CN205429046U - Battery frame frame and battery frame frame subassembly and battery module - Google Patents

Abstract

The utility model relates to a battery field specifically, relates to a battery frame frame and battery frame frame subassembly and battery module. The utility model provides a battery frame frame subassembly includes frame main part and the curb plate that is located frame main part edge, the frame main part with the curb plate surrounds to form accepts the accommodating space of battery, is provided with at least one in the frame main part to keeping away from the shell fragment that the accommodating space direction is extended. The utility model provides a battery frame frame not only has the function of stationary battery, still provides good heat dispersion simultaneously, can also effectively compensate the inside fastening force variation of lithium ion battery dimensional change and module, alleviates the change that battery that electric core inflation caused piles up the direction load.

Description

A battery frame, a battery frame assembly, and a battery module

technical field

The present application relates to the battery field, in particular, to a battery frame, a battery frame assembly and a battery module.

Background technique

In recent years, the lithium-ion battery industry has developed rapidly, and its application fields have continued to expand. Especially with the rise of new energy vehicles, the capacity of lithium-ion batteries has become larger and their power has become higher and higher. The batteries contained in battery packs and modules The number of cores is also increasing, which poses a great challenge to the safety of battery modules. Two very important factors affecting the safety of battery modules are temperature and structure.

The batteries will generate heat during charging and discharging. If the heat generated by stacking many batteries cannot be dissipated in time, the temperature will continue to rise. If the temperature is too high, it will seriously affect the cycle life of the batteries. If it catches fire, the consequences will be unimaginable, which requires the design of the battery module to arrange a heat dissipation structure. In addition, as the charging and discharging progress, the battery cells continue to expand in the thickness direction, especially on soft packs and square batteries. The more batteries in the module, the greater the impact of battery expansion. If it is too large, it may affect the electrical performance of the battery, and even lead to the destruction of the module structure, resulting in serious consequences.

At present, there are not many patents and technical reports on the battery frame with heat dissipation and expansion compensation and the battery module including the frame. A lithium-ion battery module has been disclosed, with a heat conducting sheet sandwiched between every two cells to conduct heat to the cooling mechanism at the bottom of the module; in addition, a movable plate and an elastic element are provided at one end of the module to This absorbs the expansion of the cell. This technical solution has the following disadvantages: 1. The structure is complex, there are many parts, the requirements for manufacturing and installation process are very high, and the cost is high; The displacement of the cell closest to the elastic member is the sum of the displacements of all the cells, that is, if the displacement is too large, it may lead to unreliable tab connection.

In view of the defects in the prior art, this application is proposed.

Contents of the invention

The primary object of the invention of this application is to propose a battery frame.

The second invention of the present application aims to provide a battery module.

In order to complete the purpose of this application, the technical solution adopted is:

The present application relates to a battery frame, comprising a frame body and side plates located on the edge of the frame body, the frame body and the side plates are enclosed to form a storage space for storing batteries, and at least one The shrapnel extending in the direction of the accommodation space.

Preferably, the elastic piece includes an elastic bending part and a contact part, the elastic bending part connects the contact part and the frame main body, and an elastic gap is formed between the contact part and the frame main body.

Preferably, there are multiple elastic pieces, and the elastic gap formed between the contact portion of each elastic piece and the frame main body has the same size.

Preferably, the frame main body is provided with a through hole, and the elastic bending part is connected to one side of the through hole.

Preferably, the frame body is parallel to the contact portion.

Preferably, the receiving space has at least one opening for battery cells to be assembled in a direction parallel to the battery frame.

Preferably, installation holes are respectively provided on both sides of the end close to the opening on the frame main body.

Preferably, the side panels, the elastic pieces and the frame main body are integrated.

The present application also relates to a battery module, including the battery frame and the battery cell of the present application, wherein a backing plate is provided between the battery cell and the frame body, each of the battery frame, the pad The plate and the cells fixed in the battery frame form a battery module unit, and a plurality of the battery module units are arranged in sequence along the thickness direction of the cells.

