Battery pack and energy storage device

Abstract

The utility model relates to the technical field of energy storage devices, in particular to a battery pack and an energy storage device.The battery pack comprises a battery module, a shell and a protective plate, a containing groove is formed in the shell, the battery module is installed in the containing groove, and the battery module, a bottom plate of the shell and the protective plate are sequentially arranged in the first direction; the protective plate is fixed on a bottom plate of the shell, a communication port penetrating through the bottom plate in the first direction is formed in the bottom plate, and the battery module and the protective plate are used for defining a solution cavity for cooling liquid to circulate. The utility model aims to provide a battery pack and an energy storage device aiming at at least one technical problem related in the prior art.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage devices, and in particular to a battery pack and an energy storage device. Background Art

[0002] With the continuous development of electric vehicles, the market share of electric vehicles is also increasing. At present, most battery packs are arranged under the vehicle chassis. It is inevitable that the bottom of the battery pack will be bumped during the use of the vehicle. Most solutions use a liquid cooling plate under the battery pack and add a bottom guard plate at the bottom of the liquid cooling plate to protect the battery pack, but this method will greatly increase the weight of the electric vehicle. Utility Model Content

[0003] The purpose of this application is to provide a battery pack and an energy storage device in response to at least one technical problem involved in the background technology.

[0004] In order to achieve the above objectives, this application adopts the following technical solutions:

[0005] One aspect of the present application provides a battery pack, including a battery module, a shell and a protective plate, wherein a receiving groove is formed on the shell, and the battery module is installed in the receiving groove. In a first direction, the battery module, the bottom plate of the shell and the protective plate are arranged in sequence, and the protective plate is fixed to the bottom plate of the shell. A connecting port is formed on the bottom plate and penetrates the bottom plate in the first direction, and the battery module and the protective plate are used to enclose a solution cavity for circulating a coolant.

[0006] Optionally, the shell further includes a side beam, and the side beam and the bottom plate enclose the accommodating groove, and the connecting port extends from the side beam on one side of the shell to the side beam on the other side in a second direction, and the second direction is perpendicular to the first direction.

[0007] The beneficial effect of this technical solution is that it enables the connecting port to have a larger size in the second direction, thereby enabling the battery module to have a larger area in contact with the coolant, thereby achieving a better cooling effect.

[0008] Optionally, the battery pack provided in the present application further includes a support plate, wherein the support plate is located between the bottom plate and the protective plate in the first direction, and the support plate is in contact with both the battery module and the protective plate in the first direction.

[0009] The beneficial effect of this technical solution is that by providing a support plate, the guard plate is not easy to collapse into the solution cavity when it is hit by the outside world, which further improves the strength of the battery pack and provides better protection for the battery module.

[0010] Optionally, the support plate is a corrugated plate.

[0011] The beneficial effect of this technical solution is that due to the gap formed between the concave part of the wave and the battery module and / or the protective plate, the support plate can provide appropriate space for the circulation of the coolant while playing a supporting role, and the wave structure can also absorb a certain tolerance and play a certain role in buffering vibrations.

[0012] Optionally, the support plate includes a module support portion in contact with the battery module, and a bottom plate support portion in contact with the bottom plate, the wave height of the wave structure in the module support portion is greater than the wave height of the wave structure in the bottom plate support portion, and the wave peaks on the plate surface of the support plate facing the guard plate are located on the same plane.

[0013] The beneficial effect of this technical solution is that when one side of the module support part contacts the module and the other side of the plate contacts the guard plate, and one side of the bottom plate support part contacts the bottom plate of the shell and the other side of the plate contacts the guard plate, the support plate will not produce significant deformation between the module support part and the bottom plate support part.

[0014] Optionally, the length direction of each wave structure of the support plate is the second direction, and each wave structure is arranged in a third direction. An opening is formed on the support plate, and the opening connects the module support part and the bottom plate support part in the third direction. The second direction and the third direction are both perpendicular to the first direction, and the second direction and the third direction are perpendicular to each other.

