Battery pack thermal management system and battery pack

Abstract

The utility model relates to the technical field of battery heat management, and discloses a battery pack heat management system and a battery pack, the battery pack heat management system comprises a first heat exchange system and a second heat exchange system; the first heat exchange system comprises a first heat exchange plate, a first heat exchange loop and a first connecting pipeline, the first heat exchange plate is arranged on one side of each battery module, the first heat exchange loop is connected with the first connecting pipeline, and the first connecting pipeline is provided with a first interface; the second heat exchange system comprises a second heat exchange plate, a second heat exchange loop and a second connecting pipeline, the second heat exchange plate is arranged on the other opposite side of the battery module, the second heat exchange loop is connected with the second connecting pipeline, the second connecting pipeline is provided with a second connector, and the first connector and the second connector are suitable for being connected with the heat exchange device. According to the utility model, under different working environments of the battery pack, the first heat exchange system and the second heat exchange system are switched to be connected with the heat exchange device, so that not only can the quick heat dissipation requirement be met, but also the heat exchange loss can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery thermal management, and in particular to a battery pack thermal management system and a battery pack. Background Art

[0002] In order to improve charging efficiency, electric vehicles generally choose a high-rate fast charging method. However, fast charging tends to generate a lot of heat and affect the service life and safety of the battery pack. Therefore, the battery pack temperature needs to be managed through a battery pack thermal management system.

[0003] To meet the heat dissipation requirements of the battery pack in fast-charging mode, existing battery pack thermal management systems use multi-faceted, high-power cooling. However, during normal vehicle operation or conventional charging, excessive cooling power is not required. However, high-power cooling increases the heat exchange load on the heat exchange pipes, which can easily increase heat exchange losses. In other words, existing battery pack cooling systems cannot simultaneously achieve rapid heat dissipation in fast-charging mode and reduce heat exchange losses during normal vehicle operation or conventional charging. Utility Model Content

[0004] In view of this, the present invention provides a battery pack thermal management system and a battery pack to solve the problem that the existing battery pack heat dissipation system cannot take into account both rapid heat dissipation and reduced heat exchange loss.

[0005] In a first aspect, the present invention provides a battery module cooling device, wherein the battery pack includes at least one battery module, and the battery pack thermal management system includes:

[0006] a first heat exchange system comprising a first heat exchange plate, a first heat exchange circuit, and a first connecting pipe, wherein the first heat exchange plate is disposed on one side of each battery module, the first heat exchange circuit is disposed on the first heat exchange plate and connected to the first connecting pipe, and the first connecting pipe extends outside the battery pack housing and is provided with a first interface;

[0007] The second heat exchange system includes a second heat exchange plate, a second heat exchange circuit and a second connecting pipe. The second heat exchange plate is arranged on the other side opposite to the battery module. The second heat exchange circuit is arranged on the second heat exchange plate and connected to the second connecting pipe. The second connecting pipe extends to the outside of the battery pack shell and is provided with a second interface. The first interface and the second interface are respectively suitable for connecting to the heat exchange device.

[0008] Beneficial effects: The battery pack thermal management system provided by the present invention, when in use, selects in advance the first interface or the second interface to connect to the heat exchange device according to the heat dissipation requirements of the battery pack. The heat exchange device inputs the heat exchange medium into the first heat exchange circuit through the first interface via the first connecting pipe or into the second heat exchange circuit through the second interface via the second connecting pipe to achieve heat dissipation of the battery pack. When the heat dissipation requirements of the battery pack are low, such as when the vehicle is driving normally and charging normally, one of the heat exchange systems is used to dissipate heat for the battery pack, and the other heat exchange system is idle and does not pass heat exchange medium to reduce heat exchange losses. When the heat dissipation requirements of the battery pack are high, such as in fast charging mode, the other heat exchange system or two heat exchange systems are used to dissipate heat for the battery pack at the same time to meet the heat dissipation requirements of the fast charging mode, thereby achieving both rapid heat dissipation and reduced heat exchange losses.

