CN210110862U

CN210110862U - Lithium ion power battery pack

Info

Publication number: CN210110862U
Application number: CN201920217544.1U
Authority: CN
Inventors: 余嘉
Original assignee: Beijing Huanyu Dongfang Energy Technology Co Ltd
Current assignee: Beijing Huanyu Dongfang Energy Technology Co Ltd
Priority date: 2019-02-18
Filing date: 2019-02-18
Publication date: 2020-02-21
Anticipated expiration: 2029-02-18

Abstract

The utility model relates to a lithium ion power battery package, include: a battery cell; a tab protection mechanism disposed on at least one side of the battery cell; and the shell is positioned outside the battery unit and the lug protection mechanism, wherein the battery unit comprises batteries and heat conduction materials which are arranged in a spaced and laminated mode. The battery pack is high in heat dissipation efficiency, the weight of the battery pack is reduced due to the fact that the support, the cooling system and the cable are avoided, the structure is simple, manufacturing is convenient, production efficiency is high, and later-stage maintenance is facilitated.

Description

Lithium ion power battery pack

Technical Field

The utility model relates to an electric motor car battery field, concretely relates to lithium ion power battery package.

Background

The pure electric vehicle is one of strategic vehicle types of new energy vehicle industrialization in China, and people pay more and more attention to the pure electric vehicle. The power battery pack is used as the only power source of the pure electric vehicle, and plays a key role in ensuring normal and safe work of the battery pack.

At present, a power battery pack for a pure electric vehicle is manufactured by a plurality of single batteries in a plurality of series-parallel combination modes. However, the capacity of the battery required by the pure electric vehicle is large, so that a plurality of single batteries are required to be combined in series and parallel, the number of the single batteries is large, the size of the battery pack is large, and the heat dissipation is poor. Meanwhile, as the number of the single batteries is large, the required auxiliary materials are correspondingly increased, the combination process is complicated, and the production operation and the maintenance work are inconvenient.

Because batteries generate large heat and the temperature rises, most of battery packs on the market use a split type battery bracket to separate the batteries so as to facilitate the heat dissipation of the batteries or use a cooling system with cooling liquid to dissipate the heat. However, in any mode, the weight of the battery pack is inevitably increased, the energy density is reduced, and the loading electric quantity of the whole vehicle is influenced, so that the endurance mileage is influenced.

In addition, the battery pack on the market generally adopts a welding sampling line mode to sample battery data, but the welding sampling line mode has the disadvantages of large workload and low efficiency, and increases the difficulty of maintenance or repair.

SUMMERY OF THE UTILITY MODEL

In view of the problem that exists among the above-mentioned prior art, the utility model aims to provide a lithium ion power battery package has improved the radiating efficiency of battery package through setting up heat conduction material and battery with the range upon range of mode in interval to through setting up utmost point ear protection mechanism saved the space, avoided the use of traditional cable, improved the production efficiency of battery package and reduce the cost.

An aspect of the utility model provides a lithium ion power battery package, include:

a battery cell;

a tab protection mechanism disposed on at least one side of the battery cell; and

a housing located outside the battery cell and the tab protection mechanism,

wherein the battery unit comprises batteries and heat conducting materials which are arranged in a spaced and laminated mode.

Through a great deal of experiments and researches, the inventor of the application finds that the heat generated by the battery can be transferred to the outside of the battery pack through the heat conducting materials by arranging the battery and the heat conducting materials in a spaced and laminated mode, or the heat generated by the battery can be transferred to the battery when the battery needs to be heated through external heating. Thereby, a complex cooling system using cooling liquid is avoided, and at the same time, assembly and maintenance are simpler because no battery holder is used.

According to the utility model discloses, the heat conduction material can be selected from heat conduction silica gel, graphite alkene, carbon fiber, heat conduction metal etc..

In some preferred embodiments of the present invention, the housing includes an upper pressing plate located above the battery unit, a lower pressing plate located below the battery unit, and a protective baffle located around the battery unit; the upper pressing plate and the lower pressing plate are provided with clamping grooves, the protective baffle passes through the clamping grooves, the upper pressing plate and the lower pressing plate are connected, and the upper pressing plate and the lower pressing plate are connected and fastened through movable connecting guide blocks.

In some preferred embodiments of the present invention, the tab protection mechanism includes a tab support, and a stabilizing member.

In some preferred embodiments of the present invention, the tab holder is fixed on the fixing member and is connected and fastened to the upper pressing plate and the lower pressing plate through the movable connecting guide block.

According to the utility model discloses, utmost point ear support plays the effect of protection battery utmost point ear, simultaneously, because utmost point ear support fix on the steady piece and through mobilizable connection guide block and top board with the clamp plate is connected and is fastened down, has avoided other parts in the battery package direct extrusion battery or battery utmost point ear.

