CN104900939B - Lithium ion battery pack - Google Patents

Abstract

The invention provides a lithium ion battery pack. Including: water cooling box, switch box, battery pack lower box, water cooling plate, battery module and battery pack upper cover; the water cooling plate is located at the bottom of the battery pack lower box; the battery module is set on the water cooling plate; the battery pack The cover is located on the battery module and fits with the lower box of the battery pack to form a closed box. The water cooling plate and the battery module are accommodated in the box; the switch box and the water cooling box are arranged outside the lower box of the battery pack , The bottom of the lower box of the battery pack. The lower box of the battery pack is provided with high and low voltage connectors connected with the high and low voltage connecting lines of the battery module; A connector and a second connector connected to the external circuit; a liquid inlet and a liquid outlet are arranged in the water cooling box. The lithium-ion battery pack of this embodiment can increase the energy density of the battery pack in the case of an equal space volume, and provide stable and safe battery life for new energy vehicles.

Description

Li-ion battery pack

technical field

The invention relates to the technical field of lithium-ion batteries, in particular to a lithium-ion battery pack.

Background technique

At present, with the rapid development of the new energy vehicle industry, how to improve the stable and safe battery life of new energy vehicles has attracted more and more attention. Among the existing power batteries for new energy vehicles, lithium-ion batteries have relatively low production costs, can be recharged repeatedly, and are very convenient to use. Compared with other portable energy sources, lithium-ion batteries have a higher cost advantage.

In the prior art, the interior of the lithium-ion battery pack not only includes the battery module, but also includes a switch box composed of electrical components such as a battery management system, a relay, and a fuse. The switch box is an integral part of the operation of the Li-ion battery pack. The battery management system in the switch box is used to manage the battery module, and the sampling harness of the battery module needs to be connected to the battery management system to ensure the normal operation of the lithium-ion battery pack. Both relays and fuses can be used to keep the circuit safe when Li-ion batteries are operating. In view of the importance of the switch box, it is necessary to provide a separate space inside the lithium-ion battery pack for setting the switch box. At the same time, the battery module in the lithium-ion battery pack will generate heat during operation, which will affect the performance of the lithium-ion battery, and in severe cases, even cause the lithium-ion battery pack to be scrapped. Therefore, in order to ensure the normal operation of the lithium-ion battery pack and prolong its service life, it is usually necessary to install a water-cooling box and a water-cooling plate in the lithium-ion battery pack. The water-cooling plate can be installed near the battery module. The water-cooling box is connected to the water-cooling system of the vehicle through the liquid inlet and outlet, and communicates with the flow channel in the water-cooling plate, so as to take away the heat and realize the cooling of the water-cooling plate, thereby ensuring the battery module. Work at a suitable temperature.

Based on the above, the lithium electronic battery pack in the prior art is not only provided with a switch box, but also provided with a water cooling box, which takes up a large space when the same amount of power is provided, resulting in a relatively low energy density of the lithium electronic battery pack. Small.

Contents of the invention

The invention provides a lithium-ion battery pack, comprising: a water cooling box, a switch box, a battery pack lower box, a water cooling plate, a battery module, and a battery pack upper cover;

Wherein the water cooling plate is located at the bottom of the lower box of the battery pack; the battery module is arranged on the water cooling plate; the battery pack upper cover is located on the battery module and connected to the battery The lower box can be matched to form a closed box, and the water cooling plate and the battery module are accommodated in the box;

The switch box and the water cooling box are arranged outside the lower box of the battery pack and at the bottom of the lower box of the battery pack; the lower box of the battery pack is provided with high and low voltage The high and low voltage connectors connected by connecting wires; the first connector is arranged in the switch box, and the first connector can be connected with the high and low voltage connectors by plugging; the switch box is also The second connector connected to the external circuit is integrated; the water cooling box is provided with a liquid inlet and a liquid outlet, and the flow channel inlet and flow channel outlet provided in the water cooling plate pass through the lower box of the battery pack The bottom part enters the water cooling box and is respectively connected with the liquid inlet and the liquid outlet.

