CN216980682U - Battery pack shell, battery pack and vehicle - Google Patents

Abstract

The present disclosure relates to a battery pack case, a battery pack and a vehicle, wherein the battery pack case comprises a first case (1) and a second case (2), a containing cavity (13) for containing a battery is formed inside the first case (1), the first case (1) is provided with a battery heat management part (11), a flow channel (111) is formed in the battery heat management part (11), a heat exchange medium is suitable for flowing through the flow channel (111), and the heat exchange medium is suitable for performing heat exchange with the battery; the second shell (2) is located on the outer side of the battery heat management part (11) and connected with the battery heat management part (11), and a first vacuum cavity (21) is formed between the second shell (2) and the battery heat management part (11). The battery can body can adjust the temperature of the battery so that the battery is in a proper temperature range.

Description

Battery pack shell, battery pack and vehicle

Technical Field

The disclosure relates to the technical field of battery pack shells, in particular to a battery pack shell, a battery pack and a vehicle.

Background

The temperature of the battery has great influence on the safety, service life, function, performance and the like of the battery, and the use of the battery is influenced when the temperature is too high or too low. The general battery has a proper working temperature range, the capacitance of the battery is reduced, the internal resistance of the battery is increased, the cruising ability of the battery is reduced and the like due to the low temperature of the battery, the charging and discharging current is limited or thermal runaway is generated due to the high temperature of the battery, and the explosion of the battery can be caused in serious cases. Therefore, it is important to maintain the battery in a suitable operating temperature range.

SUMMERY OF THE UTILITY MODEL

An object of the present disclosure is to provide a battery pack case, a battery pack, and a vehicle to solve the problems in the related art.

In order to achieve the above object, according to a first aspect of the present disclosure, the present disclosure provides a battery pack case, including a first case and a second case, where the first case forms a receiving cavity for receiving a battery therein, the first case has a battery thermal management portion, a flow channel is formed in the battery thermal management portion, the flow channel is adapted to allow a heat exchange medium to flow therethrough, and the heat exchange medium is adapted to exchange heat with the battery; the second shell is located on the outer side of the battery heat management part and connected with the battery heat management part, and a first vacuum cavity is formed between the second shell and the battery heat management part.

Optionally, the first housing further has a connection portion, the battery thermal management portion and the connection portion together enclose the accommodation cavity, the battery pack housing further includes a third housing, the third housing is located on the inner side of the connection portion or the outer side of the connection portion and is connected to the connection portion, and a second vacuum cavity is formed between the third housing and the connection portion.

Optionally, the first housing includes a battery tray and a cover plate covering the battery tray, the cover plate is the battery thermal management portion, and the battery tray is the connecting portion.

Optionally, the second housing is used for being connected with or integrally formed with a body of a vehicle;

or the third shell is positioned at the outer side of the battery tray, and at least part of the third shell is used for being connected with the body of a vehicle or integrally formed with the body of the vehicle;

or the third shell is positioned on the outer side of the battery tray, and the second shell and at least part of the third shell are used for being connected with or integrally formed with the body of a vehicle.

Optionally, a first air hole is formed in the second casing, the first air hole is communicated with the first vacuum cavity, the first air hole is used for being connected with a vacuum pumping device, the battery pack casing further includes a first blocking structure, and the first blocking structure is used for blocking the first air hole;

the battery pack shell further comprises a second plugging structure, and the second plugging structure is used for plugging the second air hole.

Optionally, a first support structure is arranged in the first vacuum cavity, and the first support structure is connected between the second shell and the battery thermal management part;

and a second supporting structure is arranged in the second vacuum cavity and connected between the third shell and the connecting part.

Optionally, the first support structure and the second support structure are both made of a rubber material.

Optionally, the edge of second casing is formed with first installation department, the edge of battery thermal management portion is formed with the second installation department, the edge of third casing is formed with the third installation department, the edge of connecting portion is formed with the fourth installation department, first installation department the second installation department the third installation department and the fourth installation department range upon range of setting and interconnect.

