CN217361758U

CN217361758U - Battery module

Info

Publication number: CN217361758U
Application number: CN202220792812.4U
Authority: CN
Inventors: 郑盼斌; 张亚儒; 朱家浩
Original assignee: Shanghai Lanjun New Energy Technology Co Ltd
Current assignee: Shanghai Lanjun New Energy Technology Co Ltd
Priority date: 2022-04-07
Filing date: 2022-04-07
Publication date: 2022-09-02
Anticipated expiration: 2032-04-07

Abstract

The utility model provides a battery module, which comprises a shell, an insulating part, a plurality of battery cores and two pole assemblies; the pole assembly comprises a pole and a sealing nail; the pole is provided with a first connecting hole, the sealing nail is arranged in the first connecting hole, the side wall of the sealing nail is provided with a first conical surface, and the first connecting hole is provided with a second conical surface matched with the first conical surface; each battery cell is arranged in the shell; the pole assemblies are arranged on the shell, the shell is provided with a second connecting hole, the sealing nail penetrates through the second connecting hole and is arranged on the first connecting hole, and the positive electrode and the negative electrode of each battery cell are respectively and electrically connected with the two pole assemblies; the insulating part sets up between shell and utmost point post subassembly, and the insulating part is used for avoiding leading electrically between shell and the utmost point post subassembly, and the insulating part is used for sealed second connecting hole. The utility model discloses a guidance quality of the battery module utilization conical surface for can not take place the incline between the first connecting hole of sealed nail and utmost point post, be convenient for guarantee utmost point post subassembly and shell department's leakproofness, convenient to use.

Description

Battery module

Technical Field

The utility model relates to a battery output pole technical field especially relates to a battery module.

Background

As new energy is developed domestically, many technical problems, for example, a safety problem of a battery, are gradually generated.

The current power battery is generally a product formed by connecting a plurality of battery cells with each other. In order to avoid the influence of air on the charging and discharging of the battery core and ensure the safety of the battery during use, a sealed protective shell is usually arranged outside the battery core to seal the battery core inside. Therefore, an output electrode needs to be arranged on the protective shell of the battery to communicate the battery core inside the battery with an external power supply.

The existing electrode is usually of a split structure, namely, one part of the electrode is structurally arranged in the protective shell, the other part of the electrode is connected with the outer side of the protective shell, and the two parts are mutually buckled and fixedly arranged on the protective shell. However, the electrode of this type is prone to errors during assembly, which makes assembly difficult.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a battery module for there is the problem of error and assembly difficulty in solving current electrode when the assembly.

In order to achieve the purpose, the utility model provides a battery module, which comprises a shell, an insulating part, a plurality of battery cores and two pole assemblies; the pole assembly comprises a pole and a sealing nail; the pole is provided with a first connecting hole, the sealing nail is detachably arranged in the first connecting hole, the side wall of the sealing nail is provided with a first conical surface, and the first connecting hole is provided with a second conical surface matched with the first conical surface; the shell is arranged in a hollow and sealed mode, and each battery cell is arranged in the shell; the pole post assemblies are arranged on the shell, the shell is provided with a second connecting hole, the sealing nails penetrate through the second connecting hole and are arranged in the first connecting hole, the positive pole of each battery cell is electrically connected with the sealing nail of one pole post assembly, and the negative pole of each battery cell is electrically connected with the sealing nail of the other pole post assembly; the insulating part set up in the shell with between the utmost point post subassembly, the insulating part is used for avoiding the shell with electrically conduct between the utmost point post subassembly, just the insulating part is used for sealing the second connecting hole.

