Battery module, thermal control system and electric equipment

Abstract

The invention discloses a battery module, a thermal control system and electric equipment, and belongs to the technical field of batteries, the battery module comprises a shell, the shell is provided with a containing cavity, a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are communicated with the containing cavity; the battery module is arranged in the accommodating cavity, and the battery module comprises a plurality of battery monomers which are arranged along a first direction; the partition plates are arranged on at least one side of the battery monomers in the first direction and attached to the battery monomers, flow channel grooves are formed in the partition plates towards the battery monomers, openings are formed in the two ends of each flow channel groove, and the flow channel grooves communicate with the containing cavity through the openings. Therefore, the immersion liquid enters the accommodating cavity through the liquid inlet and then enters the runner groove through the opening to exchange heat with the battery monomer, so that the temperature of the battery monomer is reduced or increased, finally, the immersion liquid flows out through the liquid outlet, and in the process, the immersion liquid is directly contacted with the battery monomer, so that the heat control efficiency of the battery monomer is improved.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and specifically relates to a battery module, a thermal control system and an electrical device. Background Art

[0002] Immersion thermal control is a commonly used thermal control method for battery modules. By placing battery cells in the battery module in an immersion liquid, heat dissipation or heating of the battery cells is achieved to control the temperature of the battery cells.

[0003] However, the efficiency of current immersion thermal control of battery modules is low. Summary of the invention

[0004] Purpose of the invention: The present application provides a battery module for solving the problem of low efficiency of current immersion thermal control of battery modules; the present application also provides a thermal control system; the present application also provides an electrical device.

[0005] Technical solution: This application provides a battery module, including:

[0006] A housing, the housing having a receiving cavity and a liquid inlet and a liquid outlet communicated with the receiving cavity;

[0007] A battery module is disposed in the accommodating cavity, wherein the battery module includes a plurality of battery cells arranged along a first direction;

[0008] The partition is arranged on at least one side of the battery cell in the first direction and is attached to the battery cell. The partition is provided with a flow channel toward the battery cell. Both ends of the flow channel are provided with openings. The flow channel is connected to the accommodating cavity through the openings.

[0009] In some embodiments, the partition plate is provided with a plurality of the flow channel grooves along the second direction, each of the flow channel grooves is extended along the third direction, and the first direction, the second direction and the third direction intersect with each other.

[0010] In some embodiments, the separators are disposed on both sides of the battery cell along the first direction, and the flow channels of the separators on both sides are arranged alternately along the second direction.

[0011] In some embodiments, the separators are disposed on both sides of the battery cell along the first direction, and the flow channels of the separators on both sides are correspondingly disposed in the second direction.

[0012] In some embodiments, along the first direction, the flow channel grooves are opened on both sides of the partition, and a plurality of the flow channel grooves are arranged at intervals along the second direction.

[0013] In some embodiments, the separator comprises:

[0014] A first plate body, wherein the flow channel groove is formed on at least one side of the first plate body in the first direction;

[0015] A plurality of second plates are arranged along a third direction on both sides of the first plate and are in contact with the surface of the battery cell. The second plate is provided with the opening, which is communicated with the flow channel.

[0016] In some embodiments, the battery cell comprises:

[0017] A cover plate assembly, the cover plate assembly comprising a cover plate body, an electrode and an insulating member; the electrode is arranged on one side of the cover plate body, and the insulating member is arranged on a side of the electrode away from the cover plate body;

[0018] A top cover patch is arranged on a side of the cover body facing the insulating member, the top cover patch is provided with a through hole, and the electrode is passed through the through hole;

[0019] A first protection portion is disposed between the top cover patch and the insulating member.

[0020] In some embodiments, the battery module further comprises:

[0021] The second protection part is arranged in an area on the shell for placing the battery module, and is arranged between the shell and the battery module.

[0022] In some embodiments, the battery module further comprises:

[0023] A detection unit is arranged in the accommodating cavity near the liquid outlet, and the detection unit is connected in parallel with the voltage sampling circuit of the battery module.

[0024] In some embodiments, the housing and the partition are made of insulating materials.

[0025] Accordingly, the present application also provides a thermal control system, comprising:

[0026] An internal circulation subsystem, the internal circulation subsystem comprising a heat exchange module, a conveying module and a plurality of battery modules as described in any one of the above embodiments connected in sequence; the heat exchange module is also connected to the external circulation subsystem, and is used for the internal circulation subsystem to exchange heat with the external circulation subsystem; the conveying module is used for circulating and conveying the immersion liquid between the heat exchange module and the plurality of battery modules;

[0027] A control module, the control module includes a first control unit and multiple second control units; the first control unit is connected to the conveying module and is used to control the start and stop of the conveying module; the second control unit is connected to the battery module and is used to control the flow rate of the immersion liquid input into each of the battery modules.

