CN215731972U

CN215731972U - Lithium battery

Info

Publication number: CN215731972U
Application number: CN202122249274.2U
Authority: CN
Inventors: 孟超; 钟金炫; 杨婷婷; 田开彪; 雷兴铃; 于朋辉
Original assignee: Shenzhen Yijia Smart Technology Co ltd
Current assignee: Shenzhen Yijia Smart Technology Co ltd
Priority date: 2021-09-16
Filing date: 2021-09-16
Publication date: 2022-02-01
Anticipated expiration: 2031-09-16

Abstract

The utility model discloses a lithium battery, which comprises a battery pack, a shell and a reinforcing frame, wherein the battery pack comprises a plurality of single batteries; the shell comprises a limit cavity matched with the battery pack, clamping pieces and a support bottom plate, wherein the clamping pieces and the support bottom plate are respectively arranged on the upper side and the lower side of the limit cavity; the reinforcing frame is erected on one side of the supporting bottom plate, which faces away from the limiting cavity; the plurality of single batteries are arranged in the limiting cavity and are sequentially stacked along the upper direction and the lower direction of the limiting cavity, and the clamping piece and the supporting base plate are respectively abutted to the upper side and the lower side of the battery pack. The technical scheme of the utility model improves the protection performance of the single battery and is beneficial to ensuring the power utilization safety of the battery.

Description

Lithium battery

Technical Field

The utility model relates to the technical field of battery energy storage, in particular to a lithium battery.

Background

A lead-acid battery is a storage battery with electrodes mainly made of lead and its oxides and electrolyte solution of sulfuric acid solution. The nominal voltage of a single-lattice lead-acid battery is 2.0V, and the battery can be discharged to 1.5V and charged to 2.4V; in application, 6 single-cell lead-acid batteries are often connected in series to form a lead-acid battery with a nominal 12V, 24V, 36V, 48V and the like.

The lithium iron phosphate battery is a lithium ion battery which uses lithium iron phosphate (LiFePO4) as an anode material and carbon as a cathode material, the rated voltage of a monomer is 3.2V, and the charge cut-off voltage is 3.6V-3.65V.

Because the discharge window voltages of the two batteries are different, the electrical properties of the lithium battery 4-string module and the lead-acid battery 6-string module are basically consistent, and the replacement requirements of use scenes can be met. In order to meet the replaceability of the appearance structure in the prior art, an ABS plastic shell with the same size as lead acid is usually adopted, the manufacturing cost of a product can be reduced, but along with the increase of the service time of a lithium iron phosphate battery, the battery core of the battery gradually expands, so that the ABS plastic shell with low use strength can cause the risk of spalling.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a lithium battery, and aims to solve the technical problem that the lithium battery in the prior art has low protection on a battery core.

In order to achieve the above object, the lithium battery provided by the present invention comprises a battery pack, a housing and a reinforcing frame, wherein the battery pack comprises a plurality of single batteries; the shell comprises a limit cavity matched with the battery pack, clamping pieces and a support bottom plate, wherein the clamping pieces and the support bottom plate are respectively arranged on the upper side and the lower side of the limit cavity; the reinforcing frame is erected on one side of the supporting bottom plate, which faces away from the limiting cavity; the plurality of single batteries are arranged in the limiting cavity and are sequentially stacked along the upper direction and the lower direction of the limiting cavity, and the clamping piece and the supporting base plate are respectively abutted to the upper side and the lower side of the battery pack.

Optionally, the single battery extends along the length direction of the support base plate, and the reinforcing frame includes a reinforcing rib having an extension component in the length direction of the support base plate.

Optionally, the number of the reinforcing ribs is at least two, and the at least two reinforcing ribs are arranged on the supporting bottom plate in parallel.

Optionally, the at least two reinforcing ribs are arranged at intervals, and the reinforcing frame further includes a connecting rib bridging the at least two reinforcing ribs.

Optionally, the reinforcing frame is detachably connected to the support base plate.

Optionally, the housing further includes two abutting plates, the two abutting plates are arranged on the left and right sides of the supporting base plate in parallel, and the inner sides of the two abutting plates abut against the left and right sides of the battery pack respectively.

Optionally, the shell further comprises a limiting frame arranged between the two abutting plates, and the limiting frame comprises two limiting surfaces which are respectively arranged on the front side and the rear side of the limiting cavity so as to abut against the battery pack.

Optionally, the inner side of the abutting plate is provided with a reinforcing rib having an extension component extending in the vertical direction.

Optionally, the housing is made of a metal material; and/or

The reinforcing frame is made of a metal material.

Optionally, the housing further includes an electric control chamber located at one side of the limiting chamber, and a BMS protection board located in the electric control chamber, and the BMS protection board is connected to the battery pack.