Optionally, a first sealing layer is arranged between the first installation part and the second installation part, a second sealing layer is arranged between the third installation part and the fourth installation part, and a third sealing layer is arranged between the second installation part and the third installation part.

Optionally, a heat reflecting layer is disposed on at least one of an inner surface of the second case, an inner surface of the third case, an inner surface of the battery thermal management portion, and an inner surface of the connection portion.

Optionally, the second housing may be detachably connected to the battery thermal management part, and/or the third housing may be detachably connected to the connection part.

Optionally, the battery pack case further comprises a reinforcing beam disposed within the receiving cavity.

According to a second aspect of the present disclosure, there is provided a battery pack including a battery and the battery pack case described above.

According to a third aspect of the present disclosure, there is provided a vehicle including the battery pack described above.

Through above-mentioned technical scheme, in the battery package casing that this disclosure provided, the battery is placed in the intracavity that holds that first casing inside formed, because be formed with in the battery thermal management portion of first casing and be used for supplying the runner that heat transfer medium flowed through, back in heat transfer medium inflow runner, heat exchange medium can take place the heat exchange with the battery in the first casing, heats or cools off the battery, makes the battery can be in suitable operating temperature within range. And because the first vacuum cavity is formed between the second shell and the battery heat management part, the first vacuum cavity can isolate heat conduction, thereby reducing the temperature influence of the external environment temperature on the battery in the first shell and playing a certain role in heat preservation of the battery in the first shell. In addition, because the second casing is located the outside of battery heat management portion, can not influence on the heat transfer medium in the battery heat management portion and carry out heat exchange with the battery on the one hand, on the other hand also can play the heat preservation effect to the heat transfer medium in the battery heat management portion, avoids heat loss because of taking place heat exchange with the external environment for the heat transfer medium.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

fig. 1 is a schematic perspective view of a battery pack case according to an exemplary embodiment of the present disclosure;

FIG. 2 is an enlarged view of portion A of FIG. 1;

fig. 3 is a cross-sectional view of a battery pack case in a width direction thereof according to an exemplary embodiment of the present disclosure;

FIG. 4 is an enlarged view of portion B of FIG. 3;

FIG. 5 is an enlarged view of portion C of FIG. 3;

fig. 6 is a schematic view of a second case of a battery pack case integrally formed with a vehicle body according to an exemplary embodiment of the present disclosure.

Description of the reference numerals

100-a battery pack housing; 1-a first housing; 11-a battery thermal management; 111-flow channel; 112 heat exchange medium inlet; 113-heat exchange medium outlet; 114-a second mounting portion; 12-a connecting part; 121-a fourth mounting portion; 13-a containment chamber; 14-a battery tray; 141-a bottom plate; 142-a side plate; 15-cover plate; 2-a second housing; 21-a first vacuum chamber; 24-a first mounting portion; 3-a third shell; 31-a second vacuum container; 32-a second air hole; 33-a third mounting portion; 4-a vehicle body; 6-a second occluding structure; 61-a second rubber plug; 62-a second metal plug; 7-a first support structure; 8-a second support structure; 9-a heat reflecting layer; 10-a first sealing layer; 16-a stiffening beam; 17-a second sealing layer; 18-a third sealing layer; 19-mounting a lifting lug; 20-a low voltage interface; 22-high voltage interface; 23-heating the film.

Detailed Description

The following detailed description of the embodiments of the disclosure refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, unless otherwise specified, the use of directional terms such as "lengthwise" and "widthwise" with particular reference to fig. 1, the terms "inside and outside" refer to the inside and outside of the corresponding structural outline.

