CN219873708U - Battery pack with temperature control device - Google Patents

Abstract

The utility model provides a battery pack with a temperature control device, which solves the problem that the existing battery radiating structure is in a single processing mode and potential safety hazards still exist. The temperature control device comprises a heat treatment part and at least one heat transfer part; one part of the heat transfer part is arranged between adjacent batteries and used for exchanging heat with the battery shell of the single battery, and the other part extends to one side of the battery pack main body where the pole is arranged; the heat treatment part is positioned at one side of the battery pack main body provided with the battery pole, and exchanges heat with the heat transfer part and the battery pole. The temperature control device can exchange heat with the battery body through the heat transfer part and the heat treatment part, and can also exchange heat with the battery pole, so that the temperature of the whole battery is effectively controlled, and the performance problem and the safety problem caused by overhigh or overlow battery temperature are avoided.

Description

Battery pack with temperature control device

Technical Field

The utility model belongs to the field of batteries, and particularly relates to a battery pack with a temperature control device.

Background

The lithium battery is widely applied and can be applied to the fields of energy storage, power batteries and the like. With further development of lithium batteries, safety of lithium batteries is also receiving important attention. Because of the principle and structural characteristics of the lithium battery, larger heat can be generated in the charge and discharge process, the heat can be gradually increased, if the generated heat is not released in time, the heat can be accumulated in the battery, so that the temperature of the battery is uneven, the service life of the battery is shortened, the heat balance of the battery is destroyed in severe cases, a series of self-heating side reactions are caused, and the safety accident of the battery is further caused.

At present, the temperature of the battery is mainly controlled, and the problems are avoided as much as possible. For example, chinese patent CN103715473a discloses a power battery thermal management system, which mainly comprises a battery box, a heat pipe, a liquid flow plate, a liquid box, a semiconductor heating/cooling element, a liquid circulation pump, a battery control unit, a temperature sensor, a radiator and a fan, wherein the radiator and the fan are installed outside the battery box, and the rest are all positioned in the battery box and organically combined with the battery modules, the heat pipe is inserted between the battery modules, the heat pipe is tightly attached to the battery modules and the liquid flow plate positioned above the battery modules, the liquid flow plate is internally provided with a liquid circulation pipeline, the liquid circulation pump is connected with the liquid circulation pump, the liquid circulation pump is connected with the liquid box filled with circulating liquid, and the semiconductor heating/cooling element is contacted with the liquid box and attached to the radiator; the battery box is also internally provided with a temperature sensor connected with the battery control unit, and the battery control unit controls the liquid circulating pump, the semiconductor heating/refrigerating element and the fan to work.

The heat management system is mainly used for treating the heat of the battery body. However, the battery during charge and discharge, the post is the main part of the battery that generates heat, and may be the highest point of temperature during charge and discharge of the battery. The thermal management system disclosed above does not allow for timely and efficient processing of heat at the pole. At this time, chinese patent CN114597540a discloses a battery module and a vehicle, in which the battery module is provided with a heat dissipation assembly at a pole, the heat dissipation assembly exchanges heat with the pole, and directly cools or heats the pole of the battery, thereby improving the thermal management efficiency. In the battery module, the heat dissipation assembly processes the heat of the battery pole, and then the temperature of the battery is controlled.

According to the structure disclosed above, the existing heat management system and the heat dissipation assembly can process the heat of the battery body or the heat of the battery post, the single processing mode can not process the heat generated by the whole battery, the heat generated by the whole battery can not be effectively controlled, and certain safety problems still exist.

Disclosure of Invention

In order to solve the problem that the existing battery heat dissipation structure is in a single processing mode and potential safety hazards still exist, the utility model provides a battery pack with a temperature control device.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

the utility model provides a battery pack with a temperature control device, which comprises a battery pack main body and the temperature control device; the battery pack main body comprises a plurality of batteries which are sequentially arranged; the temperature control device comprises a heat treatment part and at least one heat transfer part; one part of the heat transfer part is arranged between adjacent batteries and used for exchanging heat with the battery shell of the single battery, and the other part extends to one side of the battery pack main body where the battery pole is arranged; the heat treatment part is positioned at one side of the battery pack main body provided with the battery pole, and exchanges heat with the heat transfer part and the battery pole. The temperature control device can exchange heat with the battery shell through the heat transfer part and the heat treatment part, and can also exchange heat with the battery pole, so that the temperature of the whole battery is effectively controlled, and the performance problem and the safety problem caused by overhigh or overlow battery temperature are avoided.