[0009] In an optional embodiment, the battery pack includes a plurality of stacked battery modules, the first heat exchange plate and the second heat exchange plate are alternately arranged along the stacking direction of the plurality of battery modules, and the first heat exchange plate or the second heat exchange plate is shared between adjacent battery modules.

[0010] Beneficial effect: When multiple battery modules are provided, the first heat exchange plate and the second heat exchange plate are alternately arranged along the stacking direction of the multiple battery modules, so that the first heat exchange plate or the second heat exchange plate can evenly dissipate heat from the battery pack, and the first heat exchange plate or the second heat exchange plate can be shared between adjacent battery modules to reduce the cost of use.

[0011] In an optional embodiment, a plurality of first heat exchange plates are provided, and the plurality of first connecting pipes are connected and share one first interface;

[0012] And / or, a plurality of second heat exchange plates are provided, and the plurality of second connecting pipes are connected and share one second interface.

[0013] Beneficial Effects: When multiple first heat exchange plates are provided, multiple first connecting pipes are connected and share a single first interface. The heat exchange device only needs to connect to the single first interface to transport the heat exchange medium to the multiple first connecting pipes and then to the multiple first heat exchange circuits, which facilitates use and helps reduce usage costs. Similarly, when multiple second heat exchange plates are provided, multiple second connecting pipes are connected and share a single second interface. The heat exchange device only needs to connect to the single second interface to transport the heat exchange medium to the multiple second connecting pipes and then to the multiple second heat exchange circuits.

[0014] In an optional embodiment, the first heat exchange plate and / or the second heat exchange plate located at the outermost side constitute a shell side plate of the battery pack.

[0015] Beneficial effect: Using the outermost first heat exchange plate and / or the second heat exchange plate as the shell side plate of the battery pack can save manufacturing costs.

[0016] In an optional embodiment, a bridging circuit is further included, wherein the first connecting pipeline and the second connecting pipeline are connected via the bridging circuit, and a switching valve is provided on the bridging circuit.

[0017] Beneficial Effect: The first connecting line and the second connecting line are connected by a bridge circuit, and the on-off valve can control the connection and disconnection of the first connecting line and the second connecting line. When the first connecting line is connected to the heat exchange device, after the on-off valve is opened, the heat exchange device can simultaneously transfer the heat exchange medium to the second connecting line via the bridge circuit, allowing the first and second heat exchange circuits to operate simultaneously, thereby achieving more efficient heat dissipation. Similarly, when the second connecting line is connected to the heat exchange device, after the on-off valve is opened, the heat exchange device can simultaneously transfer the heat exchange medium to the first connecting line via the bridge circuit.

[0018] In an optional embodiment, the heat exchange device includes an in-vehicle heat exchange device and an out-vehicle heat exchange device, the first interface is connected to one of the in-vehicle heat exchange device and the out-vehicle heat exchange device, and the second interface is connected to the other one.

[0019] Beneficial effect: The first heat exchange system and the second heat exchange system are respectively connected to the in-vehicle heat exchange device and the out-vehicle heat exchange device. The first heat exchange system and the second heat exchange system are independent of each other, so the in-vehicle heat exchange device and the out-vehicle heat exchange device can be prevented from being connected to each other, thereby avoiding mutual contamination of the heat exchange medium in the in-vehicle heat exchange device and the out-vehicle heat exchange device.

[0020] In an optional embodiment, the interface of the first interface or the second interface connected to the off-vehicle heat exchange device is a self-locking closed quick-connect connector.

[0021] Beneficial effect: It is connected to the off-vehicle heat exchange device through a self-locking closed quick-plug connector for quick connection and disassembly, and has good sealing performance, which can prevent leakage of the heat exchange medium.

[0022] In an optional embodiment, the first heat exchange circuit is arranged in a winding manner inside the first heat exchange plate, and the second heat exchange circuit is arranged in a winding manner inside the second heat exchange plate.