The utility model discloses a battery module beneficial effect lies in: through the shell is to each electric core seals, and through setting up utmost point post subassembly is to each the positive pole and the negative pole of electric core communicate, make the battery module can carry out charge-discharge work, and sets up the insulating part is right utmost point post subassembly with junction between the shell is insulated, avoids the battery module leads to when carrying out charge-discharge the shell is electrified, also can avoid simultaneously the direct short circuit of electric core. Through sealed nail with set up first conical surface and the second conical surface of mutually supporting respectively on the utmost point post, can utmost point post subassembly is fixed when on the shell, utilize the guidance quality of the conical surface makes sealed nail with can not take place the incline between the first connecting hole of utmost point post, be convenient for guarantee utmost point post subassembly with the leakproofness of shell department is also convenient for sealed nail sets up the assembly when a plurality of, still is convenient for outside structure is connected to utmost point post makes and makes battery module is more standard, convenient to use.

In one possible embodiment, the sealing nail is provided with a first section and a second section; the first section part is arranged on one side, away from the pole, of the shell, the diameter of the first section part is larger than that of the second connecting hole, the diameter of the second section part is smaller than that of the second connecting hole, and the first conical surface is arranged on the second section part. The beneficial effects are that: the first section part is positioned in the shell, the diameter of the first section part is set to be larger than that of the second connecting hole, so that the sealing nail and the pole can be mutually extruded and fixed on the shell, and the sealing nail cannot penetrate through the second connecting hole to cause the problem that the pole assembly falls off; through with the diameter of second section portion sets up to be less than the second connecting hole, be convenient for sealed nail set up in utmost point post is convenient for sealed nail with set up the insulating part between the shell.

In one possible embodiment, the taper angle of the first tapered surface is 3 to 6 degrees.

In a possible solution, when the sealing nail is disposed in the first connection hole, the first connection hole and the sealing nail are in an interference fit. The beneficial effects are that: through with sealed nail with set up to interference fit between the first connecting hole, can promote sealed nail with structural strength between the utmost point post.

In a possible solution, the sealing nails and the first connection holes are provided in a plurality, and each sealing nail and each first connection hole are respectively provided correspondingly. The beneficial effects are that: by the arrangement, the number of the fixed points between the sealing nail and the pole is increased, and the structural force between the sealing nail and the pole is increased; in addition, the sealing nails are arranged in a plurality, so that the sealing nails can be conveniently connected with other structures, and the battery cores can be conveniently connected in a plurality.

In one possible solution, the insulator includes a first insulator and a second insulator; the first insulator is arranged between the sealing nail and the shell and is used for avoiding electric conduction between the sealing nail and the shell; the second insulator is arranged between the pole and the shell, and the second insulator is used for avoiding the conduction between the pole and the shell. The beneficial effects are that: the insulation member is arranged to be a split structure of the first insulation body and the second insulation body, so that the insulation member is convenient to mount.

In a possible solution, the first insulator is sleeved on the sealing nail, and the first insulator comprises a thick section part and a thin section part; thick section portion set up in the shell, thin section portion set up in the second connecting hole with between the second section portion, thick section portion set up in the shell with between the first section portion, just the diameter of thick section portion is greater than the diameter of second connecting hole. The beneficial effects are that: through inciting somebody to action first insulator sets up to thick section portion and thin section portion, can be right respectively the shell with junction between the first section portion with the shell with junction between the second section portion is insulated, guarantees insulating effect, and will thick section portion sets up to being greater than the diameter of second connecting hole can guarantee when thick section portion is extruded lie in first section portion with between the shell, avoid thick section portion remove extremely in the second connecting hole.

In a feasible scheme, the second insulator is provided with a groove adapted to the outer contour of the pole, the second insulator is provided with a third connecting hole adapted to the sealing nail, the pole is arranged in the groove, and the sealing nail penetrates through the third connecting hole and is arranged in the first connecting hole. The beneficial effects are that: the second insulator is arranged in the sealing nail through the third connecting hole, the second insulator is prevented from falling off, the pole is arranged in the groove, the contact area of the second insulator and the pole is increased, and the insulation effect is improved.

In one possible solution, an adapter is further included; the adaptor set up in sealed nail with between the shell, the adaptor is equipped with the fourth connecting hole, sealed nail pass the fourth connecting hole set up in first connecting hole, each the positive pole or the negative pole of electric core with the adaptor electricity is connected. The beneficial effects are that: the fourth connecting hole is convenient for the sealing nail and the adaptor are fixed, and the adaptor is convenient for the connection of the output stage of the battery cell.