The battery pack main body comprises a plurality of batteries which are sequentially arranged, and has the characteristics of high space utilization rate, high integration level, high energy density and the like. The battery with high integration level can generate bulge deformation in the process of high-temperature storage or charge and discharge, the extrusion force generated by the bulge deformation easily causes battery leakage, and potential safety hazards can be brought. At this time, a corresponding pressure-bearing structure may be disposed between adjacent cells for suppressing deformation of the cell case due to expansion, and in the present utility model, since a heat transfer portion is disposed between adjacent cells, the above pressure-bearing effect may be achieved by the heat transfer portion or a mounting structure of the heat transfer portion, which may specifically include the following structural forms:

the first battery shell and the battery shell are provided with grooves on the side walls, two grooves of adjacent batteries form a mounting cavity, the heat transfer part is arranged in the mounting cavity, and the size of the heat transfer part is larger than that of the mounting cavity in the arrangement direction of the batteries, so that the heat transfer part can inhibit deformation of the battery shell caused by expansion;

the second battery shell is provided with an elongated member protruding out of the side wall of the shell, the elongated members of adjacent batteries form positioning and mounting grooves, and the heat transfer part is arranged in the positioning and mounting grooves; in the battery arrangement direction, the size of the heat transfer part is larger than that of the positioning mounting groove, so that the heat transfer part can inhibit deformation of the battery shell due to expansion;

the third battery shell is provided with an elongated member protruding out of the side wall of the shell, the elongated members of adjacent batteries are contacted to form a positioning mounting groove, and the heat transfer part is arranged in the positioning mounting groove; in the cell arrangement direction, the heat transfer part is smaller than the positioning mounting groove in size, at this time, deformation of two adjacent cell shells due to expansion can be restrained by the contacted slender members, and at this time, the heat transfer part is not directly contacted with the cell shells, but performs heat exchange in an air conduction mode.

Among the above three structures, the first structure and the second structure are preferably adopted, and the first structure and the second structure adopt a mode of clamping the heat transfer part, so that the heat transfer part is in close contact with the battery shell, and the heat exchange between the heat transfer part and the battery shell is facilitated.

The heat treatment part in the temperature control device can adopt various devices with heating and/or cooling functions. In view of the temperature control effect, a heat exchange device for transferring heat by liquid is preferably used. In the utility model, the heat exchange device is of a rectangular box structure, a liquid medium circulation channel is arranged in the rectangular box, and the width of the rectangular box is larger than the distance between the positive pole and the negative pole of the battery, so that the heat exchange device can directly transfer heat with the positive pole of the battery, and meanwhile, insulation treatment is realized between the rectangular box and the positive pole and the negative pole of each single battery.

Further, a plurality of baffles are arranged in the cavity of the heat exchange device, so that the liquid medium circulation channel of the heat exchange device is wavy, and the wavy cooling flow channel enables the liquid medium to flow to two sides of the cavity close to the pole to the greatest extent, and further performs better heat exchange with the battery pole.

In order to further increase the heat exchange efficiency of the heat treatment part and the heat transfer part, a bending section is arranged at the part of the heat transfer part extending to the battery pole, and heat transfer is carried out through the bending section and the heat treatment part, so that the heat exchange area of the heat transfer part and the heat treatment part is increased by the bending section.

In order to facilitate the formation of a modularized device between the battery pack main body and the temperature control device, the temperature control device and the battery pack main body can be assembled together for convenient subsequent installation, disassembly and transportation. In the present utility model, the heat transfer part, the heat treatment part, and the battery pack body are assembled as one body by the chucking assembly. The clamping assembly comprises a pressing plate and a backing plate; the backing plate is located the below of bending section, and sets up between the positive pole post and the negative pole post of battery, the clamp plate is located the top of heat treatment portion, clamp plate and battery casing direct fixed connection, perhaps the clamp plate passes through backing plate and battery casing fixed connection. Meanwhile, a positioning groove is formed in the end face, close to one side of the heat treatment portion, of the base plate, the bending section is embedded into the positioning groove, and the heat transfer portion is reliably positioned and mounted.