According to the lithium battery in the technical scheme, the clamping piece and the supporting bottom plate are arranged at the two ends of the expansion direction of the battery pack, so that the battery pack is pressed in the expansion direction of the battery pack based on the mutual matching of the clamping piece and the supporting bottom plate, and the protection performance of the battery pack is effectively improved; in addition, still through set up the reinforcement frame on supporting baseplate, like this, improved supporting baseplate's structural strength, guaranteed the reliability to the group battery protection.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

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

FIG. 2 is a schematic diagram of the lithium battery of FIG. 1 with a portion of the structure omitted;

FIG. 3 is a schematic diagram of the lithium battery of FIG. 1 with a portion of the structure omitted;

fig. 4 is a schematic view of the lithium battery shown in fig. 1 from another view angle.

The reference numbers illustrate:

1. a battery pack; 11. a single battery; 2. a housing; 21. a limiting cavity; 22. a butt joint plate; 221. reinforcing ribs; 23. a limiting frame; 24. an electrically controlled cavity; 25. a support base plate; 26. a clamping member; 3. reinforcing the frame; 31. reinforcing ribs; 32. connecting ribs; 4. BMS protection plate

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a lithium battery which can be applied to the fields of motor homes, outdoors, households and the like.

In the embodiment of the present invention, as shown in fig. 1 to 4, the lithium battery includes a battery pack 1, a housing 2, and a reinforcing frame 3, wherein the battery pack 1 includes a plurality of unit batteries 11; the shell 2 comprises a limit cavity 21 matched with the battery pack 1, clamping pieces 26 respectively arranged at the upper side and the lower side of the limit cavity 21 and a supporting bottom plate 25; the reinforcing frame 3 is arranged on one side of the supporting bottom plate 25 back to the limiting cavity 21; the plurality of single batteries 11 are arranged in the limiting cavity 21 and are sequentially stacked along the vertical direction of the limiting cavity 21, and the clamping piece 26 and the supporting bottom plate 25 are respectively abutted to the upper side and the lower side of the battery pack 1.

Specifically, in the present embodiment, the stacking direction of the unit cells 11 is the expansion direction of the unit cells 11.

It can be understood that, in the lithium battery of the technical solution of the present invention, the clamping member 26 and the supporting base plate 25 are disposed at two ends of the battery pack 1 in the expansion direction, so that the battery pack 1 is compressed in the expansion direction of the battery pack 1 based on the mutual cooperation of the clamping member 26 and the supporting base plate 25, thereby effectively improving the protection performance of the battery pack 1; in addition, still through set up reinforcing frame 3 on supporting baseplate 25, like this, improved supporting baseplate 25's structural strength, guaranteed the reliability of protecting group battery 1.

Alternatively, the unit cells 11 extend in the longitudinal direction of the support base plate 25, and the reinforcing frame 3 includes reinforcing ribs 31, the reinforcing ribs 31 having an extension component in the longitudinal direction of the support base plate 25. It can be understood that the reinforcing ribs 31 are used to improve the structural strength of the support base plate 25 in a wide range of embodiments, and have the advantages of simple implementation, reliable effect and the like. Meanwhile, the reinforcing ribs 31 have an extension component along the extension direction of the single battery 11, so that the supporting bottom plate 25 can be used for improving the abutting effect of the single battery 11. Preferably, the reinforcing ribs 31 extend in the length direction of the support base 25.

Optionally, at least two reinforcing ribs 31 are provided, and at least two reinforcing ribs 31 are provided in parallel on the support base plate 25. It will be appreciated that this arrangement is advantageous for the reinforcing frame 3 to further enhance the reinforcing effect on the support floor 25. It should be noted that the design of the present application is not limited thereto, and in other embodiments, at least two reinforcing ribs 31 may be disposed on the supporting base plate 25 in an intersecting connection manner.

Optionally, at least two reinforcing ribs 31 are provided at intervals, and the reinforcing frame 3 further includes a connecting rib 32 bridging the at least two reinforcing ribs 31. It will be appreciated that each reinforcing rib 31 is connected by a connecting rib 32 to improve the structural strength of the entire reinforcing frame 3.

Alternatively, the reinforcing frame 3 is detachably connected to the support base plate 25. So set up, the independent production of reinforcing frame 3 in industrial production of being convenient for on the one hand, on the other hand, the user of also being convenient for maintains and changes reinforcing frame 3. Specifically, the reinforcing frame 3 may be fixedly mounted on the supporting base plate 25 by means of screw fastening or the like, without limitation. It should be noted that the design of the present invention is not limited thereto, and in other embodiments, the reinforcing frame 3 may be integrally formed with the supporting base plate 25.