[0015] The beneficial effect of this technical solution is that, after the battery pack is assembled, a shunt channel connecting the module support portion and the bottom plate support portion is formed in the solution cavity through the opening, and the shunt channel can be used to shunt and guide the coolant.

[0016] Optionally, the base plate, the support plate and the guard plate are bonded in sequence.

[0017] The beneficial effect of this technical solution is that it is easy to disassemble and replace the guard plate and / or the support plate when they are damaged.

[0018] Optionally, the battery pack provided in the present application includes a plurality of battery modules, and the shell also includes a plurality of beams located in the accommodating slots, each of the beams is arranged in a third direction, the length direction of the beams is the second direction, each of the beams divides the accommodating slots into a plurality of installation slots, and each of the battery modules is installed one by one in each of the installation slots, the third direction is perpendicular to the first direction, and the second direction and the third direction are perpendicular to each other.

[0019] The beneficial effect of this technical solution is that the structural strength of the battery pack can be improved by the crossbeam, so that the shell can provide more reliable protection for the battery module.

[0020] Optionally, the battery pack provided in the present application further includes a water inlet pipe and a water outlet pipe both connected to the solution chamber; the battery pack further includes a temperature sensor, and the temperature sensor is installed on the water inlet pipe or the water outlet pipe;

[0021] And / or, the battery pack further includes a water pressure sensor, and the water pressure sensor is installed on the water inlet pipe or the water outlet pipe.

[0022] The beneficial effect of this technical solution is that the water temperature information obtained by the temperature sensor can be used to confirm the cooling performance of the battery module, and the water pressure information obtained by the water pressure sensor can be used to confirm the bottom protection performance. When impacted, the internal pressure of the coolant changes, and the impact intensity is confirmed according to the pressure size for real-time monitoring. At the same time, excessive impact and coolant leakage can also be monitored to avoid larger accidents.

[0023] Another aspect of the present application provides an electric vehicle, comprising the battery pack provided in the present application.

[0024] The technical solution provided by this application can achieve the following beneficial effects:

[0025] The battery pack and energy storage device provided in the present application, on the one hand, utilize the guard plate and the bottom plate of the shell to protect the battery module, thereby reducing the probability of direct collision between the bottom of the battery module and the outside world; on the other hand, the battery module and the guard plate participate in enclosing a solution cavity for circulation of the coolant, which not only enables the battery module to directly contact the coolant and improves the cooling effect on the battery module, but also, the top plate and bottom plate of the solution cavity originally enclosed by the liquid cooling plate are replaced by the battery module and the guard plate, and the top plate and bottom plate of the original liquid cooling plate are removed, thereby reducing the weight of the battery pack, and further reducing the weight of the electric vehicle using the battery pack, and also reducing the manufacturing cost of the battery pack and the electric vehicle using the battery pack.

[0026] The additional technical features and advantages of the present application will be more clearly explained in the following description, or can be understood through the specific practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the specific implementation methods of the present application, the following is a brief introduction to the drawings required for the description of the specific implementation methods. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 A schematic diagram of an exploded structure of a battery pack provided in an embodiment of the present application;

[0029] Figure 2 A schematic cross-sectional view of a battery pack according to an embodiment of the present application;

[0030] Figure 3 for Figure 2 A local enlarged schematic diagram of the middle A;

[0031] Figure 4 A schematic diagram of a three-dimensional structure of an implementation manner of a housing provided in an embodiment of the present application;

[0032] Figure 5 A partial structural schematic diagram of an implementation manner of a battery pack provided in an embodiment of the present application;

[0033] Figure 6 A schematic diagram of a three-dimensional structure of an implementation manner of a support plate provided in an embodiment of the present application;

[0034] Figure 7 A partial structural schematic diagram of an implementation manner of a battery pack provided in an embodiment of the present application;

[0035] Figure 8 A partial structural schematic diagram of an implementation of a battery pack provided in an embodiment of the present application.