As shown in fig. 1 to 6, according to a first aspect of the present disclosure, the present disclosure provides a battery pack case 100, including a first case 1 and a second case 2, a receiving cavity 13 for receiving a battery is formed inside the first case 1, the first case 1 has a battery thermal management part 11, a flow channel 111 is formed inside the battery thermal management part 11, a heat exchange medium is adapted to flow through the flow channel 111, and the heat exchange medium is adapted to exchange heat with the battery; the second case 2 is located outside the battery thermal management unit 11 and connected to the battery thermal management unit 11, and a first vacuum chamber 21 is formed between the second case 2 and the battery thermal management unit 11.

Through the technical scheme, in the battery pack casing 100 provided by the disclosure, the battery is placed in the accommodating cavity 13 formed inside the first casing 1, and since the flow channel 111 for the heat exchange medium to flow through is formed in the battery heat management part 11 of the first casing 1, after the heat exchange medium flows into the flow channel 111, the heat exchange medium can exchange heat with the battery in the first casing 1, so as to heat or cool the battery, and the battery can be in a proper working temperature range. In addition, the first vacuum cavity 21 is formed between the second shell 2 and the battery thermal management part 11, and the first vacuum cavity 21 can isolate heat conduction, so that the influence of the external environment temperature on the temperature of the battery in the first shell 1 is reduced, and the effect of keeping the temperature of the battery in the first shell 1 is achieved to a certain extent. In addition, because the second shell 2 is located outside the battery heat management part 11, on one hand, heat exchange between the heat exchange medium in the battery heat management part 11 and the battery is not affected, on the other hand, the heat exchange medium in the battery heat management part 11 can be kept warm, and heat loss caused by heat exchange between the heat exchange medium and the external environment is avoided.

Here, the battery accommodated in the accommodating chamber 13 may be a plurality of unit batteries directly put into the accommodating chamber 13, or may be a battery module including a plurality of unit batteries, which is not limited in the present disclosure.

In order to improve the structural strength of the first housing 1 and to facilitate the assembly of the battery in the receiving cavity 13, as an embodiment, as shown in fig. 3, the battery pack housing further includes a reinforcing beam 16, and the reinforcing beam 16 is disposed in the receiving cavity 13. A reinforcing beam 16 may be provided in the receiving cavity 13, the battery may be mounted on the reinforcing beam 16 by bolts, and the reinforcing beam 16 may also serve to support the first case 1, thereby improving the strength of the first case 1. In other embodiments, the battery may be directly bonded in the receiving cavity 13.

In addition, the above-mentioned heat exchange medium refers to a medium capable of exchanging heat with the battery, and the heat exchange medium may be a cooling liquid (for example, water) or a cooling medium, which is not limited in the present disclosure. The number of the flow paths 111 in the battery thermal management unit 11 may be one, or may be plural, and the plurality of flow paths 111 may communicate with each other.

Alternatively, in order to facilitate the heat exchange medium to flow into the flow channel 111, as shown in fig. 1 and 2, a heat exchange medium inlet 112 and a heat exchange medium outlet 113 may be formed on the battery thermal management part 11, and both the heat exchange medium inlet 112 and the heat exchange medium outlet 113 are communicated with the flow channel 111.

Alternatively, as shown in fig. 2 and 3, a first sealing layer 10 may be provided between the second case 2 and the battery thermal management part 11, the first sealing layer 10 serving to seal the first vacuum chamber 21, thereby securing the vacuum effect of the first vacuum chamber 21.

The first housing 1 may be provided with all of the battery thermal management units 11, or may be provided with some of the battery thermal management units 11, which is not limited in the present disclosure. In the case that the first housing 1 is partially the battery thermal management part 11, as an embodiment, as shown in fig. 3, the first housing 1 may further have a connection part 12, the battery thermal management part 11 and the connection part 12 together enclose a receiving cavity 13, the battery pack housing 100 may further include a third housing 3, the third housing 3 is located inside the connection part 12 or outside the connection part 12 and is connected to the connection part 12, and a second vacuum cavity 31 is formed between the third housing 3 and the connection part 12. The battery is placed in the accommodating cavity 13 which is defined by the battery thermal management part 11 and the connecting part 12 together, and the second vacuum cavity 31 is formed between the third shell 3 and the connecting part 12, so that the second vacuum cavity 31 can also keep the temperature of the battery placed in the accommodating cavity 13, and the battery is ensured to be in a proper working temperature range.