In some preferred embodiments of the present invention, the tab holder is provided with:

the lug inserting hole is used for supporting a battery lug of the battery;

a metal pad for welding the battery tab;

an electroplating circuit connected with the metal pad; and

and the data acquisition connecting port and the jack thereof are positioned at the other end of the electroplating circuit.

According to the utility model discloses, battery tab passes utmost point ear jack to 90 jiaos fifty percent discount parallel and level are on the metal pad, and weld battery tab on the metal pad with ultrasonic wave or laser. The metal pad is connected to the pin of the data acquisition line connection port through a plating circuit, and the data acquisition connection port is connected through technologies such as soldering.

According to the utility model discloses, be connected between battery and the battery and accomplish through the metal pad, both saved the space from this, avoided the use of cable again, alleviateed the weight of battery package.

According to the utility model discloses, adopt to electroplate the circuit and replaced traditional cable, both left out the wiring process of traditional technology, improved production efficiency and reduced manufacturing cost, reduced the whole weight of battery package again. In addition, the convenience of battery maintenance is also improved by arranging the electroplating circuit.

According to the utility model discloses, battery tab includes the positive electrode tab of battery and battery negative pole ear, and the positive electrode tab of battery and battery negative pole ear are crisscross to be established ties.

In some preferred embodiments of the present invention, at least one end of the heat conductive material is connected to at least one heat conductor.

In some preferred embodiments of the present invention, the heat conductor is a protective baffle.

In some preferred embodiments of the present invention, the lithium ion battery pack further comprises a conductive metal strip connected to a battery tab of the battery.

In some preferred embodiments of the present invention, the conductive metal tape has a multi-strand or porous lattice structure.

According to the utility model discloses, electrically conductive strap or its link are the same with the width of battery utmost point ear in size. The conductive metal strip can be arranged into a shape tightly attached to the surface of the battery according to the appearance characteristics of the battery pack.

According to the utility model discloses, electrically conductive strap can also be the solid body result. For the purpose of increasing the specific surface area of the conductive metal tape, improving the electron conductivity, and reducing the weight, the present invention preferably uses the conductive metal tape having a multi-strand or porous lattice structure.

In some preferred embodiments of the present invention, the lithium ion battery pack further includes a total anode copper bar, and the total anode copper bar includes a total anode copper bar and a total cathode copper bar.

According to the utility model, the traditional cable circuit is replaced by the conductive metal belt or the total copper bar, which is used for connecting the total anode, the total cathode and the external element of the battery, thereby saving the space, simplifying the structure of the battery pack and being beneficial to the manufacture and the maintenance of the battery pack; and the use of cables is avoided, and the weight of the battery pack is reduced.

According to the utility model discloses, can be with total anodal or total negative pole lug weld of battery on total utmost point copper bar, also can weld total anodal or total negative pole welding of battery on the conductive metal strip again on total utmost point copper bar earlier.

According to the present invention, the lithium ion battery pack further includes a buffer material disposed on the remaining sides of the battery unit where the tab protection mechanism is not disposed, and the buffer material is not limited in kind, and may be, for example, EVA foam (EVA is a short name for ethylene-vinyl acetate copolymer, whose english name is ethylene-vinyl acetate copolymer).

The utility model provides a battery package radiating efficiency is high, and because the use of having avoided support, cooling system and cable, has alleviateed the weight of battery package, simple structure, and the preparation is convenient, and production efficiency is higher, makes things convenient for the later stage to overhaul.

Drawings

Fig. 1 is a perspective view of a battery pack in example 1.

Fig. 2 is a schematic view of the structure of the battery used in example 1.

Fig. 3 is a schematic structural view of a tab holder used in example 1.

Fig. 4 is a schematic structural view of a battery used in example 2.

Fig. 5 is a schematic structural view of a tab holder used in example 2.

Description of reference numerals: 1-battery cell, 2-tab support, 21-tab receptacle, 22-metal pad, 24-receptacle, 3-case, 31-upper press plate, 32-lower press plate, 33-protective baffle, 4-total-tab copper bar, 5-module protective plate, 6-EVA foam, 221-tab receptacle, 222-metal pad, 223-electroplating circuit, 224-receptacle.

Detailed Description

The present invention will be described in detail below with reference to examples, but the scope of the present invention is not limited to the following description.