In one possible solution, a third insulator is further included; the third insulator is provided with a fifth connecting hole, the third insulator is arranged between the adaptor and the shell, the sealing nail penetrates through the fifth connecting hole and is arranged in the first connecting hole, and the third insulator is used for preventing the adaptor and the shell from conducting electricity. The beneficial effects are that: the fifth connecting hole is arranged to facilitate fixation of the third insulator, and the third insulator is arranged to facilitate insulation between the shell and the adaptor.

Drawings

Fig. 1 is a schematic view of a partial cross-sectional structure of a battery module according to a first embodiment of the present invention;

fig. 2 is a schematic diagram illustrating a partial explosion structure of a battery module according to a first embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of the first insulator and seal pin of FIG. 2;

fig. 4 is a schematic structural diagram of a battery module according to a second embodiment of the present invention.

Reference numbers in the figures:

1. a housing;

2. an insulating member; 201. a first insulator; 202. a second insulator; 203. a thick section part; 204. a thin section part;

3. a pole assembly; 301. a pole column; 302. sealing the nail; 303. a first section; 304. a second section;

4. an adaptor;

5. a third insulator.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the drawings of the present invention are combined to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention. Unless defined otherwise, technical or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. As used herein, the word "comprising" and similar words are intended to mean that the element or item preceding the word comprises the element or item listed after the word and its equivalent, but not the exclusion of other elements or items.

To the problem that prior art exists, the embodiment of the utility model provides a battery module.

Fig. 1 is a schematic diagram of a partial cross-sectional structure of a battery module according to a first embodiment of the present invention, and fig. 2 is a schematic diagram of a partial explosion structure of a battery module according to a first embodiment of the present invention.

In some embodiments of the present invention, referring to fig. 1 and 2, the battery module includes a housing 1, an insulating member 2, a plurality of battery cells (not shown), and two pole assemblies 3; the pole assembly 3 comprises a pole 301 and a sealing nail 302; the pole 301 is provided with a first connecting hole, the sealing nail 302 is detachably arranged in the first connecting hole, the side wall of the sealing nail 302 is provided with a first conical surface, and the first connecting hole is provided with a second conical surface matched with the first conical surface; the shell 1 is arranged in a hollow and sealed mode, and each battery cell is arranged in the shell 1; the pole assemblies 3 are arranged in the shell 1, the shell 1 is provided with a second connecting hole, the sealing nails 302 penetrate through the second connecting hole and are arranged in the first connecting hole, the positive pole of each battery cell is electrically connected with the sealing nail 302 of one pole assembly 3, and the negative pole of each battery cell is electrically connected with the sealing nail 302 of the other pole assembly 3; insulating part 2 set up in shell 1 with between the utmost point post subassembly 3, insulating part 2 is used for avoiding shell 1 with electrically conduct between the utmost point post subassembly 3, just insulating part 2 is used for sealing the second connecting hole.

In some embodiments of the present invention, the housing 1 is a cuboid structure, and is sealed in the hollow space. The plurality of battery cells (not shown) are fixedly arranged in the shell 1 in a row and multiple columns, multiple rows and multiple columns or multiple rows and multiple columns. The two pole assemblies 3 are respectively arranged on two opposite side surfaces of the shell 1. First conical surface with the second conical surface is the circular conical surface, the second connecting hole is the round hole, sealed nail 302 through interference fit fixed set up in the first connecting hole, just sealed nail 302 with utmost point post 301 extrusion insulating part 2 to rely on pretightning force between them to make utmost point post subassembly 3 fixed set up in the second connecting hole.

The pole 301 is a plate-shaped or sheet-shaped structure, and the first connection hole is arranged in the pole 301 in a penetrating manner. In some embodiments, the casing 1 is a split structure of a drawing casing, and the split structure of the casing 1 is welded and fixed after the battery cell is installed in the casing 1.

