WO2023040067A1

WO2023040067A1 - Household energy storage system

Info

Publication number: WO2023040067A1
Application number: PCT/CN2021/135379
Authority: WO
Inventors: 鬲新海; 王大庆; 宋海生; 肖刚; 刘正华
Original assignee: 深圳市富兰瓦时技术有限公司
Priority date: 2021-09-15
Filing date: 2021-12-03
Publication date: 2023-03-23
Also published as: CN113852154A

Abstract

Disclosed in the embodiments of the present invention is a household energy storage system. The household energy storage system comprises: a case shell, wherein the case shell comprises a bottom plate and a back plate. The household energy storage system further comprises: an energy storage unit, a battery management unit and an inversion unit, which are located in the case shell and are sequentially located on a side of the bottom plate; and a heat dissipation channel, which is located outside the case shell and located on a side of the back plate, wherein the heat dissipation channel is arranged corresponding to the energy storage unit. The auxiliary heat dissipation channel is arranged outside the case shell, and works in cooperation with the natural heat dissipation performance of the energy storage unit, the battery management unit and the inversion unit, so that the overall heat dissipation performance of the system is improved, and the safety of the system is improved.

Description

A home energy storage system

technical field

Embodiments of the present invention relate to the technical field of energy storage, and in particular to a household energy storage system.

Background technique

At present, home energy storage products are mostly system products composed of split, modular or simple integration. It is mainly reflected in the independence of the energy storage inverter, the independence of the energy storage battery pack, and even the independence of the battery management system. These components are integrated into system products through system development; It needs to be stacked in series and parallel to form. However, since the heat dissipation modules in home energy storage products are independent of each other, and most of them use natural heat dissipation, the system heat dissipation effect is poor, affecting the overall service life of the system, and seriously affecting the practical experience of customers.

Contents of the invention

An embodiment of the present invention provides a home energy storage system to improve the overall heat dissipation capability of the system and improve system security.

An embodiment of the present invention provides a household energy storage system, comprising: a case housing, the case housing including a bottom plate and a back plate;

The home energy storage system also includes an energy storage unit, a battery management unit, and an inverter unit located inside the chassis casing and on one side of the bottom plate in turn, and an energy storage unit located outside the chassis casing and on one side of the backplane cooling channels;

The heat dissipation channel is set corresponding to the energy storage unit.

Optionally, the heat dissipation channel includes a heat dissipation channel housing, and the heat dissipation channel housing and the back plate form a heat dissipation chamber;

The heat dissipation chamber includes an air inlet and an air outlet, the air inlet is located on a side close to the bottom plate, the air outlet is located on a side of the air inlet away from the bottom plate, and the air outlet is connected to the Corresponding settings of the battery management unit.

Optionally, the air outlet includes a plurality of sub-air outlets, and the sub-air outlets are provided with fans.

Optionally, the energy storage unit includes a stacked first battery module and a second battery module;

A separator is provided between the first battery module and the second battery module.

Optionally, the first battery module includes a first surface on a side away from the backboard, and the second battery module includes a second surface on a side away from the backboard;

Both the first surface and the second surface are provided with electrode connection terminals and pressure relief valves.

Optionally, the first battery module includes a third surface close to the side of the back plate and opposite to the first surface, and the second battery module includes a third surface close to the side of the back plate and opposite to the first surface. a fourth surface opposite to the second surface;

A thermally conductive material and an insulating spacer surrounding the thermally conductive material are disposed between the third surface and the backplane;

A thermally conductive material and an insulating spacer surrounding the thermally conductive material are disposed between the fourth surface and the back plate.

Optionally, the chassis housing further includes a detachable cover plate, the cover plate is located on a side of the energy storage unit away from the back plate and covers the energy storage unit;

An explosion-proof valve penetrating through the cover plate is arranged on the cover plate.

Optionally, the home energy storage system further includes a heat dissipation substrate of an energy storage unit located between the backplane and the heat dissipation channel;

The heat dissipation substrate of the energy storage unit is arranged correspondingly to the energy storage unit.