Further, the above-mentioned lithium-ion battery pack also includes a wire harness protection lower cover and a wire harness protection upper cover; the wire harness protection lower cover is sleeved around the battery module, and the wire harness protection lower cover is provided with a low-voltage wire harness routing channel and a hole for fixing the binding wire of the low-voltage wire harness, the low-voltage wire harness is led out from the battery module; the wire harness protection upper cover is buckled with the wire harness protection lower cover, so as to surround the low-voltage wire harness in the wire harness Protect the inside of the lower cover.

Further, in the above lithium-ion battery pack, at least two module pressing plates are arranged on the two opposite end plates between the battery modules.

Further, the above-mentioned lithium-ion battery pack, wherein the module pressing plate includes a bottom plate and a support plate, the support plate is perpendicular to the bottom plate and is arranged on the side of the bottom plate; it is located in the middle of the battery module, The support plates of the two adjacent module pressing plates are integrated, and the bottom plates of the two adjacent module pressing plates are on the same plane, forming an integral module pressing plate.

Further, in the above lithium-ion battery pack, wherein the two ends of the bottom plate of the module pressing plate are respectively provided with fixing holes, and the fixing parts are used to press the module pressing plate tightly through the fixing holes at both ends of the bottom plate. corresponding to the two end plates.

Further, the above-mentioned lithium-ion battery pack, wherein the integral module pressing plate is provided with a cylindrical structure to support the upper cover of the battery pack; the cylindrical structure is perpendicular to the bottom plate and pressed against the support plate above.

Further, the above-mentioned lithium-ion battery pack, wherein holes are provided in the cylindrical structure, through holes are provided on the upper cover of the battery pack, and studs are used to pass through the through holes and the holes, and the The upper cover of the battery pack is fixed together with the cylindrical structure.

Furthermore, in the above lithium-ion battery pack, the lower case of the battery pack and the upper cover of the battery pack are both provided with a flange structure.

Further, the above-mentioned lithium-ion battery pack, wherein the flange structure of the lower box of the battery pack and the flange structure of the upper cover of the battery pack are provided with openings, and bolts and nuts are used to pass through the lower box of the battery pack. The openings on the flange structure of the battery pack and the openings on the flange structure of the battery pack upper cover fix the battery pack lower case and the battery pack upper cover together.

Further, the above-mentioned lithium-ion battery pack, wherein when the lithium-ion battery pack includes at least two water-cooled plates, the water-cooled box is provided with a flow divider for cooling the cooling liquid flowing into the liquid inlet. shunt.

The lithium-ion battery pack of the present invention saves the space inside the battery pack by placing the switch box and the water cooling box in the battery pack outside the battery pack, and realizes the improvement of the energy density of the battery pack under the condition of equal space and volume, thereby It can provide stable and safe battery life for new energy vehicles.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

Fig. 1 is the structural exploded diagram of embodiment one of lithium-ion battery pack of the present invention;

Fig. 2 is another structural diagram of the lithium-ion battery pack shown in Fig. 1;

Fig. 3 is the structural exploded diagram of embodiment two of the lithium-ion battery pack of the present invention;

FIG. 4 is a schematic diagram of an enlarged structure of the battery module in FIG. 3;

FIG. 5 is an enlarged structural schematic diagram of the integral module pressing plate in FIG. 3 .

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

FIG. 1 is an exploded view of the structure of Embodiment 1 of the lithium-ion battery pack of the present invention. FIG. 2 is another structural diagram of the lithium-ion battery pack shown in FIG. 1 . As shown in FIG. 1 , the lithium-ion battery pack of this embodiment includes: a water cooling box 1 , a switch box 2 , a battery pack lower box 3 , a water cooling plate 4 , a battery module 5 and a battery pack upper cover 6 .