In most of the use environments of the battery, the frequency of the cooling treatment is larger than the frequency of the heating treatment, and the gravity heat pipe is preferably adopted in the heat transfer part in consideration of the heat transfer effect of heat transfer. The evaporating end of the gravity heat pipe is contacted with the battery shell to absorb heat, and the condensing end is in heat exchange with the heat treatment part. When the single battery is used, the battery pole is generally arranged at the top of the battery shell, so that the gravity heat pipe is used in the vertical direction, and the heat conduction effect of the gravity heat pipe can be optimized.

In order to ensure the safe and reliable use of the battery pack, an insulating layer or an insulating pad is further arranged on the contact surface of the heat treatment part, the heat transfer part and the battery pole.

Compared with the prior art, the technical scheme of the utility model has the following advantages:

the battery pack is provided with the temperature control device, the temperature control device can process the heat of the battery body and the heat of the battery post, the temperature control device timely processes the heat of the whole battery, the damage to the battery caused by the concentrated heat of the battery is avoided, and the battery pack has important significance for safe and stable operation of the battery.

The battery pack disclosed by the utility model realizes the treatment of heat at two positions of the battery shell and the battery pole through the same set of temperature control devices, and compared with a scheme adopting a plurality of sets of temperature control devices, the same set of temperature control devices is convenient to install, small in occupied space and capable of reducing the temperature control cost.

Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a battery pack with a temperature control device according to an embodiment of the present utility model;

FIG. 2 is an exploded view of a battery pack with a temperature control device according to an embodiment of the present utility model;

FIG. 3 is a cross-sectional view of a battery pack having a temperature control device in an embodiment of the present utility model;

FIG. 4 is a schematic view of a heat exchange device according to an embodiment of the present utility model;

FIG. 5 is a second schematic diagram of a battery pack with a temperature control device according to an embodiment of the present utility model;

fig. 6 is a second schematic explosion diagram of a battery pack with a temperature control device according to an embodiment of the present utility model.

Reference numerals: 1-battery, 2-heat treatment part, 3-heat transfer part, 4-heat exchange device, 5-clamp plate, 6-backing plate, 7-insulating pad, 11-battery case, 12-battery post, 13-slender component, 14-groove, 31-bending section, 41-baffle, 42-clamping groove, 61-positioning groove.

Detailed Description

The utility model will be described in detail below with reference to the drawings and the detailed description. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present utility model, and are not intended to limit the scope of the present utility model.

In the process of charging and discharging the battery, the temperature inside the battery is high, and the temperature at the electric connection part of the battery pole is also high. Based on the above, the utility model provides the battery pack with the temperature control device, which can treat the heat of the battery body and also treat the heat of the battery post, so that the temperatures of different positions of the whole battery are effectively controlled, and the safety of the battery is improved.

As shown in fig. 1 to 6, the temperature control device of the present utility model is mainly applied to a battery pack in which a plurality of batteries 1 are sequentially arranged in the thickness direction thereof to form a battery pack body. The temperature control device comprises a heat treatment part 2 and at least one heat transfer part 3; a part of the heat transfer portion 3 is provided between the adjacent cells 1 for heat exchange with the cell case of the unit cell, and the other part extends to the side of the battery pack body where the cell post 12 is provided. The heat treatment part 2 is located at one side of the battery pole 12, and exchanges heat with the heat transfer part 3 and also exchanges heat with the battery pole 12, thereby realizing control of temperatures of different areas of the whole battery.

When the battery is controlled in temperature, the heat transfer part 3 exchanges heat with the battery case 11, and the heat transfer part 3 transfers heat from a portion in contact with the battery case 11 to a portion in contact with the heat treatment part 2; subsequently, the heat treatment section 2 treats the transferred heat, and at the same time, the heat treatment section 2 directly exchanges heat with the battery post 12 to treat the heat generated from the battery post 12 so that the temperature of the entire battery 1 is within an optimal range. The heat treatment section 2 and the heat transfer section 3 above can be realized in various forms, and the structure and the preferred structure specifically adopted in the present embodiment are described below.