Optionally, the home energy storage system further includes a heat dissipation substrate of an inverter unit, and the heat dissipation substrate of the inverter unit is arranged corresponding to the inverter unit.

Optionally, the chassis housing further includes a side support plate, and the side support plate is provided with a user operation unit.

The present invention provides a home energy storage system, the home energy storage system includes: a case housing, the case case includes a bottom plate and a back plate; the home energy storage system also includes energy storage units located inside the case case and sequentially located on one side of the bottom plate , the battery management unit and the inverter unit, and the heat dissipation channel located outside the chassis shell and on the side of the backplane; as for the heat dissipation channel corresponding to the energy storage unit, an auxiliary heat dissipation channel is set outside the chassis shell to cooperate with the energy storage unit and battery management The natural heat dissipation performance of the unit and the inverter unit improves the overall heat dissipation performance of the system and improves the safety of the system.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description Although it is some specific embodiments of the present invention, for those skilled in the art, the basic concepts of device structures, driving methods and manufacturing methods disclosed and suggested by various embodiments of the present invention can be expanded and extended to Undoubtedly, other structures and drawings should fall within the scope of the claims of the present invention.

Fig. 1 is a front view of a household energy storage system provided by an embodiment of the present invention;

Fig. 2 is a left view of a household energy storage system provided by an embodiment of the present invention;

Fig. 3 is a side view of a household energy storage system provided by an embodiment of the present invention;

Fig. 4 is a front view of another household energy storage system provided by an embodiment of the present invention;

Fig. 5 is a partial structural schematic diagram of an energy storage unit provided by an embodiment of the present invention;

Fig. 6 is a partial structural schematic diagram of the first battery module provided by the embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described through implementation with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the embodiment of the present invention. Some, but not all, embodiments. All other embodiments obtained by those skilled in the art based on the basic concepts disclosed and suggested by the embodiments of the present invention belong to the protection scope of the present invention.

Fig. 1 is a front view of a home energy storage system provided by an embodiment of the present invention, and Fig. 2 is a left view of a home energy storage system provided by an embodiment of the present invention, as shown in Fig. 1 and Fig. 2 , the home energy storage system The energy system 100 includes: a chassis shell 101, and the chassis shell 101 includes a bottom plate 1011 and a back plate 1012;

The home energy storage system 100 also includes an energy storage unit 102 , a battery management unit 103 , and an inverter unit 104 located inside the chassis casing 101 and on the side of the bottom plate 1011 in turn, and an heat dissipation channel 105;

The heat dissipation channel 105 is provided corresponding to the energy storage unit 102 .

Among them, the home energy storage system 100 includes a chassis shell 101, the chassis shell 101 includes a bottom plate 1011 and a back plate 1012, the bottom plate 1011 and the back plate 1012 are arranged perpendicular to each other, and the energy storage in the chassis shell 101 and sequentially located on the side of the bottom plate 1011 The unit 102, the battery management unit 103 and the inverter unit 104, the energy storage unit 102, the battery management unit 103 and the inverter unit 104 can be electrically connected by cables to realize signal transmission, the energy storage unit 102 can be a battery pack, The battery pack is composed of multiple cells, which can be charged and discharged. The battery management unit 103 can be a battery management system (Battery Management System, BMS), which is the link between the energy storage unit 102 and the user. In order to improve the utilization rate of the energy storage unit 102 and prevent the energy storage unit 102 from overcharging and over Discharge phenomenon, to prolong the service life of the battery, monitor the purpose of the battery status. The inverter unit 104 is used to convert the received DC current into an AC circuit or the received AC current into a DC current, so that the energy storage unit 102, the battery management unit 103 and the inverter unit 104 all have the ability of natural heat dissipation, Further, by setting the heat dissipation channel 105 outside the chassis shell 101 and on the side of the backplane 1012, the vertical projection of the heat dissipation channel 105 on the backplane 1012 partially overlaps with the vertical projection of the energy storage unit 102 on the backplane 1012, and the heat dissipation channel 105 is set corresponding to the energy storage unit 102. According to the placement positions of the energy storage unit 102, the battery management unit 103 and the inverter unit 104 in the chassis shell 101, the energy storage unit 102, the battery management unit 103 and the inverter unit can be realized. The auxiliary heat dissipation of 104 can effectively improve the overall heat dissipation effect.