In the battery module of the present application, the contact portion of the elastic piece in each battery module unit is fixedly connected to another battery module unit.

The beneficial technical effect that the technical scheme of the present application can achieve is:

1. Through the innovation and improvement of the traditional structure, the battery frame has the function of fixing the battery, and at the same time provides a good heat dissipation structure, which improves the service life of the battery and the structural safety of the module. By adding shrapnel to the traditional assembly structure, it can effectively compensate the size change of the lithium-ion battery and the change of the internal fastening force of the module, alleviate the change of the battery stacking direction load caused by the expansion of the battery cell, and improve the performance of the battery. The effect is obvious.

2. In this application, the expansion of each battery cell will be automatically absorbed by the shrapnel of its adjacent battery frame, and will not affect other batteries, which improves the reliability of the electrical connection and structure of the battery module.

3. The battery frame of the present application has simple structure, convenient processing and low production cost.

4. The battery modules of the present application are convenient for grouping and are suitable for automatic production.

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is the structural representation of the battery frame of the present application;

Fig. 2 is the side view of the battery frame of the present application;

Fig. 3 is the schematic diagram of the assembly of the battery frame and the battery cell of the present application;

Fig. 4 is a schematic diagram of the assembled battery frame and battery cells of the present application;

5 is a schematic diagram of the battery module of the present application;

Fig. 6 is a schematic diagram of a battery frame in a specific embodiment;

Fig. 7 is a schematic diagram of battery frame assembly in a specific embodiment;

in:

1- battery frame;

11 - frame body;

12 - mounting holes;

13 - shrapnel;

14 - side panels;

13 - shrapnel;

131 - elastic bending part;

132 - contact portion;

2-cell;

3-backing plate;

4- Air duct.

The present application will be further elaborated below in conjunction with specific embodiments. It should be understood that these examples are only used to illustrate the present application and are not intended to limit the scope of the present application.

detailed description

In this application, a battery frame 1 is proposed, which includes a frame body 11 and a side plate 14 located on the edge of the frame body 11. The frame body 11 and the side plate 14 are enclosed to form a storage space for accommodating the battery cell 2. The frame body 11 is provided with At least one elastic piece 13 extending away from the receiving space. The side panels 14 are preferably perpendicular to the frame body 11 . The side plate 14 can be only arranged on one side of the frame body 11, or only be arranged on two sides of the frame body 11, or be arranged on three sides of the frame body 11, or be arranged on four sides of the frame body 11. Both sides are set. Preferably, side plates 14 are provided on three sides of the frame body 11 , so as to form an opening in the receiving space for the battery cells 2 to be assembled in a direction parallel to the battery frame 11 .

During use, place the battery cells in the storage space. In order to strengthen the stability of the connection between the battery cells 2 and the battery frame 1, the battery cells 2 can be pasted on the frame main body 11, and the side plates located at the edge of the frame main body can be lifted. To improve the strength of the battery frame 1 and to position the cell 2. The battery frame has both heat dissipation and expansion compensation effects. Its structural schematic diagram is shown in Fig. 1 .

Preferably, the battery frame 1 is made of steel or aluminum alloy. The side plate 14, the elastic piece 13 and the frame main body 11 are integrated, and are preferably formed by direct stamping of a steel plate or an aluminum alloy plate. The elastic piece 13 includes an elastic bending portion 131 and a contact portion 132 , the elastic bending portion 131 connects the contact portion 132 and the frame body 11 , and an elastic gap is formed between the contact portion 132 and the frame body 11 . Preferably, the contact portion 132 is parallel to the frame body 11 , as shown in FIG. 2 .

Preferably, the angle formed between the elastic bending portion 131 and the frame main body 11 is 10°˜45°.