[0036] Reference numerals:

[0037] 01-battery module; 02-water inlet pipe;

[0038] 03-shell; 04-support plate;

[0039] 05-guard plate; 06-water outlet pipe;

[0040] 07-Bottom plate; 08-Solution chamber;

[0041] 09-module support part; 10-bottom plate support part;

[0042] 11- cross beam; 12- side beam;

[0043] 13- small pallet; 14- large pallet;

[0044] 15- opening; 16- communication port;

[0045] 17- Temperature sensor; 18- Water pressure sensor. DETAILED DESCRIPTION

[0046] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0047] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0048] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0049] like Figures 1 to 8 As shown, one aspect of an embodiment of the present application provides a battery pack, including a battery module 01, a shell 03 and a protective plate 05, wherein a receiving groove is formed on the shell 03, and the battery module 01 is installed in the receiving groove, and in a first direction, the battery module 01, the bottom plate 07 of the shell 03 and the protective plate 05 are arranged in sequence, and the protective plate 05 is fixed to the bottom plate 07 of the shell 03, and a connecting port 16 is formed on the bottom plate 07 and penetrates the bottom plate 07 in the first direction, and the battery module 01 and the protective plate 05 are used to enclose a solution cavity 08 for circulating coolant.

[0050] It can be understood that in the embodiment of the present application, the direction in which the battery module 01, the bottom plate 07 of the shell 03 and the guard plate 05 are arranged in sequence is defined as a first direction; in the embodiment of the present application, the battery module 01 and the guard plate 05 are used to enclose a solution cavity 08 for circulation of the coolant, which can be understood as the solution cavity 08 can be enclosed by only the battery module 01 and the guard plate 05, or the solution cavity 08 can be enclosed by the battery module 01, the guard plate 05 and the bottom plate 07 of the shell 03, or the solution cavity 08 can be enclosed by the battery module 01, the guard plate 05, the bottom plate 07 of the shell 03 and the side walls of the receiving groove.

[0051] The battery pack provided in the present application, on the one hand, utilizes the guard plate 05 and the bottom plate 07 of the shell 03 to protect the battery module 01, thereby reducing the probability of direct collision between the bottom of the battery module 01 and the outside world. On the other hand, the battery module 01 and the guard plate 05 participate in enclosing a solution cavity 08 for circulating the coolant, which not only enables the battery module 01 to directly contact the coolant, thereby improving the cooling effect on the battery module 01, but also, the top plate and the bottom plate 07 of the solution cavity 08 of the original liquid cooling plate are replaced by the battery module 01 and the guard plate 05, and the top plate and the bottom plate 07 of the original liquid cooling plate are removed, thereby reducing the weight of the battery pack. The amount is reduced, thereby reducing the weight of the electric vehicle using the battery pack, and also reducing the production cost of the battery pack and the electric vehicle using the battery pack; at the same time, since the top plate and the bottom plate 07 of the original liquid cold plate are removed, the solution cavity 08 formed between the bottom plate 07 of the shell 03 and the guard plate 05 is larger, which can accommodate more coolant, which is beneficial to the uniform temperature and cooling of the battery module 01; in addition, when the bottom of the battery pack is subjected to external impact, the coolant in the solution cavity 08 can also play a certain supporting role on the guard plate 05 through hydraulic pressure, thereby playing a better protective role on the battery module 01.

[0052] Optionally, the housing 03 further includes a side beam 12, the side beam 12 and the bottom plate 07 enclose the receiving groove, and the communication port 16 extends from the side beam 12 on one side of the housing 03 to the side beam 12 on the other side in the second direction, and the second direction is perpendicular to the first direction. This allows the communication port 16 to have a larger size in the second direction, thereby allowing the battery module 01 to have a larger area in contact with the coolant, thereby obtaining a better cooling effect.