Alternatively, as shown in fig. 3, a second sealing layer 17 may be provided between the third casing 3 and the connecting portion 12, the second sealing layer 17 being used to seal the second vacuum chamber 31, thereby securing the vacuum effect of the second vacuum chamber 31.

Alternatively, as shown in fig. 3, a third sealing layer 18 may be provided between the battery thermal management section 11 and the third case 3, the third sealing layer 18 being for sealing the accommodation chamber 13 so as to prevent water or dust from entering the accommodation chamber 13 to affect the use of the battery.

The first housing 1 may have any suitable structure and shape, for example, as shown in fig. 3, the first housing 1 may include a battery tray 14 and a cover plate 15 covering the battery tray 14, and the battery tray 14 includes a bottom plate 141 and side plates 142 formed around the bottom plate 141. As an embodiment, the cover 15 may be the above-mentioned battery thermal management part 11, and the battery tray 14 may be the above-mentioned connection part 12.

As another embodiment, the bottom plate 141 is the battery thermal management part 11, and both the side plate 142 and the cover plate 15 are the connecting part 12.

In still another embodiment, the bottom plate 141 and the cover plate 15 are both the battery thermal management unit 11, and the side plate 142 is the connection unit 12.

In order to facilitate the mounting between the second case 2, the battery thermal management section 11, the third case 3, and the connection section 12, optionally, as shown in fig. 5, a first mounting portion 24 may be formed at an edge of the second case 2, a second mounting portion 114 may be formed at an edge of the battery thermal management section 11, a third mounting portion 33 may be formed at an edge of the third case 3, a fourth mounting portion 121 may be formed at an edge of the connection section 12, and the first mounting portion 24, the second mounting portion 114, the third mounting portion 33, and the fourth mounting portion 121 are stacked and connected to each other. The second case 2, the battery thermal management section 11, the third case 3, and the connection section 12 can be connected to assemble a battery pack case by the first, second, third, and fourth mounting sections 24, 114, 33, and 121 formed at the edges of the second case 2, the battery thermal management section 11, the third case 3, and the connection section 12.

Alternatively, as shown in fig. 5, the first mounting portion 24 may be a burring structure formed at the edge of the second case 2, the second mounting portion 114 may be a burring structure formed at the edge of the battery thermal management portion 11, the third mounting portion 33 may be a burring structure formed at the edge of the third case 3, and the fourth mounting portion 121 may be a burring structure formed at the edge of the connecting portion 12. Since the first mounting portion 24, the second mounting portion 114, the third mounting portion 33, and the fourth mounting portion 121 may be all of a burring structure, it is possible to facilitate the connection between the second case 2, the battery thermal management portion 11, the third case 3, and the connecting portion 12.

Alternatively, as shown in fig. 5, the first sealant 10 may be disposed between the first and second mounting parts 24 and 114, the second sealant 17 may be disposed between the third and fourth mounting parts 33 and 121, and the third sealant 18 may be disposed between the second and third mounting parts 114 and 33.

Further, the battery pack case 100 provided by the present disclosure may be attached to the body 4 of the vehicle in various ways. For example, as an embodiment, as shown in fig. 1, in the case where the third housing 3 is located inside the battery tray 14, the battery tray 14 may be formed with an attachment lug 19, and the attachment lug 19 is used to attach the battery pack housing 100 to the vehicle body 4 of the vehicle. For the case where the third housing 3 is located outside the battery tray 14, the mounting lugs 19 may be provided on the third housing 3.