The sealing nail 302 is close to between the side of shell 1, sealing nail 302 with between the second connecting hole and utmost point post 301 is close to all be equipped with between the side of shell 1 insulating part 2 carries out insulating seal. The insulating part 2 is pressed by the pretightening force between the sealing nail 302 and the pole 301, so that the sealing effect at the second connecting hole can be improved. The insulating part 2 is made of rubber or plastic material.

In some embodiments, two of the pole assemblies 3 are disposed on the same side or adjacent sides of the housing 1.

In other embodiments, the first tapered surface and the second tapered surface may be provided as a positive tapered surface structure. In some specific embodiments, the first conical surface and the second conical surface are both provided as a regular hexagonal pyramid surface with a size adapted.

The utmost point post subassembly 3 the one side at sealed nail 302 place set up in the shell 1, utmost point post subassembly 3 the one side at utmost point post 301 place set up in the outside of shell 1, each the anodal wire and one of passing through of electric core sealed nail 302 on the utmost point post subassembly 3 is connected, and the negative pole of each electric core passes through the wire and another sealed nail 302 of utmost point post subassembly 3 is connected. The pole 301 is used for being electrically connected with a power supply or the pole 301 of another battery module.

Fig. 3 is a schematic cross-sectional view of the first insulator and the seal pin of fig. 2.

In some embodiments of the present invention, referring to fig. 1-3, the seal nail 302 is provided with a first section 303 and a second section 304; the first section 303 is disposed on one side of the housing 1 far away from the pole 301, a diameter of the first section 303 is larger than a diameter of the second connection hole, a diameter of the second section 304 is smaller than the diameter of the second connection hole, and the first conical surface is disposed on the second section 304.

In some embodiments of the present invention, the cross-sectional shapes of the first segment 303 and the second segment 304 are both circular, the first segment 303 is located in the housing 1, the second segment 304 passes through the second connecting hole set in the first connecting hole, and the first conical surface is set in one end of the second segment 304 far away from the first segment 303.

In still other embodiments, the cross-section of the first segment 303 and the second segment 304 may be rectangular, square, oval or polygonal.

In some embodiments, the pre-tightening force between the sealing nail 302 and the pole 301 can also be achieved by providing a threaded structure. In some specific embodiments, the first tapered surface and the second tapered surface are provided with mutually adapted tapered threads.

In some embodiments of the present invention, referring to fig. 1, the taper angle of the first conical surface is 3 degrees to 6 degrees.

In some embodiments of the present invention, the angles of the taper angles of the first and second tapered surfaces are both 3 °.

In some embodiments, the angle of the taper angle of the first tapered surface and the second tapered surface is 6 °.

In still other embodiments, the angle of the taper angle of the first tapered surface and the second tapered surface is 4 ° or 5 °.

In some embodiments, referring to fig. 1 and 2, the sealing nail 302 and the first connection hole are all set to be a plurality of, and each the sealing nail 302 and each the first connection hole corresponds the setting respectively.

In some embodiments of the present invention, the first sealing nail 302 and the first connection hole are all set to be five. During assembly, the sealing pin 302 is automatically centered by the guiding effect of the first tapered surface and the second tapered surface, so that the sealing pin 302 can be accurately installed in the first connecting hole.

In some embodiments, the second connection holes are provided in five.

In still other embodiments, the first connection hole and the seal pin 302 are each set to three or other values.

In some embodiments of the present invention, referring to fig. 1 and 2, the insulator 2 includes a first insulator 201 and a second insulator 202; the first insulator 201 is disposed between the sealing nail 302 and the housing 1, and the first insulator 201 is used for avoiding electric conduction between the sealing nail 302 and the housing 1; the second insulator 202 is disposed between the pole 301 and the housing 1, and the second insulator 202 is used to prevent the electric conduction between the pole 301 and the housing 1.

