CN210110886U - Battery - Google Patents

Abstract

The application provides a battery pack, including battery module and the casing that is used for installing battery module, the casing inboard is provided with the setting element. The battery pack further includes a fixing member. The mounting sets up on the battery module, and with the setting element cooperation is fixed battery module and casing effectively reduce external vibration and impact right the influence of battery module improves the safety in utilization of battery module.

Description

Battery

technical field

The present application relates to a battery pack.

Background technique

At present, lithium batteries are widely used in electric vehicles. Since the electric vehicle has been subjected to vibration and shock during driving, the battery installed in the electric vehicle will also be subjected to corresponding vibration and shock. Vibration and shock have a great impact on the safe use of lithium battery modules, so the structure of lithium battery modules must have good stability.

Utility model content

In view of the above situation, it is necessary to provide a structurally stable battery pack.

A battery pack includes a battery module and a casing for installing the battery module, and a positioning member is arranged inside the casing. The battery pack also includes a fixing member. The fixing member is arranged on the battery module and cooperates with the positioning member to fix the battery module and the casing.

Preferably, the fixing member includes a first fixing portion, the first fixing portion is disposed on one side of the battery module, the positioning member includes a first positioning portion, and the first positioning portion is matched with the first positioning portion. a fixed part.

Preferably, the first fixing portion includes a first convex portion and a second convex portion that are oppositely disposed, the first positioning portion is disposed between the first convex portion and the second convex portion, and the first convex portion and the second convex portion are disposed. One side of the two protruding parts opposite to the first protruding part is a first fixing surface, and the first fixing surface supports the first positioning part.

Preferably, the fixing member further includes a second fixing portion, the second fixing portion is arranged on one side of the battery module, and the side of the second fixing portion away from the first fixing portion is the second fixing portion The positioning member includes a second positioning portion, and the second positioning portion supports the second fixing surface.

Preferably, the first fixing portion and the second fixing portion are provided between the first positioning portion and the second positioning portion.

Preferably, the battery module includes a plurality of battery cells and a first bracket for accommodating the battery cells, and the first fixing portion and the second fixing portion are arranged on the same side of the first bracket.

Preferably, the casing includes a first casing and a second casing, the first casing is fixed at an end of the second casing, and the positioning member is arranged in the second casing.

Preferably, the battery pack includes an end plate fixed on the side of the battery module and a first component disposed outside the first casing, the first component, the end plate and the first casing are all A through hole is provided, and the battery pack includes a bolt passing through the through hole to fix the first assembly, the end plate and the first case.

Preferably, the end plate is accommodated in the second casing, and an end of the end plate facing the first casing is provided with a protruding post, and the protruding post is provided with a through hole.

The battery pack includes a buffer member disposed between the first casing and the end plate and disposed in the second casing.

The above-mentioned battery pack cooperates with the positioning member in the casing through the fixing member to limit the movement of the battery module, effectively reduce the impact of external vibration and impact on the battery module, and improve the use safety of the battery module.

Description of drawings

FIG. 1 is a schematic structural diagram of a battery in an embodiment.

FIG. 2 is a schematic structural diagram of a battery module of the battery shown in FIG. 1 .

FIG. 3 is a schematic diagram of an exploded structure of the battery module shown in FIG. 2 .

FIG. 4 is an enlarged view of part III in FIG. 2 .

FIG. 5 is an enlarged view of part IV in FIG. 2 .

FIG. 6 is a schematic structural diagram of the battery module being loaded into the casing.

FIG. 7 is a front view of the battery module of FIG. 6 being installed in the casing.

FIG. 8 is an enlarged view of the portion of VIII in FIG. 6 .

FIG. 9 is an enlarged view of part IX in FIG. 6 .

FIG. 10 is a schematic structural diagram of the first end plate of the battery module of FIG. 2 .

FIG. 11 is a schematic structural diagram of the second end plate of the battery module of FIG. 2 .

Description of main component symbols:

Detailed ways:

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

Referring to FIG. 1 , FIG. 2 and FIG. 3 , the battery pack 100 includes a battery module 2 and a casing 1 for installing the battery module 2 . The battery module 2 includes a plurality of battery cells 20 , and the battery pack 100 further includes a casing 1 , an end plate, a fixing band 23 and a fixing member 24 .