[0028] In some embodiments, the immersion liquid is deionized water or purified water.

[0029] In some embodiments, the delivery module comprises:

[0030] An infusion pump and a liquid storage tank are connected to each other, wherein the liquid storage tank is provided with a heater and an exhaust valve, and a heat preservation layer is provided on the surface of the liquid storage tank.

[0031] Correspondingly, the present application also provides an electrical device, including the thermal control system as described in the above embodiment.

[0032] Beneficial effect: Compared with the prior art, a battery module provided in an embodiment of the present application includes: a shell having a receiving cavity and a liquid inlet and a liquid outlet connected to the receiving cavity; a battery module arranged in the receiving cavity, and the battery module includes a plurality of battery cells arranged along a first direction; a partition, arranged on at least one side of the battery cell in the first direction and fitted with the battery cell, the partition is provided with a flow channel facing the battery cell, and openings are provided at both ends of the flow channel, and the flow channel is connected to the receiving cavity through the opening. In this way, the immersion liquid enters the receiving cavity through the liquid inlet, and then enters the flow channel through the opening to perform heat exchange with the battery cell, thereby realizing cooling or heating of the battery cell. Finally, the immersion liquid flows out through the liquid outlet. In this process, the immersion liquid directly contacts the battery cell, thereby improving the thermal control efficiency of the battery cell.

[0033] It can be understood that, compared with the prior art, the thermal control system provided in the embodiment of the present application includes all the technical features and technical effects of the above-mentioned battery module, which will not be repeated here.

[0034] It can be understood that, compared with the prior art, the electrical equipment provided in the embodiment of the present application includes all the technical features and technical effects of the above-mentioned thermal control system, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0036] Figure 1 A first structural schematic diagram of a battery module provided in an embodiment of the present application;

[0037] Figure 2A second structural schematic diagram of a battery module provided in an embodiment of the present application;

[0038] Figure 3 A schematic diagram of the structure of a shell in a battery module provided in an embodiment of the present application;

[0039] Figure 4 A schematic diagram of the structure of a battery module in a battery module provided in an embodiment of the present application;

[0040] Figure 5 for Figure 4 Schematic diagram of the cross section of AA;

[0041] Figure 6 for Figure 5 A magnified schematic diagram of the middle B area;

[0042] Figure 7 A first structural schematic diagram of a separator in a battery module provided in an embodiment of the present application;

[0043] Figure 8 A second structural schematic diagram of a separator in a battery module provided in an embodiment of the present application;

[0044] Fig. 9 A third structural schematic diagram of a separator in a battery module provided in an embodiment of the present application;

[0045] Fig.10 A schematic diagram of the structure of a battery cell in a battery module provided in an embodiment of the present application;

[0046] Fig.11 for Fig.10 Enlarged schematic diagram of the middle C area;

[0047] Fig.12 A schematic diagram of the structure of a thermal control system provided in an embodiment of the present application.

[0048] Figure numerals: 10-battery module; 110-shell; 111-accommodating chamber; 112-liquid inlet; 113-liquid outlet; 120-battery module; 130-battery cell; 131-insulating member; 132-top cover patch; 133-first protective part; 140-partition; 141-flow channel; 142-opening; 143-first plate; 144-second plate; 150-second protective part; 160-detection unit; 170-end plate; 180-connecting row; 190-binding strap; 20-internal circulation subsystem; 21-heat exchange module; 22-transport module; 221-infusion pump; 222-liquid storage tank; 2221-insulation layer; 30-control module; 31-first control unit; 32-second control unit; 40-external circulation subsystem; Y-first direction; Z-second direction; X-third direction. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only 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 those skilled in the art without creative work are within the scope of protection of the present application.

[0050] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "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, an electrical connection, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features.

[0051] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application.