As another embodiment, the second case 2 located outside the cover 15 is used to be connected to the vehicle body 4 of the vehicle or integrally formed with the vehicle body 4 of the vehicle, thereby realizing integration of the battery pack case 100 to the vehicle body 4. As shown in fig. 6, in the embodiment in which the second case 2 is integrally formed with the vehicle body 4, the third case 3 may be disposed outside the battery tray 14 and connected to the vehicle body 4, and during assembly, the cover plate 15 may be first connected to the second case 2, the battery tray 14 may be connected to the cover plate 15, and finally the third case 3 may be covered outside the battery tray 14 and connected to the vehicle body 4, and after evacuation, the first vacuum chamber 21 and the second vacuum chamber 31 may be formed outside the cover plate 15 and the battery tray 14.

In yet another embodiment, the third housing 3 may be located outside the battery tray 14, and at least a portion of the third housing 3 is used for connecting with the body 4 of the vehicle or integrally formed with the body 4 of the vehicle. For the embodiment in which at least part of the third housing 3 is integrally formed with the body 4 of the vehicle, a recessed cavity may be formed in the body 4, the side wall of the cavity being at least part of the third housing 3. In yet another embodiment, the third housing 3 may be located outside the battery tray 14, and the second housing 2 and at least a portion of the third housing 3 are used for connecting with the vehicle body 4 or integrally forming with the vehicle body 4, so as to integrate the battery pack housing 100 on the vehicle body 4. For the embodiment in which the second housing 2 and at least a portion of the third housing 3 are integrally formed with the vehicle body 4, a recessed cavity may be formed in the vehicle body 4, into which the cover 15 and the battery tray 14 are fitted, the top wall of the cavity being the second housing 3, and the side wall of the cavity being at least a portion of the third housing 3.

Alternatively, as shown in fig. 3, a heating film 23 may be provided in the second vacuum container 31, the heating film 23 being used to heat the battery. The heating film 23 disposed in the second vacuum container 31 can further raise the temperature of the battery at a place where the temperature is low, thereby ensuring the performance of the battery.

In order to enable the first vacuum chamber 21 and the second vacuum chamber 31 to be evacuated, optionally, a first air hole may be formed on the second casing 2, the first air hole is communicated with the first vacuum chamber 21, the first air hole is used for connecting with an evacuation device, and the battery pack casing 100 may further include a first blocking structure, and the first blocking structure is used for blocking the first air hole. The first air hole in the second shell 2 is connected with a vacuumizing device, so that the first vacuum cavity 21 can be vacuumized, the first air hole is blocked by the first blocking structure, air can be prevented from entering the vacuum cavity from the first air hole, and the vacuum environment in the first vacuum cavity 21 is guaranteed.

As shown in fig. 3 and 4, the connection portion 12 located outside the third casing 3 or the third casing 3 located outside the connection portion 12 may be formed with a second air hole 32 (i.e., the second air hole 32 is located on the third casing 3 in the case where the third casing 3 is located outside the connection portion 12, and the second air hole 32 is located on the connection portion 12 in the case where the third casing 3 is located inside the connection portion 12), the second air hole 32 being in communication with the second vacuum chamber 31, the second air hole 32 being used for connection with a vacuum-pumping device, and the battery pack casing 100 may further include a second blocking structure 6, the second blocking structure 6 being used for blocking the second air hole 32. The second air hole 32 is connected with a vacuumizing device, so that the inside of the second vacuum cavity 31 can be vacuumized, the second air hole 32 is blocked by the second blocking structure 6, air can be prevented from entering the vacuum cavity from the second air hole 32, and the vacuum environment in the second vacuum cavity 31 is guaranteed.