The end plates include a first end plate 21 and a second end plate 22 , which are respectively disposed on both ends of the battery module 2 . The fixing belt 23 is sleeved on the battery module 2 and fixes the first end plate 21 and the second end plate 22 . The housing 1 is also provided with a positioning member, and the fixing member 24 is provided on the battery module 2 . When the battery module 2 is installed in the casing 1 , the fixing member 24 cooperates with the positioning member in the casing 1 to limit the movement of the battery module 2 .

Specifically, a plurality of the battery cells 20 are stacked together, and each of the battery cells 20 is accommodated in the first bracket 25 . The cell 20 is substantially rectangular, and the size of the first bracket 25 matches the size of the cell 20 . The first bracket 25 is substantially a hollow rectangular frame, and the first bracket 25 is fixed on the peripheral side of the battery core 20 . The fixing strips 23 are sleeved on the outer sides of the plurality of first brackets 25 along the direction parallel to the stacking of the battery cells 20 , so as to fix the plurality of battery cells 20 together and prevent the plurality of battery cells 20 from loosening. take off. The first end plate 21 and the second end plate 22 are respectively disposed on the end faces of the two outermost cells 20 of the battery module 2 . When the fixing belt 23 is sleeved on a plurality of the first brackets 25 , the first end plate 21 and the second end plate 22 are also fixed in the fixing belt 23 , and the first end plate 21 and the second end plate 22 are also fixed in the fixing belt 23 The plurality of battery cells 20 are pressed together under the action of the tension force of the battery, and the plurality of battery cells 20 are further fixed. The battery module 2 is also provided with an adapter plate 3 , and the adapter plate 3 is fixedly arranged on the short side of the first bracket 25 for electrically connecting the plurality of battery cells 20 .

The end of the long side of the first bracket 25 is further provided with a disengagement prevention member 28 , and the disengagement prevention member 28 is substantially an elastic piece. In one embodiment, the anti-dropping member 28 and the first bracket 25 are integrally formed. After the fixing straps 23 are sleeved on the plurality of first brackets 25 , the fixing straps 23 are pushed towards the anti-falling member 28 , so that the fixing straps 23 are partially inserted into the outer side of the first brackets 25 and all the brackets 25 . Between the inner sides of the anti-dropping members 28 , the anti-dropping members 28 restrict the movement of the fixing belt 23 , thereby preventing the fixing belt 23 from falling off from the end of the first bracket 25 . A spacer 26 is also provided between any adjacent cells 20 to provide expansion space for the cell 20 to expand. Specifically, in this embodiment, the spacer 26 is foam, and when the cell expands, the spacer 26 can be compressed . Spacers 26 are also disposed between the first end plate 21 and the battery cells 20 and between the second end plate 22 and the battery cells 20 .

The casing 1 includes a first casing 11, a second casing 12 and a third casing 13. The second casing 12 is roughly a hollow structure with two ends open. The third casings 13 are respectively disposed on both ends of the second casing 12 and encapsulate the second casing 12 . In other words, the first casing 11 and the third casing 13 serve as end caps for the second casing 12 . The battery module 2 is accommodated in the inner cavity of the second casing 12 . A buffer member 27 is disposed between the first end plate 21 and the first casing 11 and is disposed in the second casing 12 . A buffer member 27 is also provided between, to buffer the vibration of the battery module 2 in the casing 1 . The buffer member 27 is made of an elastic material, preferably a rubber pad. In other embodiments, the buffer member 27 can also be a flexible material such as foam, foamed silica gel, and sponge, which is not limited in this application. In one embodiment, the buffer member 27 is adhered to the surfaces of the first end plate 21 and the second end plate 22 facing away from the battery module 2. It can be understood that in other embodiments, the The buffer member 27 may also be fixed on the surfaces of the first casing 11 and the second casing 12 facing the battery module 2 .

Referring to FIGS. 3 to 6 , the fixing member 24 includes a first fixing portion 241 and a second fixing portion 242 , and the first fixing portion 241 and the second fixing portion 242 are arranged on the side of the battery module 2 . side, and the first fixing portion 241 and the second fixing portion 242 are spaced apart. The direction shown by the arrow in FIG. 6 is the direction X of entering the battery module 2 into the second casing 12 . In one embodiment, two sets of the first fixing parts 241 are symmetrically arranged on both sides of the battery module 2 , and two sets of the second fixing parts 242 are also symmetrically arranged on both sides of the battery module 2 In other embodiments, the first fixing portion 241 and the second fixing portion 242 may have one set respectively, which are arranged on different sides of the battery module 2 . The positioning member is disposed on the inner side wall of the second housing 12 , and the positioning member includes a first positioning portion 121 and a second positioning portion 122 , and the position of the first positioning portion 121 is the same as that of the first fixing portion. The position of the second positioning portion 122 corresponds to the position of the second fixing portion 242 .