[0053] Optionally, the battery pack provided in the present application further includes a support plate 04, and in the first direction, the support plate 04 is located between the bottom plate 07 and the guard plate 05, and in the first direction, the support plate 04 is in contact with both the battery module 01 and the guard plate 05. By providing the support plate 04, the guard plate 05 is not easy to collapse into the solution cavity 08 when impacted by the outside world, thereby further improving the strength of the battery pack and providing better protection for the battery module 01.

[0054] Optionally, the support plate 04 is a wave plate. Since a gap is formed between the concave part of the wave and the battery module 01 and / or the guard plate 05, the support plate 04 can provide a suitable space for the circulation of the coolant while playing a supporting role, and the wave structure can also absorb a certain tolerance and play a certain role in buffering vibration. The support plate 04 is preferably made of elastic material, and the support plate 04 can be formed by injection molding of plastic parts.

[0055] Optionally, the support plate 04 includes a module support portion 09 in contact with the battery module 01, and a bottom plate support portion 10 in contact with the bottom plate 07, the wave height of the wave structure in the module support portion 09 is greater than the wave height of the wave structure in the bottom plate support portion 10, and the wave peaks on the plate surface of the support plate 04 facing the side of the guard plate 05 are located on the same plane. This ensures that when one side of the module support portion 09 contacts the module and the other side contacts the guard plate 05, and one side of the bottom plate support portion 10 contacts the bottom plate 07 of the shell 03 and the other side contacts the guard plate 05, the support plate 04 will not be greatly deformed between the module support portion 09 and the bottom plate support portion 10.

[0056] Optionally, the length direction of each wave structure of the support plate 04 is the second direction, and each of the wave structures is arranged in a third direction. An opening 15 is formed on the support plate 04, and the opening 15 connects the module support portion 09 and the bottom plate support portion 10 in the third direction. The second direction and the third direction are both perpendicular to the first direction, and the second direction and the third direction are perpendicular to each other. In this way, after the battery pack is assembled, a shunt channel connecting the module support portion 09 and the bottom plate support portion 10 will be formed in the solution chamber 08 through the opening 15, and the shunt channel can be used to shunt and guide the coolant. In the embodiment of the present application, there are preferably multiple openings 15, and each opening 15 is arranged in the second direction.

[0057] Optionally, the bottom plate 07, the support plate 04 and the guard plate 05 are bonded in sequence, so that the guard plate 05 and / or the support plate 04 can be easily disassembled and replaced when they are damaged.

[0058] Optionally, the battery pack provided by the present application includes a plurality of battery modules 01, and the shell 03 also includes a plurality of beams 11 located in the receiving slot, each of the beams 11 is arranged in a third direction, the length direction of the beam 11 is the second direction, each of the beams 11 divides the receiving slot into a plurality of installation slots, each of the battery modules 01 is installed in each of the installation slots one by one, the third direction is perpendicular to the first direction, and the second direction and the third direction are perpendicular to each other. The structural strength of the battery pack can be improved by the beams 11, so that the shell 03 can provide more reliable protection for the battery module 01. In the embodiment of the present application, the bottom plate 07 of the shell 03 is preferably composed of multiple large pallets 14 and multiple small pallets 13, and each large pallet 14 and each small pallet 13 are connected to the side beam 12. The large pallets 14 are used to support the cross beam 11 and the battery module 01, and the small pallets 13 are mainly used to support the battery module 01. The large pallets 14 and the small pallets 13 are preferably connected to the side beam 12 and the cross beam 11 by stir friction welding.

[0059] Preferably, the battery module 01 comprises a first battery cell, an elastic filling layer and a second battery cell stacked in sequence in a first direction. In this way, the elastic filling layer can fill the gap between the first battery cell and the second battery cell, so that the battery cells are not prone to relative movement and collision.