In some embodiments of the present invention, the first insulator 201 is a rubber ring, the second insulator 202 is a rubber sheet, the number of the first insulator 201 is five, and the second insulator 202 is provided with five third connecting holes. The first insulator 201 is arranged between the side faces of the sealing nails 302 close to the shell 1, and the first insulator 201 is arranged between the sealing nails 302 and the second connecting holes; the second insulator 202 is disposed between the housing 1 and the pole 301.

In some embodiments, the first insulator 201 may be provided as a unitary structure when the sealing nail 302 is provided in plurality.

In some embodiments of the present invention, referring to fig. 1 to 3, the first insulator 201 is sleeved on the sealing nail 302, and the first insulator 201 includes a thick section 203 and a thin section 204; thick section portion 203 set up in the shell 1, thin section portion 204 set up in the second connecting hole with between the second section portion 304, thick section portion 203 set up in the shell 1 with between the first section portion 303, just the diameter of thick section portion 203 is greater than the diameter of second connecting hole, the diameter of thin section portion 204 is not more than the diameter of second connecting hole.

In some embodiments of the present invention, the cross-section of the thick section portion 203 and the thin section portion 204 is circular, the thick section portion 203 and the thin section portion 204 are all sleeved on the second section portion 304 of the sealing nail 302, the thick section portion 203 and the thin section portion 204 have an inner diameter equal to the outer diameter of the second section portion 304. The length of the thin section 204 is equal to the thickness of the housing 1, and the length of the thick section 203 is set to 1mm to 3 mm.

In some embodiments, the thin section 204 is a unitary structure with the second insulator 202.

In still other embodiments, the thick section 203 is plate-shaped or sheet-shaped.

In some embodiments, referring to fig. 1 to 4, the second insulator 202 is equipped with the recess of the outline adaptation of utmost point post 301, just the second insulator 202 be equipped with the third connecting hole of sealed nail 302 adaptation, utmost point post 301 set up in the recess, sealed nail 302 passes the third connecting hole set up in first connecting hole.

In some embodiments of the present invention, the second insulator 202 is a shell-pulling structure, the number of the third connecting holes is five, the third connecting holes run through the second insulator 202, the depth of the shell-pulling structure is equal to the thickness of the pole 301. The space formed by the shell-pulling structure is the groove.

In some embodiments, when the sealing nails 302 are provided in plurality, the third connecting holes are provided as kidney-shaped holes, and each sealing nail 302 passes through the kidney-shaped hole.

In some embodiments of the present invention, referring to fig. 1 and 2, an adaptor 4 is further included; the adaptor 4 set up in sealed nail 302 with between the shell 1, adaptor 4 is equipped with the fourth connecting hole, sealed nail 302 passes the fourth connecting hole set up in first connecting hole, each the positive pole or the negative pole of electric core with adaptor 4 electricity is connected.

In some embodiments of the utility model, adaptor 4 sets up to L shape, adaptor 4 is on a parallel with and is equipped with the side of second connecting hole is equipped with the fourth connecting hole, another side of adaptor 4 be used for fixed with the wire that the output pole of electricity core is connected.

In some embodiments, the inner diameter of the fourth connecting hole is equal to the outer diameter of the second section 304, and the adaptor 4 is disposed between the thick section 203 and the first section 303.

In some embodiments of the present invention, referring to fig. 1 and 2, a third insulator 5 is further included; the third insulator 5 is provided with a fifth connecting hole, the third insulator 5 is arranged between the adaptor 4 and the shell 1, the sealing nail 302 penetrates through the fifth connecting hole and is arranged in the first connecting hole, and the third insulator 5 is used for avoiding the adaptor 4 and the shell 1 from conducting electricity.

In some embodiments of the present invention, the third insulator 5 is a plate-shaped or a sheet-shaped structure, the inner diameter of the fifth connecting hole is equal to the outer diameter of the thick section 203, and the third insulator 5 is coplanar with or overlapped with the thick section 203, and the thickness of the third insulator 5 is equal to the thickness of the thick section 203.

