CN215896555U

CN215896555U - Battery module

Info

Publication number: CN215896555U
Application number: CN202121875118.0U
Authority: CN
Inventors: 徐尚伟; 张国江
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2021-08-11
Filing date: 2021-08-11
Publication date: 2022-02-22
Anticipated expiration: 2031-08-11

Abstract

The utility model provides a battery module, include shell and holding the electric core group in the shell, the electric core group includes a plurality of monomer electricity cores, each monomer electricity core is by folding the placing in proper order, and each monomer electricity core is end to end connection in proper order in order to form the electric core group, be provided with a spacer block between two adjacent monomer electricity cores wherein, be provided with the fuse in the spacer block, the fuse is connected with the monomer electricity core that is located the spacer block both sides respectively, thus, when arbitrary monomer electricity core in the battery module takes place unusually, can trigger the fuse rapidly, thereby with abnormal control on unusual monomer electricity core, avoid reaching other monomer electricity cores of battery module, thereby improve the security of battery module.

Description

Battery module

Technical Field

The utility model relates to the field of soft package batteries, in particular to a battery module.

Background

Laminate polymer battery, the battery that indicates regard as the extranal packing with the plastic-aluminum membrane, single laminate polymer battery's load carrying capacity is less, in order to improve laminate polymer battery's load carrying capacity and be convenient for to laminate polymer battery installation, can establish ties or connect in parallel with a plurality of laminate polymer battery in order to form the battery module usually, connects a plurality of battery modules in order to form the battery package that has great load carrying capacity again.

The battery package has improved laminate polymer battery's loading capacity on the one hand, but has also brought the energy simultaneously and has concentrated, can cause chain reaction's safety problem when taking place unusually, consequently, in order to improve the security of battery package, each household electrical appliances battery manufacturer can install the fuse in the battery package, but does not place the fuse in the single battery module.

However, the above safety measures have the following problems that because the fuse is installed at the battery pack level, when a single soft package battery in a certain battery module is abnormal, the hidden danger can be transmitted to the battery pack level to trigger the fuse, and because the response is not timely, the battery core is easy to expand, so that the whole battery pack is damaged.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provide a battery module which can quickly trigger a fuse when a soft package battery is abnormal, so that the abnormal quick response is realized, and the risk of thermal runaway of the battery is reduced.

The purpose of the utility model is realized by the following technical scheme:

a battery module, comprising: the battery pack comprises a shell and a battery pack accommodated in the shell;

the battery core group comprises a plurality of monomer battery cores, each monomer battery core is sequentially stacked, and the monomer battery cores are sequentially connected end to form the battery core group;

a spacing block is arranged between two adjacent monomer battery cores, fuses are arranged in the spacing block, and the fuses are respectively connected with the monomer battery cores positioned on two sides of the spacing block.

In one embodiment, a receiving groove is formed in the spacer block, and the fuse is received in the receiving groove.

In one embodiment, the spacing block is further provided with a position-avoiding gap penetrating through the accommodating groove, and the tabs of the single battery cells penetrate through the position-avoiding gap.

In one embodiment, reinforcing ribs are disposed within the spacer blocks.

In one embodiment, a support is further disposed between two adjacent single battery cells, and the tabs of the single battery cells are inserted through the support.

In one embodiment, the housing comprises a lower shell and a top cover, wherein the lower shell is provided with a containing groove, the electric core pack is contained in the containing groove, and the top cover is buckled with the lower shell to seal the containing groove.

In one embodiment, the lower casing includes a bottom casing and two end plates, a U-shaped groove is formed in the bottom casing, and the two end plates are respectively disposed at two ends of the U-shaped groove, so that the inner side wall of the U-shaped groove and the surfaces of the two end plates jointly enclose the accommodating groove.

In one embodiment, the battery module further includes an acquisition assembly, the acquisition assembly includes a plug terminal and an FPC cable, the plug terminal is disposed on one of the end plates, and the FPC cable is used for being connected to the plug terminal and the tabs of the individual electric cores, respectively.