[0052] The present application embodiment provides a battery module. Figures 1 to 7 , Figure 1 A first structural schematic diagram of a battery module provided in an embodiment of the present application is illustrated; Figure 2 A second structural schematic diagram of a battery module provided in an embodiment of the present application is illustrated; Figure 3 A schematic diagram of the structure of a housing in a battery module provided in an embodiment of the present application is illustrated; Figure 4 A schematic diagram of the structure of a battery module in a battery module provided in an embodiment of the present application is illustrated; Figure 5 Indicated Figure 4 Schematic diagram of the cross section of AA; Figure 6 Indicated Figure 5 A magnified schematic diagram of the middle B area; Figure 7The first structural schematic diagram of the partition in the battery module provided in the embodiment of the present application is illustrated. The battery module 10 provided in the embodiment of the present application includes: a shell 110, a battery module 120 and a partition 140. Among them, the shell 110 has a accommodating cavity 111 and a liquid inlet 112 and a liquid outlet 113 connected to the accommodating cavity 111; the battery module 120 is arranged in the accommodating cavity 111, and the battery module 120 includes a plurality of battery cells 130 arranged along the first direction Y; the partition 140 is arranged on at least one side of the battery cell 130 in the first direction Y, and is attached to the battery cell 130, and the partition 140 is provided with a flow channel 141 toward the battery cell 130, and openings 142 are provided at both ends of the flow channel 141, and the flow channel 141 is connected to the accommodating cavity 111 through the opening 142. It can be understood that there can be multiple battery modules 120, and each battery module 120 includes multiple battery cells 130. In this way, the present application sets a partition 140 and a flow channel 141 in the battery module so that the immersion liquid can directly contact the battery cell 130 to achieve heat exchange with the battery cell 130, thereby effectively reducing or increasing the temperature of the battery cell 130 and improving the thermal control efficiency of the battery module 10. Specifically, in the battery module 10 of the present application, the immersion liquid enters the accommodating cavity 111 through the liquid inlet 112, and then enters the flow channel 141 through the opening 142 to perform heat exchange with the battery cell 130, thereby achieving cooling or heating of the battery cell 130. Finally, the immersion liquid flows out through the liquid outlet 113 to achieve the circulation of the immersion liquid in the battery module. In this process, the immersion liquid is in direct contact with the battery cell 130, and the temperature of the immersion liquid can be controlled to adjust the operating temperature of the battery cell 130 as needed, thereby improving the thermal control efficiency of the battery cell 130. In addition, the separator 140 of the present application is attached to the battery cells 130 , and can isolate and support the battery cells 130 , thereby providing additional protection for the battery cells 130 .

[0053] It should be noted that the immersion liquid of the present application can be selected as deionized water or purified water, collectively referred to as aqueous immersion liquid. Compared with organic immersion liquid, aqueous immersion liquid has high thermal conductivity and no viscosity, and its heat transfer performance is significantly higher. It can effectively absorb and transfer heat, thereby providing a higher heat exchange efficiency for the thermal control of the battery cell 130 and reducing the energy consumption of thermal management of the battery cell 130. Secondly, the aqueous immersion liquid is flame retardant, that is, the aqueous immersion liquid is non-flammable. Compared with the flammable organic immersion liquid, the aqueous immersion liquid itself can be used to extinguish fires without the need for additional fire-fighting facilities. In addition, compared with organic immersion liquid, aqueous immersion liquid is easier to obtain, has lower cost, and is more convenient to use. Even if it leaks, it will not pollute the environment, further improving the environmental protection properties of the battery module 10.

[0054] Please refer again Figure 2 and Figure 6In some embodiments, the partition 140 is provided with a plurality of flow channels 141 along the second direction Z, each flow channel 141 is extended along the third direction X, and the first direction Y, the second direction Z and the third direction X intersect each other. It can be understood that, by providing a plurality of flow channels 141 on the partition 140, the present application enables each surface of the battery cell 130 on both sides along the first direction Y to contact the immersion liquid in the plurality of flow channels 141, further increasing the path for heat exchange between the battery cell 130 and the immersion liquid, improving the heat exchange rate between the battery cell 130 and the immersion liquid, and thus maintaining the temperature of the battery cell 130 within a suitable range.

