutting force of the conductive ring 6 on the battery cell 3 from causing the battery cell 3 to move insufficiently, the insulating layer 8 is further designed on the upper part, the insulating layer 8 covers one electrode of the battery cell 3, so that heat is conducted into the gland 9 through the insulating layer 8, and the insulating layer 8 plays a role in heat conduction and insulation, such as a heat conduction silica gel sheet. The gland 9 is buckled on the insulating layer 8, the gland 9 is provided with two opposite bending edges, and the two bending edges are positioned outside the frame 1 and connected with the outer side walls of the two side plates 102 of the frame 1.
Above-mentioned three kinds of embodiments all can realize taking out alone when electric core 3 is installed and is disassembled, convenient change or reutilization. The elastic structures 7 of the other three embodiments are substantially identical, specifically:
as shown in fig. 11, the second lead portion 5 theoretically has a hole coaxial with the mounting hole, but of course, there may be mounting errors. At least one elastic sheet is arranged along the circumferential direction of the hole, and one or more elastic sheets form the elastic structure 7 of the embodiment.
This elastic structure 7 includes linking arm 701 and bending portion 702, and linking arm 701 one end is connected with the periphery in hole, and the other end extends towards electrode one side of electric core 3, and linking arm 701 keeps away from hole one side bending type and becomes bending portion 702, and bending portion 702 is towards keeping away from electric core 3 direction bending type. When the embodiment has only one elastic sheet, the wave crests at the connection position of the bending portion 702 and the connecting arm 701 are abutted to the center of the electrode, and when the embodiment is a plurality of elastic sheets, the plurality of elastic sheets are uniformly distributed along the circumference of the hole, and the plurality of wave crests are located in the electrode contact surface of the corresponding battery core 3. Because electric core 3 is naked electric core, and the surface does not have insulating protective layer, and the casing that is located the bottom is the negative pole and near apart from the positive pole of bottom, and the minimum electrical clearance of linking arm 701 and casing is 2 ~ 4mm, effectively ensures the short circuit that the hole concentric error that conducting ring 6 and shell fragment were located caused.
In addition, referring to fig. 10, in the connection structure of the first lead-out portion 4 and the plastic support 2 in the second embodiment, the fixing body 401 is provided with a plurality of connection holes 404, the plurality of connection holes 404 are inverted in the plastic support 2, the plastic support 2 and the first lead-out portion 4 of this embodiment are integrally formed through an injection molding process, and the inverted connection holes 404 effectively prevent the first lead-out portion 4 from being separated from the plastic support 2 due to the pulling-out force of the battery cell 3.
The frame main body part that this application relates to can be aluminium base circuit board, and it is as an organic whole with bottom plate, curb plate, also can be PCB circuit board, fixes on plastic support.
In the technical scheme, the welding-free battery module provided by the invention has the following beneficial effects:
the welding-free battery module is only provided with one plastic support 2 to fix the battery cell 3, the problem that the concentricity of the two plastic supports 2 is difficult to ensure in the prior art is effectively solved, and the installation and the disassembly are difficult, in addition, the conducting ring 6 is arranged in the installation hole, the conducting ring 6 is provided with a plurality of convex parts protruding towards the peripheral circle of the battery cell shell, the plurality of convex parts 601 distributed along the circumference are in multipoint elastic contact with the peripheral circle of the battery cell shell, the double functions of conduction and fixation are realized, the support and the conduction of another electrode are realized through the elastic structure 7, the battery cell is easily kept in a vertical state through the elastic structure 7 and the elastic abutting force of the plurality of convex parts, and the reliability is improved.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.
Claims (10)
1. Exempt from to weld battery module, its characterized in that, this battery module includes:
a battery pack having at least one cell (3);
a frame (1), wherein the frame (1) is internally formed into a containing cavity; and
the plastic support (2) is fixed in a containing cavity of the frame (1), the plastic support (2) is parallel to a bottom plate (101) of the frame (1), the plastic support (2) is provided with mounting holes with the number being consistent with that of the battery cores (3), and the battery cores (3) are mounted in the mounting holes;
the plastic bracket (2) is provided with a first conductive structure;
a second conductive structure is arranged on the bottom plate (101) of the frame (1);
the first conductive structure comprises a conductive ring (6) and a first lead-out part (4) electrically connected with the conductive ring (6), and the conductive ring (6) is installed in the installation hole and is in contact with the peripheral surface of the battery cell (3);
the second conductive structure comprises a second lead-out part (5), and the second lead-out part (5) is provided with an elastic structure (7) which is in contact with an electrode of the battery cell (3).
2. The welding-free battery module as claimed in claim 1, wherein the frame (1) comprises:
the base plate (101);
the side plates (102) are positioned at two ends of the X direction of the bottom plate (101) and extend along the vertical direction;
the plastic support (2) is fixedly connected with the inner wall of the side plate (102).
3. The welding-free battery module as claimed in claim 2, wherein the frame (1) comprises:
the frame is provided with a frame main body part (103), the frame main body part (103) is positioned at one end of the bottom plate (101) in the Y direction, and a circuit layer is arranged on the frame main body part (103);
a first lead-out portion (4), the first lead-out portion (4) being electrically connected to both the conductive ring (6) and the circuit layer;
and a second lead-out portion (5), wherein the second lead-out portion (5) is electrically connected with the circuit layer.
4. The welding-free battery module as claimed in claim 3, wherein the first lead-out part (4) has:
a fixing body (401) connected with the plastic bracket (2);
a connecting body (403) which is bent toward the inside of the mounting hole and is embedded into the mounting hole; and
a first lead-out body (402) having one end connected to the fixed body (401) and the other end extending in the extending direction of the frame main body (103) and connected to the circuit layer;
all the conductive rings (6) are electrically connected with the circuit layer through the first lead-out body (402) of the first lead-out portion (4).