As shown in Figure 1, the water-cooled plate 4 is located at the bottom of the battery pack lower box 3, the battery module 5 is arranged on the water-cooled plate 4, the battery pack upper cover 6 is located on the battery module 5, and is connected to the lower battery pack. The boxes 3 can be fitted together to form a closed box in which the water cooling plate 4 and the battery module 5 are accommodated. Specifically, FIG. 2 is a state diagram of the assembled lithium-ion battery pack shown in FIG. 1 . As shown in Figure 2, after the water cooling plate 4 and the battery module 5 are placed in the battery pack lower box 3, the battery pack upper cover 6 is located on the battery module 5, and the battery pack upper cover 6 can be connected with the battery pack lower box. Body 3 coincides to form a closed box as shown in Figure 2. The lower case 3 of the battery pack bears the weight of the entire battery pack, and can be manufactured by bending and welding sheet metal parts, stamping and welding sheet metal parts, or aluminum alloy casting, or aluminum alloy die-casting. Specifically, as shown in Figure 1, the battery modules 5 in the lithium-ion battery pack of this embodiment are placed flat on the water-cooled plate 4, and the number of battery modules 5 specifically placed in the lithium-ion battery pack is the same as that of the battery pack. The size of the lower case 3 is related, and the larger the size of the lower case 3 of the battery pack, the more battery modules are placed. As shown in Figure 1, the technical solution of the present invention is described by taking eight battery modules 5 as an example, wherein four battery modules 5 are placed on a water-cooled plate 4 as a group of battery modules, and the other four battery modules 5 is placed on another water-cooled plate 4 as another group of battery modules; the 4 battery modules 5 on each water-cooled plate 4 are adjacent to each other and placed side by side; and the 4 batteries on another water-cooled plate 4 The modules are opposite to each other; and there is a certain gap between the two groups of battery modules 5 .

Among them, the water-cooled plate 4 can be set in one or more pieces according to the design of the battery module 5, and it is necessary to ensure that each cell in the battery module 5 can be in contact with the water-cooled plate 4 to be cooled by the water-cooled plate 4. In Fig. 1, two water-cooled plates 4 are taken as an example. The water-cooled plate 4 is in close contact with the cooling interface of the battery module 5. When the coolant enters the water-cooled plate 4, it takes away the heat inside the lithium-ion battery pack after passing through a certain flow channel, so that the water-cooled plate 4 can be guaranteed to the greatest extent. The heat dissipation effect of the battery module 5 enables the temperature of the battery module 5 to be kept at an appropriate temperature to achieve its best functional performance. In addition, the layout of the flow channels in the water cooling plate 4 can be changed according to actual needs.

As shown in Figures 1 and 2, the switch box 2 and the water cooling box 1 in this embodiment are arranged outside the box and at the bottom of the lower box 3 of the battery pack; the lower box 3 of the battery pack is provided with a battery module 5 The high and low voltage connectors connected with the high and low voltage connecting wires, for example, specifically, the high and low voltage connectors can be arranged at the bottom of the lower case 3 of the battery pack, close to the position where the switch box 2 is installed. The switch box 2 is provided with a first connector, and the first connector can be connected with the high and low voltage connectors on the lower box body 3 of the battery pack by plugging. Specifically, in order to facilitate the connection of the high and low voltage connectors provided on the lower case 3 of the battery pack with the first connector in the switch box 2, the high and low voltage connectors may be specifically arranged at the bottom of the lower case 3 of the battery pack. The outer surface (that is, the surface on which the switch box 2 is installed) is close to the position of the switch box 2 . In this way, when in use, the first connector can be directly connected to the high and low voltage connectors through plugging. Moreover, a second connector connected to the outside is also integrated in the switch box 2 , and the second connector is also connected to the external circuit through plugging, so as to realize charging and discharging of the battery cells in the battery module 5 . The line between the second connector and the first connector realizes the connection between the external line and the high and low voltage connecting lines of the battery module 5 . In this embodiment, the second connector is connected to the external line by plugging, and the first connector is connected to the high and low voltage connectors arranged at the bottom of the lower box body 3 of the battery pack through plugging, so as to realize the connection between the external line and the battery module 5. The connection of high and low voltage lines is very convenient and safe to use.

Further, the water cooling box 1 of this embodiment is provided with a liquid inlet and a liquid outlet, and the flow channel inlet and flow channel outlet provided in the water cooling plate 4 pass through the bottom of the lower box body 3 of the battery pack, enter the water cooling box 1, and Connect with the liquid inlet and the liquid outlet of the water cooling box 1 respectively.