[0055] Please refer again Figure 2 , Figure 5 and Figure 6 In some embodiments, along the first direction Y, a separator 140 is disposed on both sides of the battery cell 130, and the flow channels 141 of the separators 140 on both sides are arranged in a staggered manner along the second direction Z; wherein, the staggered arrangement means that the flow channels 141 on both sides of the battery cell 130 are arranged in an alternating manner along the second direction Z, or in other words, for any side of the two side surfaces of the battery cell 130 along the first direction Y, the orthographic projections of the flow channels 141 on both sides of the battery cell 130 on the side surface are arranged in an alternating manner. Specifically, Figure 6 For example, for the battery cell 130 in the figure, from bottom to top, after arranging a flow channel 141 on the left side, another flow channel 141 is arranged at the upper right side, and then a flow channel 141 is arranged on the left side, and so on, until the arrangement is completed, so as to achieve alternating heat exchange on both sides of the battery cell 130. It can be understood that the orthographic projection of the flow channel 141 on both sides of the battery cell 130 can be as follows Figure 6The illustrated embodiment is completely non-overlapping, and may also partially overlap to completely cover the side surface, further enhancing the contact area between the battery cell 130 and the immersion liquid. In this way, the present application provides a partition 140 on each side of the battery cell 130, and the immersion liquid flowing through the flow channel 141 on each partition 140 can contact the battery cell 130, thereby increasing the surface area of ​​the battery cell 130 for heat exchange with the immersion liquid, so that the heat in the battery cell 130 is more evenly and quickly transferred to the immersion liquid, or the heat in the immersion liquid is more evenly and quickly transferred to the battery cell 130, thereby improving the heat exchange efficiency between the battery cell 130 and the immersion liquid, and reducing the thermal management energy consumption of the battery module 10. Furthermore, the first direction Y is the thickness direction of the battery cell 130. At this time, a partition 140 is provided on each side of the large surface of the battery cell 130, and the battery cell 130 exchanges heat with the immersion liquid through the large surface with a larger area, further improving the heat exchange efficiency between the battery cell 130 and the immersion liquid. The flow channels 141 of the partitions 140 on both sides are staggered along the second direction Z, so that the two side surfaces of the battery cells 130 along the first direction Y can contact the immersion liquid at different positions along the second direction Z, further increasing the contact area between the battery cells 130 and the immersion liquid, and improving the heat exchange efficiency between the battery cells 130 and the immersion liquid.

[0056] Please refer again Figure 2 In some embodiments, along the first direction Y, a separator 140 is provided on both sides of the battery cell 130, and the flow channels 141 of the separators 140 on both sides are correspondingly arranged in the second direction Z. During the heat exchange process of the battery cell 130, heat exchange will occur on the surfaces on both sides along the first direction Y. Therefore, in the present application, the flow channels 141 of the two separators 140 are correspondingly arranged in the second direction Z, that is, the orthographic projections of the flow channels 141 on both sides of the battery cell 130 along the first direction Y on the battery cell 130 have overlapping parts, ensuring that any part of the battery cell 130 along the second direction Z can dissipate heat through at least one side of the surface. In this way, the present application increases the contact area of ​​the battery cell 130 for heat exchange with the immersion liquid by making the orthographic projections of the flow channels 141 of the two separators 140 on the battery cell 130 at least partially overlap, so that heat is transferred more evenly between the battery cell 130 and the immersion liquid, reducing the temperature non-uniformity of the battery cell 130, and improving the heat exchange efficiency, thereby effectively controlling the temperature of the battery cell 130.

[0057] See also Fig. 9 , Fig. 9The third structural schematic diagram of the partition in the battery module provided in the embodiment of the present application is illustrated; in some embodiments, along the first direction Y, flow channels 141 are provided on both sides of the partition 140, and multiple flow channels 141 are arranged at intervals along the second direction Z. In the embodiment of the present application, flow channels 141 can also be provided on both sides of the partition 140, so that both sides of the same partition 140 can guide the immersion liquid at the same time, and only one partition 140 is provided between two adjacent battery cells 130 to achieve simultaneous heating or cooling of the two battery cells 130. In addition, this arrangement reduces the thickness of the partition 140 provided between two adjacent battery cells 130, further saves space in the accommodating cavity 111, and improves the space utilization of the battery module 10.

[0058] In some embodiments, the partition 140 includes a first plate 143 and a plurality of second plates 144; wherein the first plate 143 is provided with a flow channel 141 on at least one side in the first direction Y; the plurality of second plates 144 are relatively arranged on both sides of the first plate 143 along the third direction X, and are in contact with the surface of the battery cell 130; the second plate 144 is provided with an opening 142, and the opening 142 is connected with the flow channel 141. In this way, the immersion liquid flows into the flow channel 141 from the opening 142, and then releases and heat exchanges with the battery cell 130. At the same time, the first plate 143 and the second plate 144 are in contact with the surface of the battery cell 130, and the battery cell 130 is limited, supported and fixed, thereby enhancing the stability of the battery cell 130 and the partition 140, and avoiding the influence of vibration on the temperature control of the battery cell 130 during transportation or use of the battery module 10.

[0059] It is understandable that if Figure 7 and Figure 8 As shown, Figure 8 The second structural schematic diagram of the separator in the battery module provided by the embodiment of the present application is illustrated. When the separator 140 is arranged at the outermost side of the plurality of battery cells 130, the second plate 144 can only extend to the side of the first plate 143 facing the battery cell 130, so as to achieve the above-mentioned effect while reducing the thickness of the separator 140 as much as possible and improving the space utilization rate of the accommodating cavity 111. Similarly, if Fig. 9 As shown, when the partition 140 is arranged between two adjacent battery cells 130, the second plate 144 can simultaneously extend on both sides of the first plate 143 along the first direction Y to limit, support and fix the battery cells 130 on both sides, further enhancing the stability of the battery cells 130 and the partition 140.