Optionally, the housing 2 further includes two abutting plates 22, the two abutting plates 22 are disposed in parallel on the left and right sides of the supporting base plate 25, and the inner sides of the two abutting plates 22 abut against the left and right sides of the battery pack 1, respectively. Specifically, in the present embodiment, the left and right sides of the support base plate 25 are both sides of the support base plate 25 itself in the longitudinal direction. It can be understood that, in the embodiment of the present application, the single batteries 11 are abutted not only on the upper and lower sides of the battery pack 1, but also on the left and right sides of the battery pack 1 (i.e., on the left and right sides of the single batteries 11), so that the expansion of the single batteries 11 is limited in multiple directions, which is beneficial to further improving the electrical safety of the battery pack 1.

Optionally, the housing 2 further includes a limiting frame 23 disposed between the two abutting plates 22, and the limiting frame 23 includes two limiting surfaces respectively disposed on the front and rear sides of the limiting cavity 21 to abut against the battery pack 1. It can be understood that, carry on spacingly through spacing frame 23 to group battery 1 inside shell 2, be favorable to avoiding group battery 1 to appear the position removal in shell 2, improved group battery 1's installation steadiness.

Optionally, the inner side of the abutment plate 22 is provided with a reinforcement rib 221, the reinforcement rib 221 having an extension component extending in the vertical direction. It can be understood that the reinforcing ribs 221 are used to increase the structural strength of the abutting plate 22, and therefore, the method has the advantages of simple implementation, reliable effect, and the like. Simultaneously, reinforcing rib 221 has the component of extending along vertical direction, so set up, is favorable to improving the butt effect of supporting baseplate 25 to battery cell 11. Preferably, the reinforcing ribs 221 extend in a vertical direction.

Alternatively, the housing 2 is made of a metal material; and/or the reinforcing frame 3 is made of a metal material. It can be understood that the structural stability of the case 2 or the reinforcing frame 3 supported by the metal material can be ensured more, which is advantageous to further improve the protection effect of the battery pack 1. Specifically, the housing 2 and the reinforcing frame 3 are both sheet metal members.

Optionally, the housing 2 further includes an electrical control chamber 24 located at one side of the limiting chamber 21, and a BMS protection plate 4 disposed in the electrical control chamber 24, and the BMS protection plate 4 is connected to the battery pack 1. It can be understood that the BMS protection board 4 has a BMS battery system thereon, which is mainly for intelligently managing and monitoring the states of the unit batteries 11 to prevent overcharge and overdischarge of the unit batteries 11, thereby effectively extending the service lives of the unit batteries 11.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A lithium battery, comprising:

a battery pack including a plurality of unit batteries;

the shell comprises a limit cavity matched with the battery pack, clamping pieces and a support bottom plate, wherein the clamping pieces and the support bottom plate are respectively arranged on the upper side and the lower side of the limit cavity; and

the reinforcing frame is arranged on one side, back to the limiting cavity, of the supporting bottom plate; wherein the content of the first and second substances,

the plurality of single batteries are arranged in the limiting cavity and are sequentially stacked along the upper direction and the lower direction of the limiting cavity, and the clamping piece and the supporting base plate are respectively abutted to the upper side and the lower side of the battery pack.

2. The lithium battery of claim 1, wherein the unit cells extend in a lengthwise direction of the support base, and the reinforcing frame includes reinforcing ribs having an extension component in the lengthwise direction of the support base.

3. The lithium battery of claim 2, wherein there are at least two of the ribs, and the at least two ribs are disposed in parallel on the support base.

4. The lithium battery of claim 3, wherein the at least two reinforcing ribs are spaced apart, the reinforcing frame further comprising a connecting rib bridging the at least two reinforcing ribs.

5. The lithium battery of any one of claims 1 to 4, wherein the reinforcing frame is detachably connected to the support base.

6. The lithium battery of claim 1, wherein the housing further comprises two abutting plates, the two abutting plates are arranged on the left and right sides of the supporting bottom plate in parallel, and the inner sides of the two abutting plates abut against the left and right sides of the battery pack, respectively.

7. The lithium battery of claim 6, wherein the housing further comprises a limiting frame disposed between the two abutting plates, the limiting frame comprising two limiting surfaces disposed on front and rear sides of the limiting cavity to abut against the battery pack.

8. A lithium battery as claimed in claim 6, characterized in that the abutment plate is provided on its inner side with a reinforcing rib having a component of extension extending in the vertical direction.

9. The lithium battery of claim 1, wherein the housing is made of a metallic material; and/or

The reinforcing frame is made of a metal material.

10. The lithium battery of claim 1, wherein the housing further comprises an electrical control chamber located to one side of the limiting chamber, and a BMS protection plate located in the electrical control chamber, the BMS protection plate being connected to the battery pack.