In one embodiment, the collection assembly further comprises a temperature sensor, the temperature sensor is connected with the FPC cable, and the temperature sensor is used for collecting the temperature in the accommodating groove.

In one embodiment, the battery module further comprises two copper bars, one ends of the two copper bars are respectively arranged on the two end plates, and the other ends of the two copper bars are respectively connected with two ends of the electric core group.

Compared with the prior art, the utility model has at least the following advantages:

1. a plurality of monomer electric cores lean on folding and end to end connection and form electric core group, set up the interval piece between two monomer electric cores wherein, set up the fuse again in the interval piece to the monomer electric core that makes interval piece both sides is connected with the fuse respectively, so, when arbitrary monomer electric core in the battery module takes place unusually, can trigger the fuse rapidly, thereby with the abnormal control on unusual monomer electric core, avoid reaching other monomer electric cores of battery module, thereby improve the security of battery module.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

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

fig. 2 is a partial structural view of the battery module shown in fig. 1;

FIG. 3 is a schematic view of a portion of a spacer according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a housing according to an embodiment of the present invention;

fig. 5 is a structural view of a lower case according to an embodiment of the present invention;

fig. 6 is a partial structural view of the battery module shown in fig. 1 at another angle;

fig. 7 is a partial exploded view illustrating another angle of the battery module shown in fig. 1.

Detailed Description

To facilitate an understanding of the utility model, the utility model will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings.

Referring to fig. 1 and 2, a battery module 10 includes a housing 100 and a cell pack 200 accommodated in the housing 100, the cell pack 200 includes a plurality of cell units 210, each cell unit 210 is sequentially stacked, and each cell unit 210 is sequentially connected end to form the cell pack 200, a spacer 300 is disposed between two adjacent cell units 210, a fuse 400 is disposed in the spacer 300, and the fuse 400 is respectively connected to the cell units 210 located at two sides of the spacer 300.

It should be noted that, the battery pack 200 is installed in the casing 100, the battery pack 200 is formed by sequentially stacking and connecting a plurality of monomer battery cells 210, wherein in each monomer battery cell 210, one end of each monomer battery cell 210 is provided with a positive electrode tab, and the other end is provided with a negative electrode tab, when the monomer battery cells 210 are stacked, the positive electrode tab and the negative electrode tab of each monomer battery cell 210 are sequentially connected, so that the monomer battery cells 210 are connected in series, in an embodiment, in order to improve the firmness between the electrode tabs of the monomer battery cells 210, the electrode tabs of two adjacent monomer battery cells 210 are welded and fixed together; further, a spacing block 300 is arranged between any two adjacent monomer battery cells 210, a fuse 400 is installed on the spacing block 300, the fuse 400 is used for being connected with the monomer battery cells 210 on two sides of the spacing block 300, and it should be noted that, in a conventional battery module, any two monomer battery cells 210 are directly connected in series, and in the application, the fuse 400 is connected in series between the two monomer battery cells 210, therefore, when any one monomer battery cell 210 in the battery module 10 is abnormal, the fuse 400 can be rapidly triggered, so that the abnormality is controlled on the abnormal monomer battery cell 210, the influence on other monomer battery cells 210 of the battery module 10 is avoided, and the safety of the battery module 10 can be improved; in an embodiment, the spacer 300 may be disposed between two adjacent unit cells 210 at a plurality of positions, so as to further improve the abnormal response efficiency of the battery module 10.

Referring to fig. 2 and 3, in one embodiment, an accommodating groove 310 is formed in the spacer block 300, and the fuse 400 is accommodated in the accommodating groove 310. In order to protect the fuse 400 and prevent the fuse 400 from being triggered by mistake, the accommodating groove 310 is formed in the spacer block 300, the fuse 400 is mounted in the accommodating groove 310, and the fuse 400 is protected by the inner side wall of the accommodating groove 310; in one embodiment, the spacer 300 is a plastic block with a long strip structure, and the spacer 300 is made of plastic material, so that the quality of the battery module 10 can be effectively reduced, and the battery module 10 can be light.