[0060] Optionally, the battery pack provided in the present application further includes a water inlet pipe 02 and a water outlet pipe 06 both connected to the solution chamber 08; the battery pack further includes a temperature sensor 17, and the temperature sensor 17 is installed on the water inlet pipe 02 or the water outlet pipe 06;

[0061] And / or, the battery pack further includes a water pressure sensor 18 , and the water pressure sensor 18 is installed on the water inlet pipe 02 or the water outlet pipe 06 .

[0062] That is to say, the embodiments of the present application include at least the following eight implementation modes:

[0063] In the first embodiment, the battery pack further includes a water inlet pipe 02 and a water outlet pipe 06 both connected to the solution chamber 08, and the battery pack further includes a temperature sensor 17, and the temperature sensor 17 is installed on the water inlet pipe 02;

[0064] The second embodiment is that the battery pack further includes a water inlet pipe 02 and a water outlet pipe 06 both connected to the solution chamber 08, and the battery pack further includes a temperature sensor 17, and the temperature sensor 17 is installed on the water outlet pipe 06;

[0065] The third embodiment is that the battery pack further includes a water inlet pipe 02 and a water outlet pipe 06 both connected to the solution chamber 08, and the battery pack further includes a water pressure sensor 18, and the water pressure sensor 18 is installed on the water inlet pipe 02;

[0066] The fourth embodiment is that the battery pack further includes a water inlet pipe 02 and a water outlet pipe 06 both connected to the solution chamber 08, and the battery pack further includes a water pressure sensor 18, and the water pressure sensor 18 is installed on the water outlet pipe 06;

[0067] The fifth embodiment is that the battery pack further includes a water inlet pipe 02 and a water outlet pipe 06 both connected to the solution chamber 08, the battery pack further includes a temperature sensor 17, the temperature sensor 17 is installed on the water inlet pipe 02, and the battery pack further includes a water pressure sensor 18, the water pressure sensor 18 is installed on the water inlet pipe 02;

[0068] The sixth embodiment is that the battery pack further includes a water inlet pipe 02 and a water outlet pipe 06 both connected to the solution chamber 08, the battery pack further includes a temperature sensor 17, the temperature sensor 17 is installed on the water inlet pipe 02, and the battery pack further includes a water pressure sensor 18, the water pressure sensor 18 is installed on the water outlet pipe 06;

[0069] The seventh embodiment is that the battery pack further includes a water inlet pipe 02 and a water outlet pipe 06 both connected to the solution chamber 08, the battery pack further includes a temperature sensor 17, the temperature sensor 17 is installed on the water outlet pipe 06, and the battery pack further includes a water pressure sensor 18, the water pressure sensor 18 is installed on the water inlet pipe 02;

[0070] The eighth embodiment is that the battery pack also includes a water inlet pipe 02 and a water outlet pipe 06 both connected to the solution chamber 08, the battery pack also includes a temperature sensor 17, the temperature sensor 17 is installed on the water outlet pipe 06, and the battery pack also includes a water pressure sensor 18, the water pressure sensor 18 is installed on the water outlet pipe 06.

[0071] In this way, the water temperature information obtained by the temperature sensor 17 can be used to confirm the cooling performance of the battery module 01, and the water pressure information obtained by the water pressure sensor 18 can be used to confirm the bottom protection performance. When impacted, the internal pressure of the coolant changes, and the impact strength is confirmed according to the pressure size for real-time monitoring. At the same time, the coolant leakage due to excessive impact can also be monitored to avoid greater accidents. Preferably, each sensor is located at the connecting port 16 where each water pipe is connected to the solution chamber 08.

[0072] Another aspect of the embodiments of the present application provides an electric vehicle, comprising the battery pack provided in the embodiments of the present application.