In the embodiment of the present invention, through the heat dissipation channel outside the chassis shell and located on the side of the back plate, the heat dissipation channel is set corresponding to the energy storage unit, so as to realize the heat dissipation channel for the home energy storage system composed of the energy storage unit, the battery management unit and the inverter unit. Auxiliary heat dissipation, combined with the self-radiation performance of the energy storage unit, battery management unit and inverter unit, effectively improves the heat dissipation effect and improves the safety of the home energy storage system.

Continuing to refer to Figure 1 and Figure 2, Figure 3 is a side view of a home energy storage system provided by an embodiment of the present invention, as shown in Figure 3, optionally, the heat dissipation channel 105 includes a heat dissipation channel housing 1051, and the heat dissipation channel shell The body 1051 and the back plate 1012 form a heat dissipation chamber;

The heat dissipation chamber includes an air inlet 1052 and an air outlet 1053. The air inlet 1052 is located on the side close to the bottom plate 1011, and the air outlet 1053 is located on the side of the air inlet 1052 away from the bottom plate 1011. The air outlet 1053 is set corresponding to the battery management unit 103.

Wherein, the heat dissipation channel 105 includes a heat dissipation channel housing 1051, and the heat dissipation channel housing 1051 and the back plate 1012 form a heat dissipation chamber; 100% overall heat dissipation. The heat dissipation chamber includes an air inlet 1052 and an air outlet 1053. The air inlet 1052 is located on the side close to the base plate 1011, and the air outlet 1053 is located on the side of the air inlet 1052 away from the base plate 1011. The air outlet 1053 is set corresponding to the battery management unit 103. The vertical projection of the heat dissipation channel housing 1051 on the backplane 1012 partially overlaps the vertical projection of the energy storage unit 102 on the backplane 1012, and the vertical projection of the air inlet 1052 on the backplane 1012 is located at the position of the energy storage unit 102 on the backplane 1012. In the vertical projection above, the air inlet 1052 and the air outlet 1053 are designed so that the energy storage unit 102, the battery management unit 103 and the inverter unit 104 can all be air-cooled and dissipated, improving the heat dissipation capacity of the home energy storage system 100.

Continuing to refer to FIG. 3 , optionally, the air outlet 1053 includes a plurality of sub-air outlets 1054 , and the sub-air outlets 1054 are provided with a fan 1055 .

Wherein, the air outlet includes a plurality of sub-air outlets 1054, and the corresponding sub-air outlets 1054 are provided with fans 1055, and the vertical projection of the fan 1055 on the backplane 1012 overlaps with the vertical projection of the power management unit 103 on the backplane 1012, so that the fan 1055 is rotating During the process, the power management unit 103 can be dissipated. Exemplarily, three fans 1055 are arranged outside the chassis shell 101 and on one side of the backplane 1012 , and the specific number can be selected according to actual design requirements, which is not specifically limited in the embodiment of the present invention. The wind through the air inlet 1052 enters the fan 1055 through the energy storage unit 102 and the heat dissipation chamber, and the fan 1055 rotates to blow the wind to the inverter unit 104, so as to realize the overall auxiliary heat dissipation of the home energy storage system 100 by the heat dissipation channel 105 and improve the home energy storage system. The heat dissipation capability of the energy system 100 as a whole.

Fig. 4 is a front view of another household energy storage system provided by an embodiment of the present invention. As shown in Fig. 4, optionally, the energy storage unit 102 includes a stacked first battery module 1021 and a second battery module group 1022;

A separator 1023 is disposed between the first battery module 1021 and the second battery module 1022 .