In order to ensure the blocking effect of the first blocking structure and the second blocking structure 6, optionally, the first blocking structure may include a first rubber plug and a first metal plug, the first rubber plug is configured to be inserted into the first air hole, and the first metal plug is configured to cover the outer side of the first rubber plug and be connected to the second housing 2. The first rubber plug is inserted into the first air hole to block the first air hole, so that air is prevented from entering the first vacuum cavity 21 from the first air hole, the first metal plug arranged outside the first rubber plug is connected with the second shell 2, the first air hole and partial area around the first air hole are sealed in the area covered by the first metal plug, the blocking effect on the first air hole is further enhanced, and the vacuum environment in the first vacuum cavity 21 is further ensured.

As shown in fig. 4, the second blocking structure 6 may include a second rubber plug 61 for being inserted into the second air hole 32, and a second metal plug 62 for covering an outer side of the first rubber plug and being connected to the connecting portion 12 located at an outer side of the third casing 3 or the third casing 3 located at an outer side of the connecting portion 12. The second rubber plug 61 is inserted into the second air hole 32 to block the second air hole 32, so as to prevent air from entering the second vacuum chamber 31 from the second air hole 32, the first metal plug covering the second rubber plug 61 is connected with the connecting portion 12 located outside the third casing 3 or the third casing 3 located outside the connecting portion 12, so that the second air hole 32 and a part of the area around the second air hole 32 are sealed in the area covered by the second metal plug 62, thereby further enhancing the blocking effect on the second air hole 32, and further ensuring that the inside of the second vacuum chamber 31 is in a vacuum environment.

In order to avoid deformation of the first vacuum container 21 and the second vacuum container 31, optionally, as shown in fig. 3, a first support structure 7 may be provided in the first vacuum container 21, the first support structure 7 being connected between the second case 2 and the battery thermal management part 11; a second support structure 8 may be provided within the second vacuum chamber 31, the second support structure 8 being connected between the third casing 3 and the connecting portion 12. When the first vacuum container 21 and the second vacuum container 31 are evacuated, the second case 2 and the battery thermal management part 11 and the third case 3 and the connecting part 12 are easily deformed due to the change of air pressure, and the first support structure 7 connected between the second case 2 and the battery thermal management part 11 can provide support for the second case 2 and the battery thermal management part 11, so that the second case 2 and the battery thermal management part 11 are prevented from being deformed; the second support structure 8 connected between the third housing 3 and the connection portion 12 may provide support for the third housing 3 and the connection portion 12, thereby avoiding deformation of the third housing 3 and the connection portion 12.

Alternatively, the first and second support structures 7 and 8 may be provided in plurality, and the first support structures 7 may be provided at intervals in the longitudinal direction or the width direction of the battery pack case 100 in the first vacuum chamber 21 and the second support structures 8 may be provided at intervals in the longitudinal direction or the width direction of the battery pack case 100 in the second vacuum chamber 31. The plurality of first support structures 7 and the plurality of second support structures 8 can ensure the support effect for the first vacuum container 21 and the second vacuum container 31, and the first support structures 7 are arranged at intervals and the second support structures 8 are arranged at intervals, so that the vacuum can be dispersed in the first vacuum container 21 and the second vacuum container 31.

Alternatively, both the first support structure 7 and the second support structure 8 may be made of a rubber material. The rubber has a low thermal conductivity and is capable of blocking the temperature transfer, thereby facilitating the temperature maintenance, and the rubber has a good elasticity and is advantageous for supporting the first vacuum chamber 21 and the second vacuum chamber 31.

In order to further ensure the heat preservation effect, optionally, as shown in fig. 3, a heat reflection layer 9 may be provided on at least one of the inner surface of the second case 2, the inner surface of the third case 3, the inner surface of the battery thermal management portion 11, and the inner surface of the connection portion 12. The inner surface of the second case 2 is provided with the heat reflection layer 9, which can reflect heat of the battery thermal management part 11, thereby contributing to further improving the heat preservation effect of the battery thermal management part 11. The inner surface of the third housing 3 and/or the inner surface of the battery thermal management part 11 and/or the inner surface of the connection part 12 are provided with the heat reflection layer 9 for reflecting the heat of the battery, thereby contributing to further improving the heat preservation effect of the battery.