[0023] Beneficial Effects: The first heat exchange circuit is arranged in a zigzag pattern within the first heat exchange plate, which can increase the heat exchange area of ​​the first heat exchange circuit and improve the heat exchange effect of the first heat exchange circuit on the battery pack. Similarly, the second heat exchange circuit is arranged in a zigzag pattern within the second heat exchange plate, which can increase the heat exchange area of ​​the second heat exchange circuit and improve the heat exchange effect of the second heat exchange circuit on the battery pack.

[0024] In an optional embodiment, the first heat exchange plate and the second heat exchange plate are respectively fixedly bonded to the battery module by thermally conductive adhesive, and insulating layers are respectively provided at the connections between the first heat exchange plate and the second heat exchange plate and the battery module.

[0025] Beneficial effects: The first heat exchange plate and the second heat exchange plate are fixedly bonded to the battery module by thermally conductive adhesive to improve the heat exchange effect and the installation stability of the first heat exchange plate and the second heat exchange plate. The connections between the first heat exchange plate and the second heat exchange plate and the battery module are respectively provided with an insulating layer for insulation treatment.

[0026] In a second aspect, the present invention further provides a battery pack, comprising: at least one battery module and the above-mentioned battery pack thermal management system.

[0027] Beneficial Effects: Because the battery pack includes a battery pack thermal management system, it has the same effect as the battery pack thermal management system, that is, the heat exchange device inputs the heat exchange medium into the first heat exchange circuit or the second heat exchange circuit through the first interface or the second interface to achieve heat dissipation of the battery pack. When the heat dissipation demand of the battery pack is low, such as when the vehicle is driving normally and charging normally, one of the heat exchange systems is used to dissipate heat from the battery pack, and the other heat exchange system is idle and does not pass heat exchange medium to reduce heat exchange losses. When the heat dissipation demand of the battery pack is high, such as in fast charging mode, the other heat exchange system or both heat exchange systems are used to dissipate heat from the battery pack at the same time to meet the heat dissipation demand of fast charging mode, thereby achieving both rapid heat dissipation and reduced heat exchange losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 This is a schematic structural diagram of a battery pack thermal management system according to an embodiment of the present utility model;

[0030] Figure 2 This is a schematic structural diagram of a battery pack thermal management system according to another embodiment of the present invention;

[0031] Figure 3 This is a schematic structural diagram of a battery pack according to an embodiment of the present utility model;

[0032] Figure 4 This is a schematic diagram of the internal structure of a battery pack according to an embodiment of the present utility model;

[0033] Figure 5 This is a schematic diagram of the partial structure of a battery pack according to an embodiment of the present utility model.

[0034] Description of reference numerals:

[0035] 1. First heat exchange system; 101. First heat exchange plate; 102. First heat exchange circuit; 103. First connecting pipeline; 2. First interface; 3. Second heat exchange system; 301. Second heat exchange plate; 302. Second heat exchange circuit; 303. Second connecting pipeline; 4. Second interface; 5. Heat exchange device; 501. In-vehicle heat exchange device; 502. Out-vehicle heat exchange device; 6. Battery pack; 7. Battery module; 8. Bridging circuit; 9. Switch valve. DETAILED DESCRIPTION

[0036] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, 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 embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0037] The following combination Figures 1 to 5 , describing the embodiments of the present utility model.

[0038] According to an embodiment of the present invention, on the one hand, Figure 1 As shown, a battery module cooling device is provided. The battery pack 6 includes at least one battery module 7. The battery pack thermal management system mainly includes: a first heat exchange system 1 and a second heat exchange system 3. The first heat exchange system 1 includes a first heat exchange plate 101, a first heat exchange loop 102, and a first connecting pipe 103. The first heat exchange plate 101 is disposed on one side of each battery module 7. The first heat exchange loop 102 is disposed on the first heat exchange plate 101 and connected to the first connecting pipe 103. The first connecting pipe 103 extends outside the housing of the battery pack 6 and is provided with a first interface 2. The second heat exchange system 3 includes a second heat exchange plate 301, a second heat exchange loop 302, and a second connecting pipe 303. The second heat exchange plate 301 is disposed on the opposite side of the battery module 7. The second heat exchange loop 302 is disposed on the second heat exchange plate 301 and connected to the second connecting pipe 303. The second connecting pipe 303 extends outside the housing of the battery pack 6 and is provided with a second interface 4. The first interface 2 and the second interface 4 are respectively suitable for connecting to a heat exchange device 5.