Wherein, the energy storage unit 102 may include a first battery module 1021 and a second battery module 1022 stacked in layers; the first battery module 1021 and the second battery module 1022 may be connected in parallel or in series to complete work, and the second A separator 1023 is provided between the first battery module 1021 and the second battery module 1022. For example, when the first battery module 1021 has an expansion failure, due to the existence of the separator 1023, the first battery module 1021 The ejected liquid is blocked by the separator 1023 and will not cause damage to the second battery module 1022 . Similarly, when the second battery module 1022 has an expansion failure, the principle is the same, and will not be repeated here. The partition design between the first battery module 1021 and the second battery module 1022 can effectively reduce the interaction caused by the failure of the first battery module 1021 and the second battery module 1022, and improve the safety of the home energy storage system 100 .

Continuing to refer to FIGS. 1-4 , FIG. 5 is a partial structural schematic diagram of an energy storage unit provided by an embodiment of the present invention. As shown in FIG. 5 , optionally, the first battery module 1021 includes a second A surface 1024, the second battery module 1022 includes a second surface 1025 on a side away from the back plate 1012;

Both the first surface 1024 and the second surface 1025 are provided with an electrode connection terminal 1026 and a pressure relief valve 1027 .

Wherein, the first battery module 1021 and the second battery module 1022 are provided with a plurality of pressure relief valves 1027, an exemplary figure 4 shows a pressure relief valve 1027 on the first surface 1024 and the second surface 1025 A pressure relief valve 1027, the first surface 1024 of the first battery module 1021 away from the back plate 1012 and the second surface 1025 of the second battery module 1022 away from the back plate 1012, the first surface 1024 and the second Both surfaces 1025 are provided with electrode connection terminals 1026 and pressure relief valves 1027. The electrode connection terminals 1026 include a positive connection terminal and a negative connection terminal, which can be connected to the positive and negative electrodes of external electrical components respectively. The pressure relief valve 1027 is used to release the first The internal pressure of the battery module 1021 and the second battery module 1022 can avoid explosion due to excessive air pressure. The first surface 1024 of the first battery module 1021 provided with the electrode connection terminal 1026 and the pressure relief valve 1027 and the second surface 1025 of the second battery module 1022 provided with the electrode connection terminal 1026 and the pressure relief valve 1027 are located at The side away from the back plate 1012, that is, the first battery module 1021 and the second battery module 1022 are placed inside the chassis casing 101 so that the electrode connection terminals 1026 and the pressure relief valve 1027 are facing the cover plate. When the user removes the cover The electrode connection terminal 1026 and the pressure relief valve 1027 can be seen intuitively, which is convenient for users to operate, and the wiring is simple, which reduces the difficulty of assembling the home energy storage system 100 and improves the efficiency of production and assembly. At the same time, the first battery module in the energy storage unit 102 1021 and the second battery module 1022, and the horizontal layout of the first battery module 1021 and the second battery module 1022 can effectively reduce the height of the entire home energy storage system 100, and further reduce the height of the home energy storage system 100. manufacturing cost.

Continuing to refer to FIG. 5 , in which only the first battery module 1021 , the bottom plate 1011 and the back plate 1012 are shown as examples. FIG. 6 is a partial structural diagram of the first battery module provided by the embodiment of the present invention, as shown in As shown in FIG. 6 , optionally, the first battery module 1021 includes a third surface 1028 close to the side of the backplane 1012 and opposite to the first surface 1024 , and the second battery module 1022 includes a third surface 1028 close to the backplane 1012 A fourth surface on the side and opposite to the second surface 1025;

A thermally conductive material 110 and an insulating spacer 111 surrounding the thermally conductive material 110 are disposed between the third surface 1027 and the backplane 1012;

A thermally conductive material 110 and an insulating spacer 111 surrounding the thermally conductive material 110 are disposed between the fourth surface and the back plate 1012 .