[0060] See also Fig.10 and Fig.11 , Fig.10A schematic diagram of the structure of a battery cell in a battery module provided in an embodiment of the present application is illustrated; Fig.11 Indicated Fig.10 An enlarged schematic diagram of the middle C area; in some embodiments, the battery cell 130 includes: a cover plate assembly (not shown in the figure), a top cover patch 132 and a first protective part 133; wherein the cover plate assembly includes a cover plate body, an electrode and an insulating member 131; the electrode is arranged on one side of the cover plate body, and the insulating member 131 is arranged on the side of the electrode away from the cover plate body; the top cover patch 132 is arranged on the side of the cover plate body facing the insulating member 131, and the top cover patch 132 is provided with a through hole, and the electrode is passed through the through hole; the first protective part 133 is arranged between the top cover patch 132 and the insulating member 131. For the battery cell 130, the cover plate assembly is the main structure for the battery cell 130 to be electrically connected with other structures. The cover plate assembly includes a cover plate body, an electrode and an insulating member 131, wherein the electrode includes a positive electrode and a negative electrode, and the insulating member 131 is arranged on the negative electrode, which is usually a negative electrode upper plastic arranged between the negative electrode riveting block and the top cover of the battery cell 130. In this structure, there is a conductive gap between the top cover patch 132 and the insulating member 131, so it is necessary to set a first protective portion 133 in the gap to insulate and waterproof the gap between the top cover patch 132 and the insulating member 131 to prevent the battery cell 130 from contacting the immersion liquid and causing a short circuit. The first protective portion 133 can be an insulating and waterproof structure such as waterproof glue.

[0061] Understandably, please refer again Figure 2 Since the battery cells 130 are usually electrically connected using connecting bars 180, the highest position of the immersion liquid in the present application can be lower than the top surface of the battery cell 130 to ensure the safety of the battery module 10; or after the non-welding area of ​​the connecting bar 180 is further insulated by dipping or spraying, the highest position of the immersion liquid completely immerses the connecting bar 180 to increase the contact area between the battery cell 130 and the immersion liquid and improve the heat exchange efficiency.

[0062] Also, please refer again to Figure 2 , the present application also sets end plates 170 at the outermost sides of both ends of the battery module 120, and an end plate 170 can be set at each end, and the end plate 170 and multiple battery cells 130 are bound and fixed by a band 190. In this way, the end plate 170, the partition 140 and the band 190 combine multiple battery cells 130 into a whole, so as to withstand the expansion force of the battery cell 130 during its life cycle and avoid deformation of the surface of the battery cell 130 along the first direction Y. It can be understood that in order to enhance the stability of the battery module 120, the band 190 can be made of stainless steel, and in order to enhance the insulation effect, an insulating sleeve is added to the part where the band 190 is close to the surface of the battery cell 130.

[0063] Please refer again Figure 3 In some embodiments, the battery module 10 further includes: a second protective portion 150, which is disposed in an area on the shell 110 for placing the battery module 120, and is disposed between the shell 110 and the battery module 120. In this way, the second protective portion 150 serves as a barrier between the shell 110 and the battery module 120 to prevent a short circuit between the shell 110 and the battery module 120. For example, after multiple battery modules 10 are connected in series, for 52 strings or less of battery modules 10, the voltage stress inside all battery modules 10 can be reduced from about 1500V to about 200V, that is, there will be no voltage exceeding 200V inside the battery module 10. The shell 110 is bonded to the bottom surface of the battery cell 130 with a structural adhesive to prevent creepage between the bottom surfaces of the battery cells 130 when the bottom coating of the battery cells 130 is poor and the insulation of the immersion liquid is abnormal. It is understandable that, for a large battery module 10 , plastic or metal reinforcement ribs may be provided on the outside of the bottom surface of the housing 110 to enhance the structural strength of the battery module 10 and improve the safety of the battery module 10 .