The heat treatment part 2 in the temperature control device of the present utility model may employ various devices having heating and/or cooling functions. For example, the heat treatment unit 2 may be a temperature control plate provided with a plurality of heat radiating fins, and the heat transferred by the heat transfer unit 3 may be dissipated through the heat radiating surfaces of the heat radiating fins, and a heating plate may be provided on the temperature control plate so as to have a heating function. For another example, the heat treatment unit 2 may employ a compression refrigerator or a TEC refrigerator, which exchanges heat with the heat transfer unit 3 and the battery post 12. For another example, the heat treatment unit 2 may employ a heat exchange device 4, and the heat exchange device 4 may employ a structure such as a liquid cooling tank or a liquid cooling pipe, and heat exchange may be achieved by circulation of a liquid medium. In the width direction of the battery 1, the heat treatment section 2 can cover at least a part of the battery post 12 so that heat exchange with the battery post 12 can be achieved, regardless of the configuration of the heat treatment section 2. In this embodiment, the heat treatment part 2 directly exchanges heat with the battery post 12 to form primary heat conduction, thereby improving heat exchange efficiency.

In the present embodiment, the heat treatment unit 2 preferably uses the heat exchange device 4 for transferring heat from the liquid in consideration of the temperature control effect. The heat exchange device 4 is of a rectangular box structure, and the width of the rectangular box is larger than the distance between the positive pole and the negative pole of the battery 1, so that the heat exchange device 4 can directly transfer heat with the battery pole 12. The inner space of the heat exchanger 4 is filled with a liquid medium which, when passing through the heat exchanger 4, interacts with the heat transfer part. The poles simultaneously realize heat exchange. The liquid medium may be water, ethylene glycol/water, propylene glycol/water, methanol/water, ethanol/water, calcium formate/water, or the like, having heat transfer capability. The heat exchange device 4 is provided with an inlet and an outlet for a liquid medium, and the liquid medium absorbs heat in the heat exchange device 4 and then processes the heat through an external circulation device and a cooling device. The above circulation device and cooling device may employ an existing conventional cooling circulation system, such as a circulation pump or a chiller, and will not be described in detail herein.

As shown in fig. 4, in this embodiment, a plurality of partition plates 41 may be further disposed in the cavity of the heat exchange device 4, and the plurality of partition plates 41 may control the flow direction of the liquid medium, so that the cooling flow passage of the heat exchange device 4 is a wavy flow passage, and the wavy cooling flow passage enables the liquid medium to fully flow into the cavity close to the two side poles, so that the liquid medium and the battery poles 12 perform sufficient heat exchange, and the heat exchange efficiency with the battery poles 12 is improved.

As shown in fig. 3, in the conventional battery pack, a plurality of batteries 1 are generally used in series or parallel, and the battery post 12 needs to be electrically connected to the post of the adjacent battery 1 and also needs to exchange heat with the heat treatment unit 2. At this time, the top surface of the battery post 12 may be designed in a stepped form, the low plane is a charge/discharge circuit connection plane, and is connected in series or in parallel with the conductive connection member, and the high plane is a heat conduction plane, and is in contact with the heat treatment portion 2 to realize heat exchange. In other connection modes, the top surfaces of the batteries 1 can be all heat conduction planes, and the poles of the adjacent batteries 1 can be electrically connected through the side surfaces of the poles.

In addition, as shown in fig. 2, if the heat treatment portion 2 is made of metal, an insulating layer or an insulating pad 7 is provided on the contact surface between the heat treatment portion 2 and the battery post 12, and the insulating layer may be specifically an insulating paint or an insulating paste coated on the surface of the heat treatment portion, in such a manner that the heat treatment portion 2 is in direct contact with the battery post 12 for heat exchange, in consideration of the insulation problem between the heat treatment portion and the battery post 12. However, since the insulating performance is ensured while considering the heat conduction effect, it is preferable to use an insulating pad having a heat conduction effect such as an insulating heat conduction silicon wafer having a small thickness.