[0039] It can be seen that the battery pack thermal management system provided by the embodiment of the present invention, when in use, selects in advance the first interface 2 or the second interface 4 to connect to the heat exchange device 5 according to the heat dissipation requirements of the battery pack 6. The heat exchange device 5 inputs the heat exchange medium into the first heat exchange circuit 102 through the first interface 2 via the first connecting pipe 103 or into the second heat exchange circuit 302 through the second interface 4 via the second connecting pipe 303 to achieve heat dissipation of the battery pack 6. When the heat dissipation requirements of the battery pack 6 are relatively low, such as when the vehicle is driving normally and charging normally, one of the heat exchange systems is used to dissipate heat for the battery pack 6, and the other heat exchange system is idle and does not pass heat exchange medium to reduce heat exchange losses. When the heat dissipation requirements of the battery pack 6 are relatively high, such as in fast charging mode, the other heat exchange system or two heat exchange systems are used to dissipate heat for the battery pack 6 at the same time to meet the heat dissipation requirements of the fast charging mode, thereby achieving both rapid heat dissipation and reduced heat exchange losses.

[0040] Specifically, the first heat exchange loop 102 and the second heat exchange loop 302 can flow heat exchange media of different temperatures as needed to achieve heating or cooling of the battery pack 6. The heat exchange medium can be any existing heat exchange medium, such as cooling water, air, etc.

[0041] Specifically, if Figure 3 As shown, the first heat exchange circuit 102 and the second heat exchange circuit 302 are each provided with an inlet and an outlet. The inlet and outlet of the first heat exchange circuit 102 are each connected to a first connecting pipe 103, and the two first connecting pipes 103 are each provided with a first port 2. Similarly, the inlet and outlet of the second heat exchange circuit 302 are each connected to a second connecting pipe 303, and the two second connecting pipes 303 are each provided with a second port 4.

[0042] It should be noted that the present embodiment does not limit the number of battery modules 7 within the battery pack 6 , and one, two, or more battery modules may be selected as needed. For example, when there is only one battery module 7 , the first heat exchange plate 101 and the second heat exchange plate 301 are respectively disposed on opposite sides of the battery module 7 .

[0043] In one embodiment, Figure 4 As shown, the battery pack 6 includes multiple stacked battery modules 7, the first heat exchange plates 101 and the second heat exchange plates 301 are alternately arranged along the stacking direction of the multiple battery modules 7, and adjacent battery modules 7 share the first heat exchange plate 101 or the second heat exchange plate 301.

[0044] When multiple battery modules 7 are provided, the first heat exchange plate 101 and the second heat exchange plate 301 are alternately arranged along the stacking direction of the multiple battery modules 7, so that the first heat exchange plate 101 or the second heat exchange plate 301 can evenly dissipate heat from the battery pack 6, and the first heat exchange plate 101 or the second heat exchange plate 301 is shared between adjacent battery modules 7 to reduce the cost of use.

[0045] For example, Figure 4 As shown, the battery pack 6 includes two stacked battery modules 7. A first heat exchange plate 101 is disposed between the two battery modules 7, and a pair of second heat exchange plates 301 are disposed on opposite sides of the battery pack 6, namely, on the top of the upper battery module 7 and the bottom of the lower battery module 7.

[0046] Furthermore, in one embodiment, multiple first heat exchange plates 101 are provided, and multiple first connecting pipes 103 are connected and share a single first interface 2. When multiple first heat exchange plates 101 are provided, multiple first connecting pipes 103 are connected and share a single first interface 2. The heat exchange device 5 only needs to be connected to one first interface 2 to transport the heat exchange medium to multiple first connecting pipes 103 and then to multiple first heat exchange circuits 102, which is convenient to use and helps reduce usage costs.