Wherein, in FIG. 5, the first battery module 1021 is shown as an example, and the energy storage unit 102 includes the first battery module 1021 and the second battery module 1022. Since the first battery module 1021 and the second battery The module 1022 will generate heat in the working state. In order to ensure a good heat dissipation effect of the energy storage unit 102, the first battery module 1021 includes a third surface 1028 on the side of the back plate 1012 and opposite to the first surface 1024. Between the third surface 1028 and the back plate 1012, a thermally conductive material 110 and an insulating spacer 111 surrounding the thermally conductive material 110 are provided. The second battery module 1022 has the same structure as the first battery module 1021, so the second battery module 1022 On the fourth surface near the backplane 1012 and opposite to the second surface 1025 , a heat-conducting material 110 and an insulating spacer 111 surrounding the heat-conducting material 110 are also disposed between the fourth surface and the backplane 1012 . The heat conduction material 110 is mainly used between the heat source and the heat dissipation element to reduce the thermal resistance of the contact surface and play a good heat conduction role. The heat conduction material 110 can be made of heat conduction silica gel, heat conduction rubber and other materials, and the insulating spacer 111 can be made of plastic, A circular part supported by an insulating material such as resin. The insulating spacer 111 and the heat conduction material 110 are arranged between the backplane 1011 and the energy storage unit 102 to have good insulation and heat conduction effects, ensure sufficient contact to reduce thermal resistance, and improve the heat dissipation efficiency of the home energy storage system 100 .

Continuing to refer to FIG. 1 , optionally, the chassis housing 101 further includes a detachable cover plate 112, the cover plate 112 is located on the side of the energy storage unit 102 away from the back plate 1012 and covers the energy storage unit 102;

The cover plate 112 is provided with an explosion-proof valve 113 penetrating through the cover plate 112 .

The case housing 101 includes a detachable cover plate 112. The cover plate 112 is located on the side of the energy storage unit 102 away from the back plate 1012 and covers the energy storage unit 102. When the energy unit 102 is removed for inspection or maintenance, and the energy storage unit 102 is in a normal working state, the cover plate 112 can be installed on the chassis shell 101 to protect the energy storage unit 102 . Since the energy storage unit 102 is covered by the cover plate, the inside of the case housing 101 is in a sealed environment. When the electric core in the energy storage unit 102 expands, the air pressure inside the case housing 101 rises. In order to prevent the case housing 101 from The interior explodes due to excessive air pressure, and an explosion-proof valve 113 that penetrates the cover plate 112 is provided on the cover plate 112. When the explosion-proof valve 113 senses that the air pressure inside the chassis shell 101 is greater than the preset air pressure threshold, the explosion-proof valve will be opened in time 113 , release the air pressure to ensure the safety performance of the home energy storage system 100 .

Continuing to refer to FIG. 3 , optionally, the home energy storage system 100 further includes a heat dissipation substrate 114 of the energy storage unit located between the backplane 1012 and the heat dissipation channel 105 ;

The heat dissipation substrate 114 of the energy storage unit is arranged corresponding to the energy storage unit 102 .

Wherein, the heat dissipation substrate 114 of the energy storage unit is arranged corresponding to the energy storage unit 102, that is, the vertical projection of the heat dissipation substrate 114 of the energy storage unit on the backplane 1011 overlaps with the vertical projection of the energy storage unit 102 on the backplane 1011, and the heat dissipation substrate 114 of the energy storage unit The backplane 1011 is located on the side away from the energy storage unit 102 , so that the heat generated by the energy storage unit 102 in the working state can be naturally dissipated through the heat dissipation substrate 114 of the energy storage unit. The vertical projection of the heat dissipation substrate 114 of the energy storage unit on the backplane 1012 overlaps the vertical projection of the heat dissipation substrate 114 of the energy storage unit on the backplane 1012, and the air inlet 1052 of the heat dissipation channel 105 is located at the vertical projection of the energy storage unit on the backplane 1012. On the heat dissipation substrate 114 of the unit, the heat dissipation substrate 114 of the energy storage unit is located on the side of the backplane 1012 close to the heat dissipation channel 105, so that the wind entering the heat dissipation chamber through the air inlet 1052 can dissipate heat from the heat dissipation substrate 114 of the energy storage unit and the energy storage unit 102, Improve the heat dissipation effect; the heat dissipation substrate 114 of the energy storage unit is composed of a plurality of heat dissipation fins. The heat dissipation fins are generally made of heat-conducting metals such as aluminum, titanium, and copper. The shape of the heat dissipation fins is generally presented to achieve the heat dissipation effect.