[0073] The electric vehicle provided in the present application adopts the battery pack provided in the present application. On the one hand, the battery module 01 is protected by the guard plate 05 and the bottom plate 07 of the shell 03 to reduce the probability of direct collision between the bottom of the battery module 01 and the outside world. On the other hand, the battery module 01 and the guard plate 05 participate in enclosing a solution cavity 08 for circulating the coolant, which not only enables the battery module 01 to directly contact the coolant and improves the cooling effect on the battery module 01, but also, the top plate and bottom plate 07 of the solution cavity 08 of the original liquid cooling plate are replaced by the battery module 01 and the guard plate 05, and the top plate and bottom plate 07 of the original liquid cooling plate are removed, thereby reducing The weight of the battery pack is reduced, and thus the weight of the electric vehicle using the battery pack is also reduced, and the production cost of the battery pack and the electric vehicle using the battery pack is also reduced; at the same time, since the top plate and the bottom plate 07 of the original liquid cold plate are removed, the solution cavity 08 formed between the bottom plate 07 of the shell 03 and the protective plate 05 is made larger, which can accommodate more coolant, which is beneficial to the uniform temperature and cooling of the battery module 01; in addition, when the bottom of the battery pack is subjected to external impact, the coolant in the solution cavity 08 can also provide a certain support to the protective plate 05 through hydraulic pressure, thereby providing better protection for the battery module 01.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery pack, characterized in that: It includes a battery module, a shell and a protective plate. A receiving groove is formed on the shell, and the battery module is installed in the receiving groove. In a first direction, the battery module, the bottom plate of the shell and the protective plate are arranged in sequence. The protective plate is fixed to the bottom plate of the shell. A connecting port is formed on the bottom plate and penetrates the bottom plate in the first direction. The battery module and the protective plate are used to enclose a solution cavity for circulating coolant.

2. The battery pack according to claim 1, characterized in that: The shell further includes a side beam, and the side beam and the bottom plate enclose the accommodating groove. In a second direction, the connecting port extends from the side beam on one side of the shell to the side beam on the other side, and the second direction is perpendicular to the first direction.

3. The battery pack according to claim 1, characterized in that: It also includes a support plate, which is located between the bottom plate and the guard plate in the first direction, and is in contact with both the battery module and the guard plate in the first direction.

4. The battery pack according to claim 3, characterized in that: The supporting plate is a corrugated plate.

5. The battery pack according to claim 4, characterized in that: The support plate includes a module support portion in contact with the battery module and a bottom plate support portion in contact with the bottom plate, the wave height of the wave structure in the module support portion is greater than the wave height of the wave structure in the bottom plate support portion, and the wave peaks on the plate surface of the support plate facing the guard plate are located on the same plane.

6. The battery pack according to claim 5, characterized in that: The length direction of each wave structure of the support plate is the second direction, and each wave structure is arranged in a third direction. An opening is formed on the support plate, and the opening connects the module support part and the bottom plate support part in the third direction. The second direction and the third direction are both perpendicular to the first direction, and the second direction and the third direction are perpendicular to each other.

7. The battery pack according to claim 3, characterized in that: The bottom plate, the support plate and the guard plate are bonded in sequence.

8. The battery pack according to claim 2, characterized in that: It includes multiple battery modules, and the shell also includes multiple beams located in the accommodating groove, each of the beams is arranged in a third direction, the length direction of the beam is the second direction, each of the beams divides the accommodating groove into multiple installation grooves, and each of the battery modules is installed in each of the installation grooves one by one, the third direction is perpendicular to the first direction, and the second direction and the third direction are perpendicular to each other.

9. The battery pack according to any one of claims 1 to 8, characterized in that: It also includes a water inlet pipe and a water outlet pipe both connected to the solution chamber; the battery pack also includes a temperature sensor, and the temperature sensor is installed on the water inlet pipe or the water outlet pipe; And / or, the battery pack further includes a water pressure sensor, and the water pressure sensor is installed on the water inlet pipe or the water outlet pipe.

10. An energy storage device, characterized in that Comprising a battery pack as claimed in any one of claims 1 to 9.

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