[0047] And / or, multiple second heat exchange plates 301 are provided, and the multiple second connecting pipes 303 are connected and share a second interface 4. Similarly, when multiple second heat exchange plates 301 are provided, the multiple second connecting pipes 303 are connected and share a second interface 4. The heat exchange device 5 only needs to be connected to one second interface 4 to transport the heat exchange medium to the multiple second connecting pipes 303 and then to the multiple second heat exchange circuits 302.

[0048] In one embodiment, the outermost first heat exchange plate 101 and / or the second heat exchange plate 301 constitute the shell side plate of the battery pack 6. Using the outermost first heat exchange plate 101 and / or the second heat exchange plate 301 as the shell side plate of the battery pack 6 can save manufacturing costs. Figure 3 and Figure 4 As shown, taking two battery modules 7 as an example, a pair of second heat exchange plates 301 located on the outside serve as the shell side plates of the battery pack 6 .

[0049] In addition, the battery module 7 adopts a double-sided output pole form, so as to facilitate the fixed bonding of the first heat exchange plate 101 or the second heat exchange plate 301 located on the outermost side.

[0050] In one embodiment, Figure 2 and Figure 3As shown, the battery pack thermal management system also includes a bridge circuit 8, through which the first connecting line 103 and the second connecting line 303 are connected, and a switch valve 9 is provided on the bridge circuit 8. The first connecting line 103 and the second connecting line 303 are connected through the bridge circuit 8, and the switch valve 9 can control the connection and disconnection of the first connecting line 103 and the second connecting line 303. When the first connecting line 103 is connected to the heat exchange device 5, after the switch valve 9 is opened, the heat exchange device 5 can simultaneously transfer the heat exchange medium to the second connecting line 303 through the bridge circuit 8, so that the first heat exchange circuit 102 and the second heat exchange circuit 302 operate simultaneously, thereby achieving more efficient heat dissipation. Similarly, when the second connecting line 303 is connected to the heat exchange device 5, after the switch valve 9 is opened, the heat exchange device 5 can simultaneously transfer the heat exchange medium to the first connecting line 103 through the bridge circuit 8.

[0051] It should be noted that the embodiment of the present invention does not limit the structure of the switch valve 9, and any existing structure can be selected as needed. For example, the switch valve 9 is an electrically controlled valve or a mechanical valve. The electrically controlled valve can be opened automatically for use, and the mechanical valve can be opened manually to reduce the cost of use.

[0052] In one embodiment, Figure 1 and Figure 2 As shown, the heat exchange device 5 includes an in-vehicle heat exchange device 501 and an out-vehicle heat exchange device 502. The first interface 2 is connected to one of the in-vehicle heat exchange device 501 and the out-vehicle heat exchange device 502, and the second interface 4 is connected to the other. The first heat exchange system 1 and the second heat exchange system 3 are connected to the in-vehicle heat exchange device 501 and the out-vehicle heat exchange device 502, respectively. The first heat exchange system 1 and the second heat exchange system 3 are independent of each other, thereby preventing the in-vehicle heat exchange device 501 and the out-vehicle heat exchange device 502 from communicating with each other, thereby preventing the heat exchange medium in the in-vehicle heat exchange device 501 and the out-vehicle heat exchange device 502 from contaminating each other.

[0053] For example, Figure 1 and Figure 2 As shown, the first interface 2 is connected to the in-vehicle heat exchange device 501 , and the second interface 4 is connected to the out-vehicle heat exchange device 502 .

[0054] In one embodiment, the interface between the first interface 2 or the second interface 4 and the external heat exchange device 502 is a self-locking, closed quick-connect connector. The self-locking, closed quick-connect connector allows for quick connection and removal of the external heat exchange device 502, and provides good sealing to prevent leakage of the heat exchange medium.

[0055] Furthermore, the interface connected to the in-vehicle heat exchange device 501 can be selected from existing conventional connectors as needed, and the embodiments of the present invention do not impose too many restrictions on this.