In the temperature control device of the present utility model, the heat transfer part 3 is a member having heat transfer capability, absorbs heat generated from the body of the battery 1 when the battery 1 is charged or discharged, and transfers the heat to the heat treatment part 2, and the heat is treated by the heat treatment part 2, or the heat transfer part 3 absorbs heat of the heat treatment part 2, and then transfers the heat to the battery case 11. For example, a heat pipe, a heat-conducting aluminum plate, a heat-conducting copper plate, a water-cooling pipe, or the like can be specifically used. In order to improve the heat transfer performance, the heat transfer portion 3 is preferably formed in a sheet-like structure that is bonded to the side wall of the battery 1 case so as to have a large heat exchange area with the battery case 11.

If the heat transfer portion 3 is made of metal, possibly an electrical conductor, insulation is required between the battery case 11 and the heat transfer portion 3, or between the heat transfer portion 3 and the heat treatment portion 2, and insulation may be achieved by an insulating pad, an insulating film, an insulating paint, or an insulating adhesive, so that safe and reliable use of the battery pack is ensured.

In addition, the battery pack can generate bulge deformation in the process of high-temperature storage or charge and discharge, and the extrusion force generated by the bulge deformation easily causes leakage of the battery 1, so that potential safety hazards can be brought. At this time, a corresponding pressure-bearing structure may be provided between the adjacent cells 1 for suppressing deformation of the adjacent two cell cases 11 due to expansion, and in the present utility model, since the heat transfer portion 3 is provided between the adjacent cells 1, the above pressure-bearing effect may be achieved by the heat transfer portion 3 or the mounting structure of the heat transfer portion 3, and specifically may include the following structural forms:

first, as shown in fig. 5 and 6, grooves 14 are provided on the side walls of the battery cases 11, two grooves 14 of adjacent batteries 1 form a mounting cavity, a heat transfer portion 3 is provided in the mounting cavity, and in the battery arrangement direction, the size of the heat transfer portion 3 is larger than that of the mounting cavity, so that the heat transfer portion 3 can suppress deformation of the adjacent two battery cases 11 due to expansion;

second, as shown in fig. 1 to 3, the battery case 11 is provided with elongated members 13 protruding from the case side walls, the elongated members 13 of adjacent batteries 1 form positioning mounting grooves, and the number of the elongated members 13 constituting the positioning mounting grooves may be two or four; if the number of the elongated members 13 forming the positioning and mounting groove is two, one of the two adjacent shell side walls is respectively arranged, and the elongated members 13 on the two shell side walls are staggered; if the number of the elongated members 13 forming the positioning and mounting groove is four, two adjacent shell side walls are respectively provided with two elongated members 13, and the positions of the elongated members 13 on the two shell side walls are in one-to-one correspondence; the heat transfer part 3 is arranged in the positioning and mounting groove; in the cell arrangement direction, the heat transfer portion 3 has a size larger than that of the positioning mounting groove, so that the heat transfer portion 3 can suppress deformation of the adjacent two cell cases 11 due to expansion;

thirdly, the battery shell is provided with an elongated member 13 protruding out of the side wall of the shell, the elongated members 13 of adjacent batteries are contacted to form a positioning mounting groove, and the heat transfer part is arranged in the positioning mounting groove; in this configuration, a different number of elongate members 13 are formed with locating mounting slots in a similar manner to the second configuration. In the cell arrangement direction, the heat transfer portion has a smaller size than the positioning mounting groove, and at this time, deformation of the adjacent two cell cases 11 due to expansion can be suppressed by the elongated members 13 that are in contact;

among the above three structures, the heat transfer part 3 of the third structure is not in direct contact with the battery case, a certain gap is formed between the heat transfer part 3 and the side wall of the battery case, and heat during heat exchange is transferred through air, so that the heat transfer effect is poor. Therefore, the first structure and the second structure are preferably adopted, and the first structure and the second structure adopt a mode of clamping the heat transfer part 3, so that the heat transfer part 3 is tightly contacted with the battery shell 11, and the heat exchange between the heat transfer part 3 and the battery shell is facilitated.