In some embodiments, a stepped surface is provided at the fifth connection hole, the inner diameter of the fifth connection hole existing on one step of the stepped surface is smaller than the outer diameter of the thick section 203, the inner diameter of the fifth connection hole existing on one step of the stepped surface is not smaller than the outer diameter of the thick section 203, and the thickness of the third insulator 5 is greater than the thickness of the thick section 203. In some specific embodiments, the third insulator 5 partially overlaps the thick section 203.

Although the embodiments of the present invention have been described in detail hereinabove, it is apparent to those skilled in the art that various modifications and variations can be made to these embodiments. However, it is to be understood that such modifications and variations are within the scope and spirit of the present invention as set forth in the appended claims. Moreover, the invention as described herein is capable of other embodiments and of being practiced or of being carried out in various ways.

Claims

1. A battery module is characterized by comprising a shell, an insulating part, a plurality of battery cores and two pole assemblies;

the pole assembly comprises a pole and a sealing nail;

the pole is provided with a first connecting hole, the sealing nail is detachably arranged in the first connecting hole, the side wall of the sealing nail is provided with a first conical surface, and the first connecting hole is provided with a second conical surface matched with the first conical surface;

the shell is arranged in a hollow and sealed mode, and each battery cell is arranged in the shell;

the pole post assemblies are arranged on the shell, the shell is provided with a second connecting hole, the sealing nails penetrate through the second connecting hole and are arranged in the first connecting hole, the positive pole of each battery cell is electrically connected with the sealing nail of one pole post assembly, and the negative pole of each battery cell is electrically connected with the sealing nail of the other pole post assembly;

the insulating part set up in the shell with between the utmost point post subassembly, the insulating part is used for avoiding the shell with electrically conduct between the utmost point post subassembly, just the insulating part is used for sealing the second connecting hole.

2. The battery module according to claim 1, wherein the sealing nail is provided with a first segment and a second segment;

the first section part is arranged on one side, far away from the pole, of the shell, the diameter of the first section part is larger than that of the second connecting hole, the diameter of the second section part is smaller than that of the second connecting hole, and the first conical surface is arranged on the second section part.

3. The battery module according to claim 1, wherein the taper angle of the first tapered surface is 3 to 6 degrees.

4. The battery module according to claim 1, wherein the sealing nail is in interference fit with the first connection hole when the sealing nail is disposed in the first connection hole.

5. The battery module according to claim 1, wherein the sealing pins and the first connecting holes are provided in a plurality, and each sealing pin is provided corresponding to each first connecting hole.

6. The battery module according to claim 2, wherein the insulating member includes a first insulator and a second insulator;

the first insulator is arranged between the sealing nail and the shell and is used for avoiding electric conduction between the sealing nail and the shell;

the second insulator is arranged between the pole and the shell, and the second insulator is used for avoiding the conduction between the pole and the shell.

7. The battery module according to claim 6, wherein the first insulator is sleeved on the sealing nail, and the first insulator comprises a thick section part and a thin section part;

thick section portion set up in the shell, thin section portion set up in the second connecting hole with between the second section portion, thick section portion set up in the shell with between the first section portion, just the diameter of thick section portion is greater than the diameter of second connecting hole.

8. The battery module according to claim 6, wherein the second insulator is provided with a groove adapted to the outer contour of the terminal, and the second insulator is provided with a third connection hole adapted to the sealing nail, the terminal is disposed in the groove, and the sealing nail is disposed in the first connection hole through the third connection hole.

9. The battery module according to claim 1, further comprising an adaptor;

the adaptor set up in sealed nail with between the shell, the adaptor is equipped with the fourth connecting hole, sealed nail pass the fourth connecting hole set up in first connecting hole, each the positive pole or the negative pole of electric core with the adaptor electricity is connected.

10. The battery module according to claim 9, further comprising a third insulator;

the third insulator is provided with a fifth connecting hole, the third insulator is arranged between the adaptor and the shell, the sealing nail penetrates through the fifth connecting hole and is arranged in the first connecting hole, and the third insulator is used for avoiding the adaptor and the shell from conducting electricity.