Please continue to refer to FIG. 7 , FIG. 8 and FIG. 9 , the fixing member 24 is arranged on the long side of the first bracket 25 , and the first fixing portion 241 and the second fixing portion 242 are arranged on the The first bracket 25 is on the same side. Specifically, the first fixing portion 241 is disposed close to the adapter plate 3 , and the second fixing portion 242 is disposed at one end of the long side of the first bracket 25 away from the adapter plate 3 . The cross-section of the first fixing portion 241 is substantially “U” shaped, and includes a first protruding portion 2411 , a second protruding portion 2412 and a base 2413 , and the first protruding portion 2411 and the second protruding portion 2412 are opposite to each other. are disposed and protrude outward from both ends of the base 2413 respectively. The first positioning portion 121 is disposed between the first protruding portion 2411 and the second protruding portion 2412 and cooperates with the first fixing portion 241 . The side of the second convex portion 2412 facing the first convex portion 2411 is a first fixing surface 2414 , and the first fixing surface 2414 supports the first positioning portion 121 , that is, the first positioning portion 121 abuts against The first fixing surface 2414 is held to restrict the movement of the battery module 2 along the first direction. In this embodiment, the first direction refers to the direction shown by the Z axis in FIG. 1 .

The side wall of the second shell 12 has an inclined surface and a vertical surface, the inclined surface is close to the top surface of the second shell 12 , the first fixing part 241 and the first positioning part 121 is approximately located at the intersection of the inclined plane and the vertical plane, and the first convex portion 2411 is located above the second convex portion 2412, in order to ensure that the battery module 2 can be inserted into the second convex portion 2412 smoothly. In the case 12 , the length of the first protruding portion 2411 is smaller than the length of the second protruding portion 2412 . It can be understood that, in other embodiments, the length of the first protruding portion 2411 may be the same as the length of the second protruding portion 2412 , which is determined according to the actual shape of the housing 1 , which is not limited in this application.

The cross section of the second fixing portion 242 is substantially rectangular, and the side of the second fixing portion 242 away from the first fixing portion 241 is the second fixing surface 2421 , and the second positioning portion 122 supports or abuts against the second fixing surface 2421 . The second fixing surface 2421 is used to limit the movement of the battery module 2 in the second direction, that is, to limit the downward movement of the battery module 2 from the perspective of FIG. 6 . The second direction is opposite to the Z-axis direction in FIG. 1 . It can be understood that the second convex portion 2412 of the first fixing portion 241 and the second fixing portion 242 are disposed between the first positioning portion 121 and the second positioning portion 122, so as to restrict the battery mold The group 2 moves up and down in the second housing 12 . At the same time, since the two sides of the battery module 2 are provided with the fixing members 24, the symmetrical inner side walls of the second casing 12 are also provided with positioning members corresponding to the fixing members 24, thereby effectively reducing the Mechanical damage to the battery module 2 caused by external vibration and impact improves the use safety of the battery module 2 .

The fixing member 24 cooperates with the positioning member in the second casing 12 to limit the circumferential movement of the battery module 2 and also guide the insertion direction of the battery module 2 .

Please refer to FIG. 3 again, the lengths of the first fixing portion 241 and the second fixing portion 242 are the same as the side width of the single first bracket 25 , and the plurality of the first fixing portions 241 and the plurality of the The second fixing portions 242 are respectively spliced together with the stacking of the plurality of cells 20 to form the fixing member 24 . It can be understood that in other embodiments, the lengths of the first fixing portion 241 and the second fixing portion 242 may be the same as the length of the battery module 2 , and a single first fixing portion 241 and a single The second fixing portion 242 can be connected and fixed to the side edges of the plurality of first brackets 25 at the same time.

Referring to FIGS. 3 and 7 again, the first bracket 25 is further provided with a protruding portion 251 , and the protruding portion 251 is only provided on one side of the first bracket 25 . As mentioned above, the battery module 2 includes a plurality of stacked battery cells 20 and a first bracket 25, the battery cells 20 are arranged in the first bracket 25, and the protruding portion 251 is used to avoid the first bracket 25 is installed reversely during the stacking installation process, and is also used to prevent reverse welding of the installed battery module 2 and the adapter plate 3 during welding.