The structural mode of taking the heat transfer part 3 as the pressure bearing structure can buffer and reduce the expansion pressure of adjacent batteries, avoids potential safety hazards such as leakage, internal short circuit, thermal runaway and the like caused by bulge deformation, and improves the safety and reliability of the whole battery pack. In addition, set up heat transfer portion 3 between two adjacent batteries 1, can also provide the heat dissipation passageway for two adjacent batteries 1, the heat that battery 1 produced can go on in time effectual output through this heat dissipation passageway, further promotes the radiating effect of group battery.

The heat transfer unit 3 of the present utility model has the above pressure-bearing performance, and mainly realizes heat exchange between the battery case 11 and the heat treatment unit 2. In order to increase the heat exchange efficiency as much as possible when the heat transfer portion 3 and the heat treatment portion 2 transfer heat, a bending section 31 may be provided on the top of the heat transfer portion 3, and the bending section 31 is preferably a heat transfer plane, and the surface opposite to the heat treatment portion 2 is closely attached to the heat transfer section, so that the heat transfer portion 3 transfers heat to the heat treatment portion 2 through the bending section 31, and the heat transfer area between the heat transfer portion 3 and the heat treatment portion 2 is increased by the bending section 31, thereby increasing the heat transfer efficiency.

As shown in fig. 5 and 6, in other embodiments, the heat transfer portion 3 may be heat-exchanged with the heat treatment portion 2 without providing the bending section 31, and in this case, in order to increase the contact area between the heat transfer portion 3 and the heat treatment portion 2, a plurality of grooves 42 recessed into the inner cavity of the heat treatment portion 2 may be provided at the bottom of the heat treatment portion 2, and the top of the heat transfer portion 3 may be fitted into the grooves 42 of the heat exchange device 4 to exchange heat with the heat exchange device 4. Meanwhile, in the heat exchange device 4 provided with the partition plate 41, the card slot 42 may be provided directly in the partition plate 41. Such a structure requires a higher structural form of the heat treatment section 2 than a structure provided with the bending section 31.

The battery 1 is much more likely to be cooled than heated, and the heat transfer unit 3 preferably uses a gravity heat pipe with its evaporation end in contact with the battery 1 case for heat exchange and its condensation end in heat exchange with the heat treatment unit 2, considering the heat transfer effect. Meanwhile, when the single battery is used, the battery pole is generally arranged upwards, and at the moment, the gravity heat pipe is used in the vertical direction, so that the heat conduction effect is optimal.

When the temperature control device is used, the temperature control device needs to be fixed, for example, the heat treatment part 2 can be connected with a supporting structure outside the battery pack, so that the heat treatment part is supported, an installation boss is arranged on the side wall of the battery shell, and the installation boss supports the heat transfer part 3.

However, to facilitate subsequent assembly, disassembly, and transportation of the battery pack, the temperature control device and the battery pack body may be assembled together to form a modular device. After the temperature control device and the battery pack form a modularized device, the structure of the battery pack is more compact, the occupied space is smaller, the assembly is convenient, the carrying is portable, and in the embodiment, the integrated connection is realized through the following clamping assemblies.

As shown in fig. 1 to 3, in the present embodiment, the chucking assembly includes a pressing plate 5 and a backing plate 6; backing plate 6 is located the below of bending section 31, and sets up between the positive pole post and the negative pole post of battery 1, and clamp plate 5 is located the top of heat treatment portion 2, and clamp plate 5 adopts U template structure, and heat treatment portion 2 embedding U template is in, and clamp plate 5 and backing plate 6 will transfer heat portion 3, heat treatment portion 2 and connect, then, with the bottom and the battery case 11 fixed connection of U template, perhaps, with the bottom and backing plate 6 fixed connection of U template, then with backing plate 6 and battery case 11 fixed connection, and then with temperature control device and group battery main part connection as an organic whole. In addition, a positioning groove 61 is formed on one end surface of the pad 6, which is close to the pair of heat treatment parts 2, and the bending section 31 is embedded in the positioning groove 61 to reliably position and mount the heat transfer part 3. The upper pressing plate 5 and the backing plate 6 are preferably made of insulating materials while stable installation is realized, so that the safety of the whole battery pack is good. In the specific manufacturing process, the pressing plate 5 and the backing plate 6 can be specifically plastic plates, pp plates, pe plates, nylon plates, PC plates, ceramic plates, resin plates and the like.