The water cooling box 1 of this embodiment can be in the shape of a closed box or a box without a cover. It is arranged outside the box and at the bottom of the lower box 3 of the battery pack, and is fixed to the lower box 3 of the battery pack by fixing parts. The liquid inlet and liquid outlet in the water cooling box 1 are respectively connected to the refrigeration system of the whole vehicle, the liquid inlet of the water cooling box 1 is connected to the cooling liquid from the refrigeration system of the whole vehicle, and then the cooling liquid is passed through the flow channel of the water cooling plate 4 The inlet flows into the water-cooled plate 4. Since the water-cooled plate 4 is closely attached to the battery module 5, the coolant flowing into the water-cooled plate 4 can take away the heat generated by the battery module 5 during operation, and the coolant that takes away the heat passes through the The outlet of the flow channel of the water-cooling plate 4 is connected to the liquid outlet of the water-cooling box 1 , and then returned to the refrigeration system of the vehicle, so that the water-cooling plate 4 cools down the battery module 5 . The water cooling box 1 can be fixed on the outside of the box body 1 and the bottom of the box body 1 under the battery pack through a fixing assembly. When the water cooling box 1 is a box body without a cover, in order to ensure the airtightness of the water cooling box 1, the area where the water cooling box 1 contacts the bottom of the battery pack lower box body 1 can be provided with a sealing strip or a sealed rubber plate to ensure that the water cooling box 1 Excellent waterproof and dustproof. Moreover, in order to facilitate the fixing of the water-cooling box 1 , the opening of the box body of the water-cooling box 1 can be configured as a flange structure.

As shown in Figure 1, the switch box 2 of this embodiment can be in the shape of a closed box or a box without a cover. It is arranged at the bottom of the lower box body 3 of the battery pack, and is fixed to the lower box body 3 of the battery pack by a fixing member. , which can be integrated with battery control system, relays, fuses, connectors and other electrical components to control the switching, charging and discharging functions of the entire battery pack. Wherein, the connectors in this embodiment may include a first connector matched with the high and low voltage connectors drawn from the battery module 5 inside the battery pack, and a second connector connected with the external circuit. Through the connection form of the connector, it is convenient to maintain and replace the electrical components in the switch box, the structure is compact, and the assembly is convenient. When the switch box 2 is in the shape of a box without a cover, a sealing rubber strip or a sealed rubber plate can also be added at the place in contact with the lower box body 3 of the battery pack, thereby further ensuring the waterproof and dustproof performance of the switch box 2 . Moreover, in order to facilitate the fixing of the switch box 2, the opening of the box body of the switch box 2 can be set as a flange structure.

The lithium electronic battery pack of this embodiment, by placing the switch box and the water cooling box in the lithium electronic battery pack in the prior art on the outside of the battery pack, realizes the improvement of the integration degree in the battery pack while providing the same amount of power. It solves the problem that a separate space needs to be provided for the switch box inside the battery pack, which will reduce the integration level and affect the energy density of the battery pack. Therefore, the technical solution of this embodiment can improve the energy density of the battery pack in the case of equal space and volume, and can provide stable and safe battery life for new energy vehicles; It is convenient for the maintenance of the switch box and the water-cooling box; especially the frequently-maintained components such as connectors and fuses in the switch box, during maintenance, it is not necessary to open the entire lithium-ion battery pack, and the maintenance can be realized by only opening the switch box, which is very convenient to use .

Fig. 3 is an exploded view of the structure of the second embodiment of the lithium-ion battery pack of the present invention. As shown in FIG. 3 , the lithium-ion battery pack of this embodiment may further include the following technical solutions on the basis of the first embodiment above.

As shown in Figure 3, the lithium-ion battery pack of this embodiment also includes a wire harness protection lower cover 7 and a wire harness protection upper cover 8; the wire harness protection lower cover 7 is set around the battery module 5, and the wire harness protection lower cover 7 is provided There are low-voltage wire harness routing channels and holes for fixing low-voltage wire harness binding wires. The low-voltage wire harness is led out from the battery module 5; Inside the lower cover.