5. The welding-free battery pack as claimed in claim 3, wherein the plastic bracket (2) is mounted with a plurality of sets of the battery packs along the X direction;
each group of the battery packs has one first lead-out portion (4) extending in the Y direction;
the first lead-out portion (4) has:
a fixing body (401) connected with the plastic bracket (2);
a connecting body (403) which is bent toward the inside of the mounting hole and is embedded into the mounting hole; and
a first lead-out body (402) formed at an end of the fixed body (401) near one end of the frame body (103), bent toward the circuit layer, and connected to the circuit layer;
the conductive rings (6) of the same group are all electrically connected with the circuit layer through the first lead-out body (402) of the first lead-out part (4) of the group.
6. The welding-free battery module as claimed in claim 4 or 5, wherein the mounting hole is divided into an upper hole (201) and a lower hole (202) from top to bottom;
the inner diameter of the upper hole (201) is larger than that of the lower hole (202), and a transition part of the upper hole (201) and the lower hole (202) is formed into a step surface;
the connecting body (403) is annular, and the connecting body (403) is embedded into the upper part of the upper hole (201);
the upper part of the conductive ring (6) is in contact with the inner wall of the connecting body (403), and the lower end of the conductive ring (6) is supported on the step surface;
the middle position of the conducting ring (6) is provided with a plurality of protrusions (601) protruding towards the inside, and the battery cell (3) is elastically connected with the conducting ring (6) through the protrusions (601).
7. The welding-free battery module as claimed in claim 3, wherein the number of the first lead-out parts (4) is the same as the number of the battery cells (3);
the first lead-out portion (4) is integrated at the mounting hole, and the first lead-out portion (4) has:
a connecting body (403) extending into the mounting hole and contacting the conductive ring (6);
a fixing body (401) connected with the plastic bracket (2); and
a first lead-out body (402) extending in the extending direction of the frame main body (103) and connected to the circuit layer;
the mounting hole includes:
the annular groove (203) is matched with the conductive ring (6), and the groove (204) is communicated with the annular groove (203) and extends to the upper end of the mounting hole;
the conductive ring (6) is embedded in the annular groove (203), and the connecting body (403) is embedded in the groove (204).
8. The welding-free battery module as recited in claim 1, wherein the upper surface of the second lead-out portion (5) has a first insulating layer (501), and the lower surface of the second lead-out portion (5) has a second insulating layer (502);
the first insulating layer (501) and the elastic structure (7) are provided with avoidance holes at positions matched with each other to avoid the elastic structure (7).
9. The welding-free battery module as claimed in claim 1, wherein the elastic structure (7) comprises:
a connecting arm (701) with one end connected with the second leading-out part (5) and the other end extending towards the battery cell (3) in an inclined way; and
and a bending part (702) formed at one end of the connecting arm (701) close to the battery cell (3).
10. The welding-free battery module as claimed in claim 1, wherein the top of the frame (1) has a gland (9);
an insulating layer (8) is arranged between the gland (9) and the battery pack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111671174.7A CN114284616B (en) | 2021-12-31 | 2021-12-31 | Welding-free battery module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111671174.7A CN114284616B (en) | 2021-12-31 | 2021-12-31 | Welding-free battery module |
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| Publication Number | Publication Date |
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| CN114284616A true CN114284616A (en) | 2022-04-05 |
| CN114284616B CN114284616B (en) | 2024-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111671174.7A Active CN114284616B (en) | 2021-12-31 | 2021-12-31 | Welding-free battery module |
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| CN114678651A (en) * | 2022-04-14 | 2022-06-28 | 北京科易动力科技有限公司 | Explosion-proof valve and battery pack with same |
| CN114744361A (en) * | 2022-04-14 | 2022-07-12 | 北京科易动力科技有限公司 | Ejector pin type explosion-proof valve and battery pack with same |
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| CN111048709A (en) * | 2018-10-13 | 2020-04-21 | 杭州波谱莱新能源科技有限公司 | Frame assembly for cylindrical battery pack based on welding-free technology |
| CN113675516A (en) * | 2016-11-16 | 2021-11-19 | 奥动新能源汽车科技有限公司 | Conducting strip, power battery module and power battery box |
| CN216850130U (en) * | 2021-12-31 | 2022-06-28 | 苏州科易新动力科技有限公司 | Battery module |
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| CN113675516A (en) * | 2016-11-16 | 2021-11-19 | 奥动新能源汽车科技有限公司 | Conducting strip, power battery module and power battery box |
| CN111048709A (en) * | 2018-10-13 | 2020-04-21 | 杭州波谱莱新能源科技有限公司 | Frame assembly for cylindrical battery pack based on welding-free technology |
| CN209374511U (en) * | 2018-12-18 | 2019-09-10 | 武汉力神动力电池***科技有限公司 | A kind of cylindrical battery mould group |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114678651A (en) * | 2022-04-14 | 2022-06-28 | 北京科易动力科技有限公司 | Explosion-proof valve and battery pack with same |
| CN114744361A (en) * | 2022-04-14 | 2022-07-12 | 北京科易动力科技有限公司 | Ejector pin type explosion-proof valve and battery pack with same |
| CN114744361B (en) * | 2022-04-14 | 2024-04-19 | 北京科易动力科技有限公司 | Ejector pin type explosion-proof valve and battery pack with same |
| CN114678651B (en) * | 2022-04-14 | 2024-04-19 | 北京科易动力科技有限公司 | Explosion-proof valve and battery pack with same |
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| Publication number | Publication date |
|---|---|
| CN114284616B (en) | 2024-07-02 |
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