Example 1

As shown in fig. 1, a specific example of the lithium ion power battery pack of the present invention includes:

a battery unit 1 composed of batteries (not numbered, and a schematic structural diagram thereof is shown in fig. 2) and a heat-conductive silicone heat-conductive material (not numbered) which are arranged in a spaced-stacked manner;

two tab protection mechanisms (not numbered) provided on two sides of the left and right sides of the battery unit 1, the tab protection mechanisms including a tab support 2 and a stabilizing member (not shown), wherein, as shown in fig. 3, the tab support 2 is provided with: a tab insertion hole 21 for supporting a battery tab (not shown) of the battery 1, a metal pad 22 for welding the battery tab, a plating circuit 23 connected with the metal pad 22, and a data acquisition connection port and an insertion hole 24 thereof at the other end of the plating circuit 23;

the battery unit comprises a battery unit 1, a lug protection mechanism and a shell 3, wherein the shell comprises an upper pressing plate 31 positioned above the battery unit 1, a lower pressing plate 32 positioned below the battery unit 1 and a protection baffle 33 positioned at the periphery of the battery unit 1, the upper pressing plate 31 and the lower pressing plate 32 are provided with clamping grooves (not shown), the protection baffle 33 is connected with the upper pressing plate 31 and the lower pressing plate 32 through the clamping grooves, the upper pressing plate 31 and the lower pressing plate 32 are connected and fastened through movable connecting guide blocks (not shown), and in addition, the protection baffle 33 is connected with a heat conduction material; the tab support 2 is fixed on a steady piece (not shown) and is connected and fastened with the upper pressure plate 31 and the lower pressure plate 32 through a movable connecting guide block (not shown);

the general pole copper bar 4 is positioned on one side, far away from the battery unit 1, of the pole lug support 2;

the module protection plate 5 is positioned on the general pole copper bar 4 and is far away from the pole lug support 2; and

and the EVA foam 6 is positioned on the side of the battery unit 1 where the tab protection mechanism is not arranged and is next to the battery unit 1.

Example 2

The lithium ion power battery pack in this embodiment has all the components of the lithium ion power battery pack in embodiment 1, except that:

the battery 2 used has a structure shown in fig. 4, and correspondingly, a tab holder is structured as shown in fig. 5, wherein the tab holder is provided with: a tab insertion hole 221 for supporting a battery tab (not shown) of the battery 2, a metal pad 222 for welding the battery tab, a plating circuit 223 connected to the metal pad 222, and a data acquisition connection port and its insertion hole 224 at the other end of the plating circuit 223;

accordingly, since the battery tab in this embodiment is at one end of the battery, there is only one tab holder in this embodiment.

It should be noted that the above-mentioned embodiments are only used for explaining the present invention, and do not constitute any limitation to the present invention. The present invention has been described with reference to exemplary embodiments, but the words which have been used herein are words of description and illustration, rather than words of limitation. Modifications may be made to the invention as specified within the scope of the claims and modifications may be made without departing from the scope and spirit of the invention. Although the present invention has been described herein with reference to particular means, materials and embodiments, it is not intended to be limited to the particulars disclosed herein, but rather the present invention extends to all other methods and applications having the same functionality.

Claims

1. A lithium ion power battery pack, comprising:

a battery cell;

a housing located outside the battery cell and the tab protection mechanism,

2. The lithium ion power battery pack according to claim 1, wherein the housing comprises an upper platen above the battery cells, a lower platen below the battery cells, and a protective barrier around the battery cells; the upper pressing plate and the lower pressing plate are provided with clamping grooves, the protective baffle passes through the clamping grooves, the upper pressing plate and the lower pressing plate are connected, and the upper pressing plate and the lower pressing plate are connected and fastened through movable connecting guide blocks.

3. The lithium ion power battery pack of claim 2, wherein the tab protection mechanism comprises a tab support and a stabilizing member.

4. The lithium ion power battery pack as recited in claim 3, wherein the tab holder is fixed to the fixing member and is connected and fastened to the upper pressing plate and the lower pressing plate by a movable connecting guide.

5. The lithium ion power battery pack as claimed in claim 3, wherein the tab holder is provided with:

the lug inserting hole is used for supporting a battery lug of the battery;

a metal pad for welding the battery tab;

an electroplating circuit connected with the metal pad; and

6. The lithium ion power battery pack according to claim 1 or 2, wherein at least one end of the thermally conductive material is connected to at least one thermally conductive body.

7. The lithium ion power battery pack of claim 6, wherein the thermal conductor is a protective barrier.

8. The lithium ion power battery pack according to claim 1 or 2, further comprising a conductive metal strip connected to a battery tab of the battery.

9. The lithium ion power cell pack of claim 8, wherein the electrically conductive metal strip has a multi-stranded or porous mesh structure.

10. The lithium ion power battery pack according to claim 1 or 2, further comprising a total copper busbar, wherein the total copper busbar comprises a total positive copper busbar and a total negative copper busbar.