FIG. 4 is an enlarged structural schematic diagram of the battery module in FIG. 3 . As shown in Figure 4, the battery module 5 includes a module end plate 5-1, a low-voltage wire harness outlet port 5-2, a module upper cover 5-3, a module bottom plate 5-4, and a module side plate 5-5. A plurality of battery cells can be arranged inside the battery module 5 . As shown in FIG. 3 , the technical solution of the present invention is described by taking the overall structure of the battery module composed of 8 battery modules 5 as an example. In practical applications, the number of battery modules 5 included in the overall structure of the battery module can be set according to requirements. As shown in Figure 3, the size of the wire harness protection lower cover 7 corresponds to the size of the overall structure of the battery module. The groove corresponding to the lead-out buckle enables the wire harness protection lower cover 7 to be accurately buckled on the overall structure of the battery module. A low-voltage wire harness routing channel is also provided in the wire harness protection lower cover 7, which is used to place the low-voltage wire harness drawn from the low-voltage wire harness lead-out buckle in the low-voltage wire harness routing channel, so that the low-voltage wire harness can be arranged neatly in a certain direction. The wire harness protection lower cover 7 is also provided with a hole for fixing the low-voltage wire harness binding wires, which is used to bind the low-voltage wire harnesses arranged in the low-voltage wire harness passageway, so as to play a fixed role and prevent the low-voltage wire harness from changing its position.

As shown in Figure 3, the size of the wire harness protection upper cover 8 corresponds to the size of the wire harness protection lower cover 7, and the two can be connected by a buckle. When the low-voltage wire harness in the wire harness protection lower cover 7 is fixed, the wire harness The upper protection cover 8 is buckled on the lower protection cover 7 of the wire harness to enclose the low-voltage wire harness in the lower protection cover 7 of the wire harness to form a sealing structure, which enhances sealing and safety. A sealing structure can also be added at the place where the wire harness protection lower cover 7 and the wire harness protection upper cover 8 are fastened, and the sealing structure can be a sealing rubber strip, thereby further ensuring the waterproof and dustproof performance of the wire harness protection cover.

In this embodiment, the lithium-ion battery pack arranges the low-voltage wire harnesses drawn out of the battery module by arranging the wire harness protection upper cover and the wire harness protection lower cover around the battery module group, and leads them to the high-voltage wire harness on the lower box of the battery pack. , Low-voltage connectors. The high-voltage wire harness is led out to the high and low voltage connectors of the lower box of the battery pack through the wire harness between the battery modules or the copper bar; the high and low voltage connectors are connected to the first plug in the switch box, so as to solve the The internal wiring is complicated and numerous, and the problem of mutual interference.

Further optionally, as shown in FIG. 3, in the lithium-ion battery pack of this embodiment, at least two Module pressing plate 9. The module pressure plate includes a bottom plate 10 and a support plate 11, the support plate 11 is perpendicular to the bottom plate 10, and is arranged on the side of the bottom plate 10; wherein the support plates of the two adjacent module pressure plates 9 in the middle of the battery module 5 11 are set together to form an integral module pressing plate. FIG. 5 is an enlarged structural schematic diagram of the integral module pressing plate in FIG. 3 . As shown in Figure 5, the integral module pressing plate includes two module pressing plates 9, the support plates 11 of the two module pressing plates 9 are set as one, and the bottom plates 10 of the two module pressing plates 9 are respectively located on the two sides of the supporting plate 11. side, and perpendicular to the support plate 11 respectively.

Since the module pressing plate 9 is arranged on the two opposite battery module end plates, it is used to press down the relative two relative battery modules 5, therefore, as shown in Figure 4, in order to facilitate the The fixed module pressing plate 9 is respectively provided with fixing holes S at both ends of the base plate 10 of the module pressing plate 9, as shown in FIG. The module pressing plate 9 is pressed against the corresponding two end plates through the fixing holes S at both ends of the bottom plate 10 by means of fixing components.