Furthermore, preferably, the frame body 11 is rectangular, the side plates 14 are provided on three sides of the frame body 11 , and the battery cell 2 is a plate-shaped secondary battery, so that the battery cell 2 is accommodated in the frame body 11 . Its schematic diagram is shown in Figure 3, and the schematic diagram after assembly is shown in Figure 4. Preferably, the elastic pieces 13 are arranged in a row along the length direction of the frame body 11 .

Preferably, there are multiple elastic pieces 13 , and the elastic gaps formed between the contact portion 132 of each elastic piece 13 and the frame main body 11 have the same size.

As mentioned above, the elastic piece 13 is preferably formed by stamping. Therefore, the frame body is provided with a through hole, and the elastic bending portion 131 is connected to one side of the through hole.

Preferably, the receiving space has at least one opening for assembling the battery cell 2 along a direction parallel to the battery frame 11 .

Preferably, mounting holes are respectively provided on both sides of the end of the frame body 11 close to the opening for mounting the battery pack busbar bracket.

In a specific embodiment of the present application, the frame body 11 is rectangular, the side plates 14 are arranged on three sides of the frame body 11, and the elastic pieces 13 are arranged in a row along the length direction of the frame body 11 on one side of the frame body. side. Its schematic diagram is shown in Figure 6. Two identical frame bodies are installed, and the assembled schematic diagram is shown in Figure 7.

In yet another specific embodiment of the present application, a battery module is proposed, including the aforementioned battery frame 1 and battery cells 2, a backing plate 3 is provided between the battery cells 2 and the frame main body 11, and each battery frame 11, backing plate 3 A battery module unit is formed with the battery cell 2 fixed in the battery frame, and a plurality of battery module units are arranged in sequence along the thickness direction of the battery cell. The battery module formed by stacking the battery module units forms a gap on one side with the elastic sheet, so that an air duct 4 is formed in the gap for heat dissipation of the battery. Its schematic diagram is shown in Figure 5.

Preferably, the backing plate 3 has insulation and heat conduction properties, is made of metal and has an insulating layer on its surface, and the backing plate 3 is adapted to the size of the battery core 2 .

Preferably, the contact portion 132 of the elastic sheet in each battery module unit is fixedly connected to another battery module unit.

Preferably, the contact portion 132 can be fixedly connected to the contact portion 132 of another battery module unit, or can be fixedly connected to the frame body 11 of another battery module unit, or can be fixedly connected to the cell surface of another battery module unit.

That is, there are several ways of arranging the battery module units as follows. One is that multiple battery module units with the same structure are connected sequentially with the side with the shrapnel in front and the side with the battery cell behind. The contact part is fixedly connected with the exposed surface of the battery core. The second is that the surfaces of the two battery module units with the shrapnel are facing each other. After being fixedly connected, the two battery module units fixed in pairs are closely attached with the exposed surfaces of the battery cells, and arranged in sequence. Among them, there are also two fixed installation methods between the two surfaces with the elastic pieces, one is the fixed connection of the contact parts of the elastic pieces, as shown in FIG. 5 . The other is that the fixing parts of the elastic pieces are respectively fixedly connected to the frame main body of another battery module unit, as shown in FIG. 7 .

When the two battery module units are squeezed by the battery expansion, the angle between the elastic bending part 131 and the contact part 132 of the elastic piece 13 also improves the elastic strength of the elastic piece 13, so that the battery module can withstand a larger pre-tightening force. An air duct 4 is formed where there is a battery frame shrapnel 13, and the heat generated by the battery during charging and discharging is conducted to the frame body 11 and the shrapnel 13 through the backing plate, and the cooling system in the battery pack makes cool wind blow through the air duct 4, so as to take away the heat and cool down the battery; when the battery expands, the battery frame is squeezed, and the shrapnel 13 will be elastically deformed accordingly, and the distance between the air ducts 4 between the battery module units becomes smaller, so the inside of the battery module The stress will not produce large changes, and the overall size of the module will not produce any changes. This structure achieves the purpose of heat dissipation and compensation for expansion, and the effect is good.