Referring to fig. 2 and fig. 3, in an embodiment, the spacer block 300 further has a clearance gap 320 formed through the receiving groove 310, and the tab 211 of the single battery cell 210 is inserted into the clearance gap 320. It should be noted that keep away a gap 320 and be located the lateral wall of holding tank 310, and the utmost point ear of the monomer electricity core 210 of interval piece 300 both sides all need pass interval piece 300 in order to be connected with the fuse 400 that is located the holding tank 310, consequently set up respectively on two relative to lateral walls of holding tank 310 and keep away a gap 320, so, the utmost point ear of monomer electricity core 210 just can pass from keeping away a gap 320, in order to be connected to fuse 400, keep away a gap 320 through the setting, can utilize the inside wall of keeping away a gap 320 to carry out spacingly to the utmost point ear of monomer electricity core 210, thereby be favorable to carrying out welding operation to utmost point ear and fuse 400.

Referring to fig. 2 and 3, in one embodiment, a rib 330 is disposed in the spacer block 300. It should be noted that, because each cell 210 forming the cell pack 200 is placed by stacking each other, in order to enhance the structural strength of the cell pack 200, a spacer 300 is disposed between any two cell 210, and thus, the overall structural strength of the battery module 10 can be enhanced, however, in order to make the battery module 10 strengthen, the spacer 300 is of a plastic material structure, and meanwhile, the spacer 300 is disposed as a hollow structure, so as to enhance the structural strength of the spacer 300, and prevent the spacer 300 from being deformed by extrusion, a reinforcing rib 330 is disposed in the spacer 300, for example, the reinforcing rib 330 can be disposed as a plurality of reinforcing ribs 330, and the reinforcing ribs 330 are connected in a staggered manner, so as to enhance the structural strength of the spacer 300.

Referring to fig. 1, in an embodiment, a support 500 is further disposed between two adjacent unit cells 210, and tabs of the unit cells 210 are disposed through the support 500. It should be noted that the function of the bracket 500 is the same as that of the spacer 300, and both the function and the function are to enhance the structural strength of the battery module 10, protect each single battery cell 210 inside, and prevent the single battery cell from being deformed by compression, for example, the structure of the bracket 500 may be the same as that of the spacer 300, and therefore, the fuse 400 may also be mounted on the bracket 500; for another example, the bracket 500 only plays a role of fixing, so that only a gap for allowing a tab of the battery cell 210 to pass through needs to be formed in the bracket 500, so that the structural strength of the battery module 10 can be enhanced, and the battery cell pack 200 can be more beautiful.

Referring to fig. 2, in an embodiment, an insulating cotton 600 is further disposed between all two adjacent single battery cells 210, so that it is ensured that any two adjacent single battery cells 210 are spaced by the spacer 300 or by the insulating cotton 600, and thus, the safety of each single battery cell 210 is further improved, and the problem of short circuit between two adjacent single battery cells 210 is prevented.

Referring to fig. 1 and 4, in one embodiment, the housing 100 includes a lower casing 110 and a top cover 120, the lower casing 110 is formed with a receiving slot 111, the electric core pack 200 is received in the receiving slot 111, and the top cover 120 is fastened to the lower casing 110 to seal the receiving slot 111.

It should be noted that, constitute shell 100 through the mode of lower casing 110 with top cap 120 looks lock, on the one hand, be favorable to carrying out sealing protection to electric core group 200, on the other hand is favorable to fixing the installation of electric core group 200 on shell 100, specifically, fix electric core group 200 the back at lower casing 110 earlier, fix top cap 120 lock on lower casing 110 again, can prevent that electric core group 200 and the lateral wall of lower casing 110 from taking place the contact.