[0056] In one embodiment, Figure 5 As shown, the first heat exchange loop 102 is arranged in a zigzag manner within the first heat exchange plate 101, which can increase the heat exchange area of ​​the first heat exchange loop 102 and improve the heat exchange effect of the first heat exchange loop 102 on the battery pack 6. The second heat exchange loop 302 is arranged in a zigzag manner within the second heat exchange plate 301, which can increase the heat exchange area of ​​the second heat exchange loop 302 and improve the heat exchange effect of the second heat exchange loop 302 on the battery pack 6.

[0057] In one embodiment, the first heat exchange plate 101 and the second heat exchange plate 301 are respectively fixedly bonded to the battery module 7 using thermally conductive adhesive to improve the heat exchange effect and enhance the installation stability of the first heat exchange plate 101 and the second heat exchange plate 301. The connection between the first heat exchange plate 101 and the second heat exchange plate 301 and the battery module 7 is provided with an insulating layer for insulation.

[0058] Specifically, the contact surfaces of the first heat exchange plate 101 and the second heat exchange plate 301 with the battery module 7 are covered with an insulating film or coated with an insulating coating.

[0059] Furthermore, if Figure 2 As shown, when the first heat exchange plate 101 is located between two battery modules 7, the upper and lower surfaces of the first heat exchange plate 101 are simultaneously bonded and fixed to the two battery modules 7. Similarly, when the second heat exchange plate 301 is located between two battery modules 7, the upper and lower surfaces of the second heat exchange plate 301 are simultaneously bonded and fixed to the two battery modules 7.

[0060] The working principle of the embodiment of the utility model is as follows:

[0061] like Figure 2 As shown, the example of two battery modules 7 is used for illustration. The first heat exchange plate 101 is arranged between the two battery modules 7 , and a pair of second heat exchange plates 301 are respectively arranged on opposite sides of the battery pack 6 , i.e., outside the two battery modules 7 .

[0062] During normal vehicle driving or conventional charging, if the expected heat generation power of the battery pack 6 without heat exchange is less than a first preset threshold value (e.g., 0kW to 1kW), then the heat exchange device 5 does not need to be connected. If the expected heat generation power of the battery pack 6 without heat exchange is greater than a second preset threshold value and less than a third preset threshold value (e.g., 0.5kW to 2kW, or 2kW to 4kW), then the in-vehicle heat exchange device 501 is connected via the first interface 2, and the first heat exchange circuit 102 dissipates heat from the battery pack 6. Alternatively, by opening the on-off valve 9, the in-vehicle heat exchange device 501 simultaneously inputs heat exchange medium into the first heat exchange circuit 102 and the pair of second heat exchange circuits 302 to dissipate heat from the battery pack 6.

[0063] During high-rate charging or when the battery pack 6 is not expected to be heated, if the heat generation power exceeds a third preset threshold, the battery pack 6 is cooled by the pair of second heat exchange loops 302 and connected to the off-board heat exchange device 502 via the second interface 4. Alternatively, the on-off valve 9 is opened, and the off-board heat exchange device 502 simultaneously inputs the heat exchange medium into the first heat exchange loop 102 and the pair of second heat exchange loops 302 to cool the battery pack 6.

[0064] In the case of ultra-high rate charging or when the battery pack 6 is expected to have no heat exchange, the heating power exceeds the fourth preset threshold, for example, 2kW to 5kW, then the first interface 2 is connected to the in-vehicle heat exchange device 501, and the second interface 4 is connected to the out-vehicle heat exchange device 502, and at the same time, the first heat exchange circuit 102 and a pair of second heat exchange circuits 302 are used to dissipate heat for the battery pack 6.

[0065] According to an embodiment of the present invention, on the other hand, Figure 3 As shown, a battery pack 6 is also provided, which mainly includes: at least one battery module 7 and the above-mentioned battery pack thermal management system.