Further optionally, as shown in FIG. 5 , a cylindrical structure 12 is provided on the integral module pressing plate to support the upper cover of the battery pack. When the assembly is completed, when the battery pack upper cover 6 and the battery pack lower case 3 are covered together, the cylindrical structure 12 can just support the battery pack upper cover 6 in the middle of the battery pack upper cover, preventing the battery pack upper cover 6 from Deforms when pressed down. As shown in FIG. 5 , the cylindrical structure 12 is perpendicular to the bottom plate 10 and pressed on the supporting plate 11 .

It should be noted that, and as shown in Figure 4, since the battery module 5 is provided with a low-voltage wire harness lead-out port 5-2, in order to facilitate the regulation of the low-voltage wire harnesses drawn out of all the low-voltage wire harness lead-out buckles, it is necessary to protect the upper cover of the wire harness 8 and the wire harness protection lower cover 7, corresponding to the position of the low-voltage wire harness outlet port 5-2 in the battery module 5, there are also low-voltage wire harness routing channels and holes for fixing the low-voltage wire harness binding wires, so as to realize all low-voltage wire harnesses The regularity of the wiring harness. Moreover, there is a hole reserved between the wire harness protection upper cover 8 and the wire harness protection lower cover 7 for the cylindrical structure 12 to pass through, so that the cylindrical structure 12 can pass through the hole and be fixed to the battery pack upper cover 6 .

Further optionally, in order to ensure that the battery pack lower box 3 and the battery pack upper cover 6 can form a closed box, the battery pack lower box 3 and the battery pack upper cover 6 can be riveted together by setting rivets, or can The buckle is set to connect the battery pack lower box body 3 and the battery pack upper cover 6 together; or other connection methods can also be used to connect the two together. Or in order to facilitate installation, in this embodiment, both the lower box body 3 of the battery pack and the upper cover 6 of the battery pack can be provided with a flanging structure, which can ensure the tightness of the lower box body 3 of the battery pack and the upper cover 6 of the battery pack. The fit further enhances the sealing and safety of the box.

Further optionally, in order to ensure the firmness of the connection between the battery pack lower case 3 and the battery pack upper cover 6, both the flange structure of the battery pack lower case 3 and the flange structure of the battery pack upper cover 6 may be provided with Open the hole, use bolts and nuts to pass through the openings on the flange structure of the battery pack lower case 3 and the openings on the flange structure of the battery pack upper cover 6, and connect the battery pack lower case 3 and the battery pack upper cover 6 fixed together. Further optionally, in order to ensure the tightness of the entire box body, a sealing structure can also be provided between the flange structure of the battery pack lower case body 3 and the flange structure of the battery pack upper cover 6, for example, the sealing structure can be a sealing structure. Rubber strips to further ensure the sealing and waterproof and dustproof performance of the battery pack. In addition, the top cover of the battery pack can adopt different surface textures and processes according to the stress and usage conditions.

Further optionally, when the lithium-ion battery pack includes at least two water-cooled plates 4, a flow divider may be provided in the water-cooled box 1 to divide the flow of the cooling liquid flowing into the liquid inlet. Specifically, the flow divider will flow from The water-cooling liquid drawn from the vehicle refrigeration system is divided into two streams, which enter the water-cooling plate 4 from the flow channel inlets of the two water-cooling plates 4 respectively; Flow out from the outlets of the two flow channels of the two water-cooling plates 4 respectively, then meet in the water-cooling box 1, and return to the cooling system of the vehicle, thereby ensuring the heat dissipation of the battery module 5 and enabling it to maintain a balanced temperature down to work. When the lithium-ion battery pack includes multiple water-cooling plates 4 , the splitter provided in the water-cooling box 1 corresponds to dividing the cooling liquid into multiple strands. The principle is similar and will not be repeated here.

In Fig. 3, the technical solution of the present invention is described by including all the above-mentioned optional technical features as an example. In practical applications, all the above-mentioned optional technical features can be combined arbitrarily and combined with the technology of the above-mentioned embodiment shown in Fig. 1 The solution constitutes an optional embodiment of the present invention, and will not be described here one by one.