Referring to fig. 4 and 5, in an embodiment, the lower shell 110 includes a bottom shell 112 and two end plates 113, a U-shaped groove 112a is formed on the bottom shell 112, and the two end plates 113 are respectively disposed on two ends of the U-shaped groove 112a, so that an inner sidewall of the U-shaped groove 112a and surfaces of the two end plates 113 jointly form a receiving groove 111.

It should be noted that the lower shell 110 is composed of a bottom shell 112 and two end plates 113, wherein the cross section of the bottom shell 112 is a U-shaped structure, and a U-shaped groove 112a is formed on the bottom shell 112, in an embodiment, the bottom shell 112 is a steel shell structure formed by stamping, and then the two end plates 113 are installed on two ends of the U-shaped groove 112a, so as to form an accommodating groove 111 for accommodating the electric core pack 200, and it should be noted that the lower shell 110 is configured as a structure combining the bottom shell 112 and the end plates 113, which can further facilitate the installation of the electric core pack 200.

Referring to fig. 1 and fig. 6, in an embodiment, the battery module 10 further includes an acquisition assembly 700, the acquisition assembly 700 includes a plug terminal 710 and an FPC cable 720, the plug terminal 710 is disposed on one of the end plates 113, and the FPC cable 720 is used for being connected to the plug terminal 710 and the tabs of the individual electric cells 210 respectively.

It should be noted that, in order to further improve the safety of the battery module 10, the battery module 10 is further provided with the collecting assembly 700, which includes the FPC cable 720 having one end welded to the tab of each cell 210, and the other end of the FPC cable 720 is connected to the plug terminal 710, so that the voltage value of the node of each cell 210 can be collected in real time by using the FPC cable 720, and when the voltage of a certain cell 210 is abnormal, the voltage value can be determined quickly, wherein the FPC cable 720 is a flexible circuit, and has the advantages of light weight and strong flexibility; in one embodiment, the FPC cable 720 and the tabs of the individual electric cells 210 are welded by nickel sheets, which can improve the stability between the FPC cable 720 and the tabs of the individual electric cells 210.

Referring to fig. 6, in an embodiment, the collecting assembly 700 further includes a temperature sensor 730, the temperature sensor 730 is connected to the FPC cable 720, and the temperature sensor 730 is used for collecting the temperature inside the accommodating cavity 111. It should be noted that the temperature sensor 730 is used to collect the temperature in the battery module 10 in real time, so as to improve the safety of the battery module 10.

Referring to fig. 1 and 7, in one embodiment, the battery module 10 further includes two copper bars 800, one end of each of the two copper bars 800 is disposed on the two end plates 113, and the other end of each of the two copper bars 800 is connected to two ends of the electric core pack 200.

It should be noted that, each individual electric core 210 in the electric core group 200 is mutually overlapped, and the positive electrode and the negative electrode are sequentially connected end to end, that is, the electric core group 200 formed by serially connecting each individual electric core 210, therefore, two copper bars 800 are respectively connected with two ends of the electric core group 200, actually, one of the copper bars 800 is connected with the positive electrode of the individual electric core 210 located at the leftmost end of the electric core group 200, the other copper bar 800 is connected with the negative electrode of the individual electric core 210 located at the rightmost end of the electric core group 200, and then the two copper bars 800 are respectively fixed on the two end plates 113, so that the battery module 10 externally forms the positive electrode and the negative electrode.

Referring to fig. 7, in an embodiment, the end plate 113 includes a supporting plate 113a and a shielding plate 113b, the supporting plate 113a and the shielding plate 113b are stacked to form the end plate 113, the plug terminal 710 is disposed on the supporting plate 113a, and the copper bar 800 is disposed on the shielding plate 113 b.

It should be noted that, wherein the guard plate body 113b is close to the electric core group 200 and sets up, so, can further improve the protective capacities of electric core group 200, further, copper bar 800 is the output of electric core group 200, and plug terminal 710 is the output of gathering, with copper bar 800 and plug terminal 710 separation installation, can prevent to take place between the two that the signal of telecommunication interferes to can improve battery module 10's security.