Here, the inner surface of the second case 2 refers to a surface of the second case 2 close to the battery, that is, a surface close to the battery thermal management portion 11. The inner surface of the battery thermal management part 11 refers to a surface of the battery thermal management part 11 near the battery. The inner surface of the third casing 3 refers to the surface of the third casing 3 close to the battery, and for the case where the third casing 3 is located inside the connecting portion 12, the inner surface of the third casing 3 refers to the surface of the third casing 3 close to the battery; in the case where the third housing 3 is located outside the connection portion 12, the inner surface of the third housing 3 refers to a surface of the third housing 3 close to the connection portion 12. The inner surface of the connecting portion 12 refers to the surface of the connecting portion 12 close to the battery, and for the case where the third case 3 is located inside the connecting portion 12, the inner surface of the connecting portion 12 refers to the surface of the connecting portion 12 close to the third case 3; in the case where the third case 3 is located outside the connection portion 12, the inner surface of the connection portion 12 refers to the surface of the connection portion 12 close to the battery. Optionally, the heat reflection layer 9 may be an aluminum plating layer, and the heat may be reflected on the aluminum plating layer to reflect the heat back, so as to prevent the heat from radiating outwards, thereby achieving the purpose of heat preservation and heat insulation.

Alternatively, the second housing 2 may be detachably attached to the battery thermal management section 11, and/or the third housing 3 may be detachably attached to the attachment section 12. Due to the detachable connection between the second housing 2 and the battery thermal management section 11, the third housing 3 and the connecting section 12 are detachably connected. In places with higher ambient temperature, if the requirement for battery heat preservation is lower, the second shell 2 and/or the third shell 3 can be removed; in a place with lower ambient temperature, if the requirement for heat preservation of the battery is higher, the second shell 2 and/or the third shell 3 can be installed to preserve the heat of the battery.

In addition, the second housing 2 is detachably connected to the battery thermal management unit 11, so that the second housing 2 can be conveniently detached from the battery thermal management unit 11, the battery thermal management unit 11 can be maintained, and the second housing 2 can be conveniently replaced; the third housing 3 is detachably connected to the connecting portion 12, so that the third housing 3 can be easily replaced.

Here, it should be noted that the detachable connection may be a bolt threaded connection, a rivet connection, or a clamping block and a clamping groove, and the disclosure does not limit this.

Optionally, as shown in fig. 1, a low-voltage interface 20 and a high-voltage interface 22 may be disposed on the first housing 1, where the low-voltage interface 20 is used to transmit the acquired signal to the vehicle controller, and the high-voltage interface 22 is used to transmit the current to the vehicle motor. For example, the low pressure port 20 and the high pressure port 22 may be provided on the connecting portion 12 for a case where the third housing 3 may be located inside the connecting portion 12, and the low pressure port 20 and the high pressure port 22 may be provided on the third housing 3 for a case where the third housing 3 is located outside the connecting portion 12.

According to a second aspect of the present disclosure, the present disclosure provides a battery pack including a battery and the battery pack case 100 described above.

According to a third aspect of the present disclosure, there is provided a vehicle including the battery pack described above.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims (14)

1. A battery pack housing, comprising:

the battery heat management device comprises a first shell (1), wherein a containing cavity (13) for containing a battery is formed inside the first shell (1), the first shell (1) is provided with a battery heat management part (11), a flow channel (111) is formed in the battery heat management part (11), the flow channel (111) is suitable for a heat exchange medium to flow through, and the heat exchange medium is suitable for exchanging heat with the battery;

and the second shell (2) is positioned on the outer side of the battery thermal management part (11) and is connected with the battery thermal management part (11), and a first vacuum cavity (21) is formed between the second shell (2) and the battery thermal management part (11).