The lithium-ion battery pack in this embodiment improves the stability of the internal structure of the lithium-ion battery pack by adding structures such as a module pressing plate and a flange, and can also improve the strength of the battery pack and the battery pack in the case of an equal space volume. Energy density, while enhancing the safety and water and dust resistance of lithium-ion battery packs. It solves the problem of low energy density of battery packs in the prior art with medium space volume, and can provide stable and safe battery life for new energy vehicles at the same time.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims (8)

1. A kind of 1. lithium ion battery bag, it is characterised in that including：Water cooling box, switch enclosure, battery bag lower box, cooled plate, battery Covered in module and battery bag；

   Wherein described cooled plate is located at the bottom of the battery bag lower box；The battery modules be arranged on the cooled plate it On；Lid is on the battery modules in the battery bag, and can be matched with the battery bag lower box, forms one The casing of closing, the cooled plate and the battery modules are contained in the casing；

   The switch enclosure and the water cooling box are arranged at the bottom of outer, the described battery bag lower box of the battery bag lower box； The high and low pressure connector being connected with the high and low pressure connecting line of the battery modules is provided with the battery bag lower box；It is described The first connector is provided with switch enclosure, first connector can be with the high and low pressure connector by way of patching Connection；The second connector being connected with outside line is also integrated with the switch enclosure；Inlet is provided with the water cooling box And liquid outlet, the flow channel entry point and runner exit set in the cooled plate passes through the battery bag lower box bottom, into institute Water cooling box is stated, and is connected respectively with the inlet and the liquid outlet；

   It is provided with least two module pressing plates on relative two end plates altogether between the battery modules；The module pressing plate bag Bottom plate and supporting plate are included, the supporting plate is arranged on the side of the bottom plate perpendicular to the bottom plate；

   The supporting plate of the two piece module pressing plates middle, adjacent positioned at the battery modules sets and is integrated, and adjacent Two pieces of module pressing plates the bottom plate at grade, formed monoblock type module pressing plate.
2. 2. lithium ion battery bag according to claim 1, it is characterised in that also including wire harness protection lower cover and wire harness protection Upper lid；The wire harness protection lower cover is set in the battery modules surrounding, is covered under the wire harness protection and is provided with low voltage wiring harness Cable tray and the hole for fixing low voltage wiring harness wiring, the low voltage wiring harness are drawn from the battery modules；The wire harness is protected Lid and the wire harness protection lower cover snapping, the low voltage wiring harness is enclosed in the wire harness protection lower cover in shield.
3. 3. lithium ion battery bag according to claim 1, it is characterised in that the both ends of the bottom plate of the module pressing plate Fixing hole is respectively arranged with, is pressed on the module pressing plate by the fixing hole at the bottom plate both ends using fixed component On corresponding two pieces of end plates.
4. 4. lithium ion battery bag according to claim 3, it is characterised in that be provided with circle on the monoblock type module pressing plate Column structure, covered with supporting in the battery bag；The cylindrical structure perpendicular to the bottom plate, be pressed in the supporting plate it On.
5. 5. lithium ion battery bag according to claim 4, it is characterised in that hole position is provided with the cylindrical structure, Be provided with through hole on lid in the battery bag, using stud by the through hole and the hole position, will in the battery bag lid with The cylindrical structure is fixed together.
6. 6. lithium ion battery bag according to claim 1, it is characterised in that the battery bag lower box and the battery bag Upper lid is provided with turnup structure.
7. 7. lithium ion battery bag according to claim 6, it is characterised in that the turnup structure of the battery bag lower box and Perforate is provided with the turnup structure covered in the battery bag, the flange using bolt and nut by the battery bag lower box The perforate on turnup structure covered in the perforate and the battery bag in structure, by the battery bag lower box and institute Lid in battery bag is stated to be fixed together.
8. 8. lithium ion battery bag according to claim 1, it is characterised in that the lithium ion battery bag includes at least two Block cooled plate, current divider is provided with the water cooling box, the coolant for being flowed into the inlet shunts.