Referring to fig. 7, in an embodiment, a bearing seat 113c is disposed on the protection plate 113b, the copper bar 800 is disposed on the bearing seat 113c, a bearing groove 113d is disposed on the supporting plate 113a, and the bearing seat 113c is disposed through the bearing groove 113 d. It should be noted that, the inner side wall of the bearing groove 113d is used for supporting the bearing seat 113c, and when the battery module 10 needs to be connected with the outside, the inner side wall is actually connected with the copper bar 800 positioned on the bearing seat 113c, so that the structural strength of the copper bar 800 can be improved, and the problem that the copper bar 800 is deformed after being connected with an external circuit for many times is avoided.

Further, referring to fig. 7, in an embodiment, a locking nut 113e is disposed in the bearing seat 113c, a locking hole 810 is disposed on the copper bar 800, and the locking hole 810 and the locking nut 113e are disposed opposite to each other. So, utilize bolt etc. to pass behind the locking hole 810 spiro union to lock nut 113e again, just can fix copper bar 800 on bearing seat 113c to can improve the convenience that copper bar 800 and external circuit are connected.

Referring to fig. 7, in one embodiment, a reinforcing block 112d is disposed between the bottom plate 112b and the side plate 112c of the bottom case 112, and the reinforcing block 112d is respectively connected to the bottom plate 112b and the side plate 112c to form a triangular supporting structure. It should be noted that, by providing the reinforcing blocks 112d to form a triangular support structure, the structural strength between the bottom plate 112b and the side plate 112c can be effectively improved, and deformation between the side plate 112c and the bottom plate 112b can be prevented.

Further, referring to fig. 1, in one embodiment, an insulating layer is disposed between the electric core assembly 200 and the top cap 120, and the top cap 120 is a steel shell structure, so that the top cap 120 and the electric core assembly 200 can be insulated from each other, and the safety of the battery module 10 is improved.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A battery module, comprising: the battery pack comprises a shell and a battery pack accommodated in the shell;

2. The battery module as set forth in claim 1, wherein a receiving groove is defined in the spacer block, and the fuse is received in the receiving groove.

3. The battery module according to claim 2, wherein the spacer block is further provided with a space-avoiding gap penetrating through the accommodating groove, and the tab of the single battery cell is inserted into the space-avoiding gap.

4. The battery module according to claim 1 or 3, wherein reinforcing ribs are provided in the spacer block.

5. The battery module according to claim 1 or 3, wherein a support is further disposed between two adjacent single battery cells, and the tabs of the single battery cells are inserted into the support.

6. The battery module according to claim 1 or 3, wherein the housing comprises a lower case and a top cover, the lower case is provided with a receiving groove, the battery cell pack is received in the receiving groove, and the top cover is engaged with the lower case to seal the receiving groove.

7. The battery module according to claim 6, wherein the lower case comprises a bottom case and two end plates, the bottom case is provided with a U-shaped groove, and the two end plates are respectively arranged at two ends of the U-shaped groove, so that the inner side wall of the U-shaped groove and the surfaces of the two end plates jointly enclose the accommodating groove.

8. The battery module according to claim 7, further comprising an acquisition assembly, wherein the acquisition assembly comprises a plug terminal and an FPC (flexible printed circuit) cable, the plug terminal is disposed on one of the end plates, and the FPC cable is used for being connected with the plug terminal and a tab of the single battery cell respectively.

9. The battery module as recited in claim 8, wherein the collecting assembly further comprises a temperature sensor connected to the FPC cable, the temperature sensor being configured to collect the temperature inside the receiving groove.

10. The battery module according to claim 7, further comprising two copper bars, wherein one ends of the two copper bars are respectively disposed on the two end plates, and the other ends of the two copper bars are respectively connected to two ends of the electric core set.