2. The battery pack case according to claim 1, wherein the first case (1) further has a connecting portion (12), the battery thermal management portion (11) and the connecting portion (12) together enclose the accommodating chamber (13), the battery pack case (100) further includes a third case (3), the third case (3) is located inside the connecting portion (12) or outside the connecting portion (12) and connected to the connecting portion (12), and a second vacuum chamber (31) is formed between the third case (3) and the connecting portion (12).

3. The battery pack case according to claim 2, wherein the first case (1) includes a battery tray (14) and a cover plate (15) covering the battery tray (14), the cover plate (15) being the battery thermal management section (11), the battery tray (14) being the connecting section (12).

4. The battery pack case of claim 3,

the second shell (2) is used for being connected with a vehicle body (4) of a vehicle or integrally formed with the vehicle body (4) of the vehicle;

or the third shell (3) is positioned at the outer side of the battery tray (14), and at least part of the third shell (3) is used for being connected with a vehicle body (4) of a vehicle or integrally formed with the vehicle body (4) of the vehicle;

or the third shell (3) is positioned on the outer side of the battery tray (14), and the second shell (2) and at least part of the third shell (3) are used for being connected with a vehicle body (4) of a vehicle or integrally formed with the vehicle body (4) of the vehicle.

5. The battery pack case according to any one of claims 2 to 4, wherein the second case (2) is formed with a first air vent communicating with the first vacuum chamber (21), the first air vent being adapted to be connected to a vacuum pumping device, the battery pack case (100) further comprising a first blocking structure adapted to block the first air vent;

the connecting portion (12) located outside the third shell (3) or the third shell (3) located outside the connecting portion (12) are formed with a second air hole (32), the second air hole (32) is communicated with the second vacuum cavity (31), the second air hole (32) is used for being connected with a vacuum pumping device, the battery pack shell (100) further comprises a second blocking structure (6), and the second blocking structure (6) is used for blocking the second air hole (32).

6. A battery pack housing according to any of claims 2-4, wherein a first support structure (7) is arranged in the first vacuum chamber (21), the first support structure (7) being connected between the second housing (2) and the battery thermal management section (11);

a second supporting structure (8) is arranged in the second vacuum cavity (31), and the second supporting structure (8) is connected between the third shell (3) and the connecting part (12).

7. A battery pack housing according to claim 6, wherein the first support structure (7) and the second support structure (8) are both made of a rubber material.

8. The battery pack case according to any one of claims 2 to 4, wherein a first mounting portion (24) is formed at an edge of the second case (2), a second mounting portion (114) is formed at an edge of the battery heat management portion (11), a third mounting portion (33) is formed at an edge of the third case (3), a fourth mounting portion (121) is formed at an edge of the connecting portion (12), and the first mounting portion (24), the second mounting portion (114), the third mounting portion (33), and the fourth mounting portion (121) are stacked and connected to each other.

9. A battery pack case according to claim 8, wherein a first sealant (10) is provided between the first mounting portion (24) and the second mounting portion (114), a second sealant (17) is provided between the third mounting portion (33) and the fourth mounting portion (121), and a third sealant (18) is provided between the second mounting portion (114) and the third mounting portion (33).

10. A battery pack housing according to any of claims 2-4, wherein a heat reflecting layer (9) is provided on at least one of the inner surface of the second housing (2), the inner surface of the third housing (3), the inner surface of the battery thermal management section (11), and the inner surface of the connection section (12).

11. A battery pack housing according to any of claims 2-4, wherein the second housing (2) is detachably connected to the battery thermal management section (11) and/or the third housing (3) is detachably connected to the connecting section (12).

12. Battery pack housing according to any of claims 1 to 4, further comprising a reinforcement beam (16), wherein the reinforcement beam (16) is arranged within the receiving cavity (13).

13. A battery pack comprising a battery and a battery pack housing according to any one of claims 1-12.

14. A vehicle characterized by comprising the battery pack according to claim 13.

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