[0064] Please refer again Figure 3 In some embodiments, the battery module 10 further includes: a detection unit 160, which is disposed in the accommodating chamber 111 near the liquid outlet 113, and the detection unit 160 is connected in parallel with the voltage sampling circuit of the battery module 120. In the embodiment of the present application, the detection unit 160 is used to monitor in real time whether the immersion liquid is normal. Specifically, the detection unit 160 is disposed in the accommodating chamber 111 near the liquid outlet 113, and its two poles are connected in parallel to the voltage sampling circuit of the battery module 120. When the immersion liquid in the accommodating chamber 111 is normal deionized water or pure water, the detection unit 160 is equivalent to a capacitor and has no effect on the voltage sampling; when the immersion liquid is contaminated and the conductivity increases, obvious leakage current is generated between the plates, the voltage sampling is abnormal, and the detection unit 160 performs subsequent emergency processing actions. For example, when the voltage sampling is slightly abnormal, the detection unit 160 issues an alarm message, and the second control unit 32 shuts off the immersion liquid supply of the current battery module 10; when the voltage sampling is seriously abnormal, the detection unit 160 issues an alarm message, and the second control unit 32 shuts off the immersion liquid supply of the normal battery module 10, and at the same time increases the immersion liquid supply of the abnormal battery module 10, thereby realizing water fire fighting of the battery module 10.

[0065] In some embodiments, the housing 110 and the partition 140 are insulating materials. In this way, the housing 110 and the partition 140 using insulating materials can effectively isolate the electrical connection between the battery cells 130 and between the battery cells 130 and the external environment, avoid short circuits between the battery module 120 and external metal structures or other conductive objects, reduce electrical safety risks such as electric shock and fire, and prevent the current of the battery module 120 from escaping, reducing energy loss and safety hazards caused by leakage. Secondly, the insulating material has low thermal conductivity and vibration conductivity, which can effectively isolate the heat and vibration between the housing 110 and the partition 140, thereby maintaining the temperature of the battery module 120 stable, and reducing the impact of vibration on the battery module 120, improving the performance and life of the battery module 10. In addition, the insulating material generally has good corrosion resistance, which can effectively prevent the chemical substances inside the battery module 120 from contacting with humidity, gas or other corrosive substances in the external environment, thereby protecting the structural integrity and long-term stability of the battery module 120.

[0066] In summary, the present application sets a partition 140 and a flow channel 141 in the battery module 120 so that the immersion liquid can directly contact the battery cell 130 to achieve heat exchange with the battery cell 130, thereby effectively reducing or increasing the temperature of the battery cell 130 and improving the thermal control efficiency of the battery module 10. Specifically, in the battery module 10 of the present application, the immersion liquid enters the accommodating cavity 111 through the liquid inlet 112, and then enters the flow channel 141 through the opening 142 to perform heat exchange with the battery cell 130, thereby achieving cooling or heating of the battery cell 130. Finally, the immersion liquid flows out through the liquid outlet 113 to achieve the circulation of the immersion liquid in the battery module. In this process, the immersion liquid is in direct contact with the battery cell 130, and the temperature of the immersion liquid can be controlled to adjust the operating temperature of the battery cell 130 as needed, thereby improving the thermal control efficiency of the battery cell 130. In addition, the separator 140 of the present application is attached to the battery cells 130 , and can isolate and support the battery cells 130 , thereby providing additional protection for the battery cells 130 .

[0067] Accordingly, see Fig.12 , Fig.12The schematic diagram of the structure of the thermal control system provided by the embodiment of the present application is illustrated. The present application also provides a thermal control system, including: an internal circulation subsystem 20, a control module 30 and an external circulation subsystem 40. Among them, the internal circulation subsystem 20 includes a heat exchange module 21, a conveying module 22 and a plurality of battery modules 10 as any one of the above embodiments connected in sequence; the heat exchange module 21 is also connected to the external circulation subsystem 40, for the internal circulation subsystem 20 and the external circulation subsystem 40 to perform heat exchange, and the heat exchange module 21 is used to perform heat exchange with the external circulation subsystem 40; the conveying module 22 is used to circulate the immersion liquid between the heat exchange module 21 and the plurality of battery modules 10; the control module 30 includes a first control unit 31 and a plurality of second control units 32; the first control unit 31 is connected to the conveying module 22, for controlling the start and stop of the conveying module 22; the second control unit 32 is connected to the battery module 10, for controlling the flow rate of the immersion liquid input into each battery module 10. The present application controls the circulation and flow of the immersion liquid through the control module 30, which can prevent excessive or insufficient immersion liquid from entering the battery module 10, thereby protecting the battery module 10 from overheating or overcooling, thereby improving the safety of the battery module 10 and reducing potential safety risks.