[0066] Because the battery pack 6 includes a battery module cooling device, it has the same effect as the battery module cooling device, that is, the heat exchange device 5 inputs the heat exchange medium into the first heat exchange loop 102 or the second heat exchange loop 302 through the first interface 2 or the second interface 4 to achieve heat dissipation of the battery pack 6. When the heat dissipation demand of the battery pack 6 is low, such as when the vehicle is driving normally and charging normally, one of the heat exchange systems is used to dissipate heat from the battery pack 6, and the other heat exchange system is idle and does not pass heat exchange medium to reduce heat exchange losses. When the heat dissipation demand of the battery pack 6 is high, such as in fast charging mode, the other heat exchange system or two heat exchange systems are used to dissipate heat from the battery pack 6 at the same time to meet the heat dissipation demand of the fast charging mode, thereby achieving both rapid heat dissipation and reduced heat exchange losses.

[0067] It should be noted that the battery pack 6 of the present invention is used for vehicles, which may refer to large vehicles, small vehicles, special vehicles, etc. For example, according to the vehicle model, the vehicle of the embodiment of the present invention may be a sedan model, an off-road model, a multi-purpose vehicle (MPV) model or other models.

[0068] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations shall fall within the scope defined by the appended claims.

Claims

1. A battery pack thermal management system, the battery pack comprising at least one battery module, characterized in that: The battery pack thermal management system includes: a first heat exchange system comprising a first heat exchange plate, a first heat exchange circuit, and a first connecting pipe, wherein the first heat exchange plate is disposed on one side of each battery module, the first heat exchange circuit is disposed on the first heat exchange plate and connected to the first connecting pipe, and the first connecting pipe extends outside the battery pack housing and is provided with a first interface; The second heat exchange system includes a second heat exchange plate, a second heat exchange circuit and a second connecting pipe. The second heat exchange plate is arranged on the other side opposite to the battery module. The second heat exchange circuit is arranged on the second heat exchange plate and connected to the second connecting pipe. The second connecting pipe extends to the outside of the battery pack shell and is provided with a second interface. The first interface and the second interface are respectively suitable for connecting to the heat exchange device.

2. The battery pack thermal management system according to claim 1, characterized in that: The battery pack includes a plurality of stacked battery modules. The first heat exchange plates and the second heat exchange plates are alternately arranged along the stacking direction of the plurality of battery modules. Adjacent battery modules share the first heat exchange plate or the second heat exchange plate.

3. The battery pack thermal management system according to claim 2, characterized in that: A plurality of first heat exchange plates are provided, and the plurality of first connecting pipes are connected and share one first interface; And / or, a plurality of second heat exchange plates are provided, and the plurality of second connecting pipes are connected and share one second interface.

4. The battery pack thermal management system according to claim 1, characterized in that: The first heat exchange plate and / or the second heat exchange plate located at the outermost side constitute the shell side plate of the battery pack.

5. The battery pack thermal management system according to any one of claims 1 to 4, characterized in that: It also includes a bridging circuit, the first connecting pipeline and the second connecting pipeline are connected through the bridging circuit, and the bridging circuit is provided with a switch valve.

6. The battery pack thermal management system according to any one of claims 1 to 4, characterized in that: The heat exchange device includes an in-vehicle heat exchange device and an out-vehicle heat exchange device, the first interface is connected to one of the in-vehicle heat exchange device and the out-vehicle heat exchange device, and the second interface is connected to the other one.

7. The battery pack thermal management system according to claim 6, characterized in that: The interface of the first interface or the second interface connected to the off-vehicle heat exchange device is a self-locking closed quick-plug connector.

8. The battery pack thermal management system according to any one of claims 1 to 4, characterized in that: The first heat exchange circuit is arranged in a winding manner inside the first heat exchange plate, and the second heat exchange circuit is arranged in a winding manner inside the second heat exchange plate.

9. The battery pack thermal management system according to any one of claims 1 to 4, characterized in that: The first heat exchange plate and the second heat exchange plate are fixedly bonded to the battery module by heat conductive adhesive, and insulating layers are provided at the connections between the first heat exchange plate and the second heat exchange plate and the battery module.

10. A battery pack, characterized in that: include: At least one battery module and the battery pack thermal management system according to any one of claims 1 to 9.

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