Example 1

A battery frame capable of dissipating heat and compensating for expansion, as shown in FIG. The side plate 14 and the spring piece 13 are directly stamped from the frame body 11. The side plate 14 is distributed on three sides of the frame body 11 and is perpendicular to the frame body 11 to form a storage room, where at least one battery cell can be placed.

As shown in FIG. 2 , the elastic piece 13 is divided into an elastic bending portion 131 and a contact portion 132 , the elastic bending portion 131 is at an angle of 10°-45° to the frame body 11 , and the contact portion 132 is parallel to the frame body 11 .

There are two installation holes 12 on the main body of the frame. The installation holes 12 are close to the end without side plate and distributed on both sides, and are used for installing and fixing the battery pack busbar bracket.

As shown in Figure 4, the battery 2 is placed in the storage room formed by the battery frame, with a backing plate 3 in the middle, the frame main body 1, the backing plate 3 and the battery 2 are fixed together and closely fitted to form a battery module unit. Figure 3 is a schematic diagram of the assembly.

A battery module, which is formed by arranging the above-mentioned plurality of battery module units in sequence along the thickness direction of the battery cell, and the battery module units are arranged in a back-to-back form, that is, the battery module units are fixedly connected by the contact portion 132 of the elastic sheet, and the battery module units The exposed surfaces of the battery cells are placed in close contact with each other. The two battery module units are fixed by welding at the position of the elastic piece contact portion 132 . As shown in Figure 5.

Example 2

Referring to FIG. 6 , the difference from Embodiment 1 is that the elastic sheet 2 on the battery frame 1 is narrower and located on one side of the frame main body 1 .

The corresponding module, as shown in FIG. 7 , when assembled, the two battery frames are matched back to back, and the shrapnel 13 of one battery frame 1 is fixedly connected to the frame body 11 of the other battery frame 1 . The battery module units composed of the battery frame 1 , the backing plate 3 and the battery 2 are sequentially arranged along the thickness direction of the battery cell, and other implementation methods are the same as in the first embodiment.

According to the disclosure and guidance of the above specification, those skilled in the art to which the present invention pertains can also make appropriate changes and modifications to the above embodiment. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the protection scope of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present invention.

Claims (10)

1. a battery frame, including chassis body and the side plate being positioned at described chassis body edge, described chassis body and described side plate surround and form the receiving space housing battery, it is characterised in that be provided with at least one in described chassis body to the shell fragment extended away from described receiving space direction.

Battery frame the most according to claim 1, it is characterised in that described shell fragment includes elastic bending part and contact site, described elastic bending part connects described contact site and described chassis body, forms elastic gap between described contact site and described chassis body.

Battery frame the most according to claim 2, it is characterised in that described shell fragment is multiple, and the size forming elastic gap between the contact site of each shell fragment with described chassis body is identical.

Battery frame the most according to claim 2, it is characterised in that described chassis body is provided with through hole, described elastic bending part is connected with a side of described through hole.

Battery frame the most according to claim 2, it is characterised in that described chassis body is parallel with described contact site.

Battery frame the most according to claim 1, it is characterised in that there is at least one for battery core on described receiving space along the opening with the assembling of described battery frame parallel direction.

7. according to the battery frame described in claim 6 any claim, it is characterised in that the both sides of one end of the close described opening in described chassis body are respectively provided with installing hole.

Battery frame the most according to claim 1, it is characterised in that described side plate, described shell fragment and described chassis body are integrated setting.

9. a battery module, including the battery frame described in claim 1～8 any claim and battery core, it is characterized in that, it is provided with backing plate between described battery core and described chassis body, each described battery frame, described backing plate and the battery core being fixed in described battery frame form a battery module unit, and multiple described battery module unit are arranged successively along battery core thickness direction.

Battery module the most according to claim 9, it is characterised in that in each described battery module unit, the contact site of shell fragment is all fixing with another battery module unit is connected.