[0068] Specifically, the thermal control system includes two cycles, the external circulation subsystem 40 is for primary side cooling / heating, and the internal circulation subsystem 20 performs heat exchange with the external circulation subsystem 40. Among them, the conveying module 22 in the internal circulation subsystem 20 is responsible for circulating the immersion liquid between the heat exchange module 21 and the multiple battery modules 10, realizing the circulation and heat exchange of the immersion liquid between the heat exchange module 21 and the multiple battery modules 10, and improving the temperature stability of the multiple battery modules 10. Secondly, the first control unit 31 is connected to the conveying module 22 to control the start and stop of the conveying module 22, so as to accurately control the circulation flow of the immersion liquid. The second control unit 32 is connected to the battery module 10 to control the flow rate of the immersion liquid input into each battery module 10, so as to accurately adjust the thermal control of each battery module 10 according to actual needs, and improve the flexibility and efficiency of temperature control. The second control unit 32 may be a solenoid valve, so that the immersion liquid flowing through each battery module 10 may be controlled by a second control unit 32 alone to prevent the immersion liquid from being contaminated and spreading to the remaining battery modules 10 , and to control the immersion liquid to perform water extinguishing on a single battery module 10 after thermal runaway occurs in the battery module 10 .

[0069] In some embodiments, the immersion liquid is deionized water or purified water. It should be noted that the immersion liquid of the present application may be selected from deionized water or purified water, collectively referred to as aqueous immersion liquid. Compared with organic immersion liquid, aqueous immersion liquid has high thermal conductivity and no viscosity, and its heat transfer performance is significantly higher. It can effectively absorb and transfer heat, thereby providing a higher heat exchange efficiency for the thermal control of the battery cell 130 and reducing the energy consumption of thermal management of the battery cell 130. Secondly, the aqueous immersion liquid is flame retardant, that is, the aqueous immersion liquid is non-flammable. Compared with the flammable organic immersion liquid, the aqueous immersion liquid itself can be used to extinguish fires without the need for additional fire-fighting facilities. In addition, compared with organic immersion liquid, aqueous immersion liquid is easier to obtain, has lower cost, and is more convenient to use. Even if it leaks, it will not pollute the environment, further improving the environmental protection properties of the battery module 10.

[0070] In some embodiments, the delivery module 22 includes: an infusion pump 221 and a liquid storage tank 222 connected in sequence, the liquid storage tank 222 is provided with a heater and an exhaust valve, and the surface of the liquid storage tank 222 is provided with an insulation layer 2221. Specifically, the infusion pump 221 is used to accurately deliver the immersion liquid from the liquid storage tank 222 to between the heat exchange module 21 and the plurality of battery modules 10, and the working state and flow rate of the infusion pump 221 are controlled by the first control unit 31 to achieve accurate delivery of the immersion liquid, ensure that each battery module 10 can obtain an appropriate amount of immersion liquid, and improve the stability and performance of the battery module 10. The heater of the liquid storage tank 222 can provide heat, and the exhaust valve can control the gas discharge in the liquid storage tank 222 to achieve temperature control of the immersion liquid in the liquid storage tank 222, ensure that the temperature of the immersion liquid is within an appropriate range, and improve the working efficiency and life of the battery module 10; at the same time, the exhaust valve can prevent gas accumulation from causing pressure increase, thereby maintaining the normal working state of the liquid storage tank and reducing potential safety risks. In addition, a thermal insulation layer 2221 is provided on the surface of the liquid storage tank 222 to block the heat conduction from the external environment to the liquid storage tank 222, maintain the temperature of the immersion liquid stable, reduce the heat loss of the immersion liquid, and improve the energy efficiency and stability of the thermal control system.

[0071] It can be understood that, compared with the prior art, the battery pack discharge control device provided in the embodiment of the present application includes all the technical features and technical effects of the above-mentioned thermal control system, which will not be repeated here.

[0072] Correspondingly, the present application also provides an electrical device, including a thermal control system as in any one of the above embodiments.

[0073] In the embodiments of the present application, the electrical equipment may be a mobile phone, a portable device, a laptop computer, an electric toy, an electric tool, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc.; electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical equipment.

[0074] It can be understood that, compared with the prior art, the electrical equipment provided in the embodiment of the present application includes all the technical features and technical effects of the above-mentioned thermal control system, which will not be repeated here.

[0075] Accordingly, the present application also provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and the computer program is used to enable a processor to implement the steps of the thermal control system as described in any one of the above embodiments when executed.

[0076] It can be understood that, compared with the prior art, the computer-readable storage medium provided in the embodiment of the present application includes all the technical features and technical effects of the above-mentioned thermal control system, which will not be repeated here.