Continuing to refer to FIG. 3 , optionally, the home energy storage system 100 further includes an inverter unit heat dissipation substrate 115 , and the inverter unit heat dissipation substrate 115 is disposed correspondingly to the inverter unit 104 .

Wherein, the heat dissipation substrate 115 of the inverter unit is arranged corresponding to the inverter unit 104, that is, the vertical projection of the heat dissipation substrate 115 of the inverter unit on the backplane 1011 overlaps with the vertical projection of the inverter unit 104 on the backplane 1011, and the heat dissipation substrate 115 of the inverter unit It is located on the side of the backplane 1011 away from the inverter unit 104, so that the heat generated by the inverter unit 104 in the working state can be naturally dissipated through the heat dissipation substrate 115 of the inverter unit. Realize the cooling effect.

Continuing to refer to FIG. 2 , optionally, the case housing 101 further includes a side support plate 116 , and the side support plate 116 is provided with a user operation unit 117 .

Among them, the chassis shell 101 includes a side support plate 116, and the side support plate 116 is provided with a user operation unit 117. The user operation unit 117 is used to facilitate the user to directly control the home energy storage system 100, so as to realize the user's control of the home energy storage system. Ease of operation of the system 100.

Note that the above are only preferred embodiments of the present invention and applied technical principles. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described here, and various obvious changes, readjustments, mutual combinations and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and can also include more other equivalent embodiments without departing from the concept of the present invention, and the present invention The scope is determined by the scope of the appended claims.

Claims

A household energy storage system, characterized in that it comprises: a chassis casing, the chassis casing including a bottom plate and a back plate;

The home energy storage system also includes an energy storage unit, a battery management unit, and an inverter unit located inside the chassis casing and on one side of the bottom plate in turn, and an energy storage unit located outside the chassis casing and on one side of the backplane cooling channels;

The heat dissipation channel is set corresponding to the energy storage unit.
The household energy storage system according to claim 1, wherein the heat dissipation channel comprises a heat dissipation channel shell, and the heat dissipation channel shell and the back plate form a heat dissipation chamber;

The heat dissipation chamber includes an air inlet and an air outlet, the air inlet is located on a side close to the bottom plate, the air outlet is located on a side of the air inlet away from the bottom plate, and the air outlet is connected to the Corresponding settings of the battery management unit.
The household energy storage system according to claim 2, wherein the air outlet includes a plurality of sub-air outlets, and the sub-air outlets are provided with fans.
The household energy storage system according to claim 1, wherein the energy storage unit comprises a stacked first battery module and a second battery module;

A separator is provided between the first battery module and the second battery module.
The home energy storage system according to claim 4, wherein the first battery module includes a first surface away from the backboard, and the second battery module includes a first surface away from the backboard. the second surface of the side;

Both the first surface and the second surface are provided with electrode connection terminals and pressure relief valves.
The home energy storage system according to claim 5, wherein the first battery module includes a third surface close to the side of the backboard and opposite to the first surface, and the second battery The module includes a fourth surface close to the side of the back plate and opposite to the second surface;

A thermally conductive material and an insulating spacer surrounding the thermally conductive material are disposed between the third surface and the backplane;

A thermally conductive material and an insulating spacer surrounding the thermally conductive material are disposed between the fourth surface and the back plate.
The home energy storage system according to claim 4, characterized in that, the chassis housing further includes a detachable cover plate, the cover plate is located on the side of the energy storage unit away from the back plate and covers the the energy storage unit;

An explosion-proof valve penetrating through the cover plate is arranged on the cover plate.
The home energy storage system according to claim 1, wherein the home energy storage system further comprises a heat dissipation substrate of an energy storage unit located between the backplane and the heat dissipation channel;

The heat dissipation substrate of the energy storage unit is arranged correspondingly to the energy storage unit.
The home energy storage system according to claim 1, characterized in that the home energy storage system further comprises a heat dissipation substrate of an inverter unit, and the heat dissipation substrate of the inverter unit is arranged correspondingly to the inverter unit.
The household energy storage system according to claim 1, characterized in that, the case housing further comprises a side support plate, and the side support plate is provided with a user operation unit.