As shown in fig. 5 and 6, if the heat transfer portion 3 is not provided with the bending section 31, an embedded structure is adopted with the heat treatment portion 2, insulating paint or insulating glue is coated on the bottom of the heat treatment portion 2 and in the clamping groove to realize insulating treatment, at this time, a cushion plate can not be arranged, the pressing plate 5 adopts a U-shaped plate structure, the liquid cooling plate is embedded in the U-shaped plate, and the bottom of the U-shaped plate is directly connected with a fixing column on the battery shell 11 through bolts, so that the temperature control device and the battery pack main body are connected into a whole, and modularization of the whole battery pack is realized.

Claims (10)

1. The battery pack with the temperature control device is characterized by comprising a battery pack main body and the temperature control device;

the battery pack main body comprises a plurality of batteries which are sequentially arranged;

the temperature control device comprises a heat treatment part and at least one heat transfer part;

one part of the heat transfer part is arranged between adjacent batteries and used for exchanging heat with the battery shell of the single battery, and the other part extends to one side of the battery pack main body where the battery pole is arranged;

the heat treatment part is positioned at one side of the battery pack main body provided with the battery pole, and exchanges heat with the heat transfer part and the battery pole.

2. The battery pack with the temperature control device according to claim 1, wherein the battery case is provided with an elongated member protruding from a side wall of the case, the elongated members of adjacent batteries form a positioning mounting groove, and the heat transfer portion is provided in the positioning mounting groove; in the battery arrangement direction, the size of the heat transfer part is larger than that of the positioning mounting groove, so that the heat transfer part can restrain deformation of the battery shell due to expansion.

3. The battery pack with the temperature control device according to claim 1, wherein grooves are formed in the side wall of the battery case, two grooves of adjacent batteries form a mounting cavity, the heat transfer portion is disposed in the mounting cavity, and in the battery arrangement direction, the heat transfer portion is larger than the mounting cavity in size, so that the heat transfer portion can suppress deformation of the battery case due to expansion.

4. A battery pack with a temperature control device according to any one of claims 1 to 3, wherein the heat treatment part is a heat exchange device, the heat exchange device is a rectangular box structure, a liquid medium circulation channel is arranged in the rectangular box, the width of the rectangular box is larger than the distance between the positive pole and the negative pole of the battery, and the rectangular box is insulated from the positive pole and the negative pole of each single battery.

5. The battery pack with temperature control device according to claim 4, wherein a plurality of separators are provided in the cavity of the heat exchange device such that the liquid medium circulation passage of the heat exchange device is wave-shaped.

6. The battery pack with a temperature control device according to claim 4, wherein a portion of the heat transfer portion extending to the battery post is provided with a folded section that exchanges heat with the heat treatment portion.

7. The battery pack with a temperature control device according to claim 6, wherein the heat transfer part is connected with the heat treatment part through a clamping assembly, the clamping assembly including a pressing plate and a backing plate; the backing plate is located the below of bending section, and sets up between the positive pole post and the negative pole post of battery, the clamp plate is located the top of heat treatment portion, clamp plate and battery casing direct fixed connection, perhaps the clamp plate passes through backing plate and battery casing fixed connection.

8. The battery pack with the temperature control device according to claim 7, wherein a positioning groove is provided on an end face of the mat plate on a side close to the heat treatment portion, and the bent section is embedded in the positioning groove.

9. The battery pack with a temperature control device according to claim 8, wherein the heat transfer portion is a gravity heat pipe, an evaporation end of the gravity heat pipe is in contact with the battery case, and a condensation end is in heat exchange with the heat treatment portion.

10. The battery pack with the temperature control device according to claim 9, wherein an insulating layer or an insulating pad is provided on a contact surface of the heat treatment portion with the heat transfer portion and the battery post.