[0077] The above is a detailed introduction to a battery module, a thermal control system and an electrical equipment provided in the embodiments of the present application. Specific examples are used in the present application to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some 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 module, characterized in that: include: A housing (110), the housing (110) comprising a containing cavity (111) and a liquid inlet (112) and a liquid outlet (113) communicated with the containing cavity (111); A battery module (120) is arranged in the accommodating cavity (111), wherein the battery module (120) comprises a plurality of battery cells (130) arranged along a first direction (Y); A partition (140) is arranged on at least one side of the battery cell (130) in the first direction (Y) and is in contact with the battery cell (130); the partition (140) is provided with a flow channel (141) facing the battery cell (130); openings (142) are provided at both ends of the flow channel (141); and the flow channel (141) is connected to the accommodating cavity (111) through the openings (142).

2. The battery module according to claim 1, characterized in that: The partition plate (140) is provided with a plurality of flow channel grooves (141) along the second direction (Z), each of the flow channel grooves (141) is extended along the third direction (X), and the first direction (Y), the second direction (Z) and the third direction (X) intersect with each other.

3. The battery module according to claim 1 or 2, characterized in that: Along the first direction (Y), the separators (140) are arranged on both sides of the battery cell (130), and the flow channel grooves (141) of the separators (140) on both sides are arranged in a staggered manner along the second direction (Z).

4. The battery module according to claim 1 or 2, characterized in that: Along the first direction (Y), the separators (140) are arranged on both sides of the battery cell (130), and the flow channel grooves (141) of the separators (140) on both sides are arranged correspondingly in the second direction (Z).

5. The battery module according to claim 1, characterized in that: Along the first direction (Y), the flow channel grooves (141) are provided on both sides of the partition plate (140), and a plurality of the flow channel grooves (141) are arranged at intervals along the second direction (Z).

6. The battery module according to claim 1, characterized in that: The partition (140) comprises: A first plate body (143), wherein the flow channel groove (141) is provided on at least one side of the first plate body (143) in the first direction (Y); A plurality of second plates (144) are arranged along a third direction (X) on both sides of the first plate (143) and are bonded to the surface of the battery cell (130); the second plate (144) is provided with the opening (142), and the opening (142) is connected to the flow channel (141).

7. The battery module according to claim 1, characterized in that: The battery cell (130) comprises: A cover plate assembly, the cover plate assembly comprising a cover plate body, an electrode and an insulating member (131); the electrode is arranged on one side of the cover plate body, and the insulating member (131) is arranged on a side of the electrode away from the cover plate body; A top cover patch (132) is arranged on a side of the cover plate body facing the insulating member (131), the top cover patch (132) is provided with a through hole, and the electrode is passed through the through hole; A first protection portion (133), wherein the first protection portion (133) is arranged between the top cover patch (132) and the insulating member (131).

8. The battery module according to claim 1, characterized in that: Also includes: The second protection portion (150) is arranged in an area on the shell (110) for placing the battery module (120), and is arranged between the shell (110) and the battery module (120).

9. The battery module according to claim 1, characterized in that: The battery module further comprises: A detection unit (160) is arranged in the accommodating cavity (111) near the liquid outlet (113), and the detection unit (160) is connected in parallel with the voltage sampling circuit of the battery module (120).

10. The battery module according to claim 1, characterized in that: The shell (110) and the partition (140) are made of insulating materials.

11. A thermal control system, characterized in that: include: An internal circulation subsystem (20), the internal circulation subsystem (20) comprising a heat exchange module (21), a conveying module (22) and a plurality of battery modules according to any one of claims 1 to 10, which are connected in sequence; the heat exchange module (21) is also connected to an external circulation subsystem (40) for performing heat exchange between the internal circulation subsystem (20) and the external circulation subsystem (40); the conveying module (22) is used for circulating and conveying immersion liquid between the heat exchange module (21) and the plurality of battery modules; A control module (30), the control module (30) comprising a first control unit (31) and a plurality of second control units (32); the first control unit (31) is connected to the delivery module (22) and is used to control the start and stop of the delivery module (22); the second control unit (32) is connected to the battery module and is used to control the flow rate of the immersion liquid input into each of the battery modules.

12. The thermal control system according to claim 11, characterized in that: The immersion liquid is deionized water or purified water.

13. The thermal control system according to claim 11, characterized in that: The conveying module (22) comprises: An infusion pump (221) and a liquid storage tank (222) are connected to each other, the liquid storage tank (222) is provided with a heater and an exhaust valve, and the surface of the liquid storage tank (222) is provided with a heat-insulating layer (2221).

14. An electrical device, characterized in that: Comprising a thermal control system as claimed in any one of claims 11 to 13.

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