Please refer to FIG. 1 , FIG. 10 and FIG. 11 , both sides of the first end plate 21 are provided with first mounting portions 211 , and both sides of the second end plate 22 are provided with structures corresponding to the first mounting portions 211 . A similar second mount 221. The first mounting portion 211 and the second mounting portion 221 are substantially perpendicular to the end surfaces of the first end plate 21 and the second end plate 22 . The first mounting portion 211 and the second mounting portion 221 are provided with end plate nuts 29 , and the side walls of the second housing 12 are provided with through holes 124 corresponding to the end plate nuts 29 . In one embodiment, the end plate nut 29 is preferably a blind hole nut, and fasteners such as bolts and screws matched with the end plate nut 29 are screwed into the through hole 124 , and the end plate nut 29 is connected with the end plate nut 29 . Fixed connection, so that the first end plate 21 and the second end plate 22 are fixedly connected with the second housing 12 .

The top end of the inner cavity of the second housing 12 is further provided with a third positioning portion 123 , the first positioning portion 121 , the second positioning portion 122 and the third positioning portion 123 are all provided with mounting holes. The housing 11 and the third housing 13 are provided with bolts corresponding to the mounting holes for fixing the first housing 11 and the third housing 13 to the second housing 12 both ends of .

The battery pack 100 further includes a first component 111 , and the first component 111 is disposed on the surface of the first casing 11 facing away from the battery module 2 . The end surface of the first end plate 21 facing the first housing 11 is provided with a protruding post 212 , and a through hole (not marked) is provided on the protruding post 212 . The through hole 112 corresponding to the protruding post 212, the bolt passes through the first component 111 and the through hole 112 and is connected to the protruding post 212, so that the first component 111, the first housing 11 and the The three first end plates 21 are fixedly connected together. Positioning holes 113 are also defined on the first housing 11 , and positioning protrusions 114 are provided at both ends of the first component 111 . The positioning protrusions 114 are received in the positioning holes 113 to prevent the first Assembly 111 is displaced during installation.

The above embodiments are only used to illustrate the technical solutions of the present application rather than limitations. Although the present application has been described in detail with reference to the above preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present application can be modified or equivalently replaced. Neither should depart from the spirit and scope of the technical solutions of the present application.

Claims (10)

1. A battery pack, comprising:

a battery module; and

the shell is used for accommodating the battery module and is characterized in that a positioning piece is arranged on the inner side of the shell; the battery pack further includes:

and the fixing piece is arranged on the battery module and matched with the positioning piece to fix the battery module and the shell.

2. The battery pack according to claim 1, wherein the fixing member includes a first fixing portion provided at one side of the battery module, and the positioning member includes a first positioning portion engaged with the first fixing portion.

3. The battery pack according to claim 2, wherein the first fixing portion includes a first protrusion and a second protrusion, the first positioning portion is provided between the first protrusion and the second protrusion, a side of the second protrusion with respect to the first protrusion is a first fixing surface, and the first fixing surface supports the first positioning portion.

4. The battery pack according to claim 2, wherein the fixing member further includes a second fixing portion provided at a side of the battery module, a side of the second fixing portion facing away from the first fixing portion is a second fixing surface, and the positioning member includes a second positioning portion supporting the second fixing surface.

5. The battery pack according to claim 4, wherein the first fixing portion and the second fixing portion are provided between the first positioning portion and the second positioning portion.

6. The battery pack of claim 4, wherein the battery module comprises a plurality of battery cells and a first bracket for accommodating the battery cells, and the first fixing portion and the second fixing portion are disposed on the same side of the first bracket.

7. The battery pack according to claim 1, wherein the housing includes a first housing and a second housing, the first housing is fixed to an end of the second housing, and the positioning member is disposed in the second housing.

8. The battery pack according to claim 7, wherein the battery pack comprises an end plate fixed to a side of the battery module and a first member disposed outside a first case, wherein through holes are formed in the first member, the end plate and the first case, and the battery pack comprises bolts passing through the through holes to fix the first member, the end plate and the first case.

9. The battery pack according to claim 8, wherein the end plate is housed in the second case, and an end of the end plate facing the first case is provided with a boss provided with a through hole.

10. The battery of claim 9, wherein the battery includes a buffer disposed between the first casing and the end plate and within the second casing.

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