Battery apparatus and method of use

Abstract

The application discloses a battery device and a use method, comprising a shell, a plurality of single batteries, a temperature regulating system and a bubbling system, the plurality of single batteries are arranged in the shell, and the shell stores a first medium, the first medium immerses at least part of each single battery; the temperature regulating system comprises a heat exchange plate arranged in the shell, the heat exchange plate is attached to at least part of the single battery to realize heat exchange between the second medium and the single battery when the second medium is input into the temperature regulating system; the bubbling system is used for inputting gas into the first medium to blow the first medium into foam covering each surface of each single battery when the temperature regulating system regulates the temperature of the single battery. The battery device of the application can improve the temperature control effect, avoid the uneven temperature regulation, and further avoid the problems of interface abnormality, cycle life damage and the like caused by uneven battery current distribution, so that the good operation of the battery device is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery device and a use method. BACKGROUND

[0002] In recent years, with the rise of new energy vehicles, the power battery industry has also developed rapidly. In actual use, power batteries need to be operated in a reasonable temperature range, so power batteries usually need to be assisted by temperature regulating systems such as air cooling and liquid cooling to realize temperature regulation. However, due to factors such as temperature regulating mode and temperature regulating process, the power batteries in the related art still have poor temperature control effect, uneven temperature regulation, and other problems, which further cause uneven distribution of battery current, interface abnormalities, and reduced cycle life. SUMMARY

[0003] The present application aims to at least partially solve one of the technical problems in the related art.

[0004] To this end, the present application provides a battery device that can improve the temperature control effect, avoid uneven temperature regulation, and thus avoid problems such as uneven distribution of battery current, interface abnormalities, and reduced cycle life, thereby ensuring good operation of the battery device.

[0005] The present application also provides a use method of the battery device.

[0006] The battery device of the present application comprises:

[0007] a housing and a plurality of single batteries, the plurality of single batteries are arranged in the housing, and the housing stores a first medium, the first medium immerses at least part of each single battery;

[0008] a temperature regulating system, the temperature regulating system comprises a heat exchange plate arranged in the housing, the heat exchange plate is attached to at least part of the single batteries to realize heat exchange between the second medium and the single batteries when the temperature regulating system is supplied with the second medium;

[0009] a bubbling system, the bubbling system is used to supply gas to the first medium to blow the first medium into foam covering each surface of the single battery when the temperature regulating system regulates the temperature of the single battery.

[0010] In some embodiments, a temperature regulating device is included, the temperature regulating device is arranged in the bubbling system, and the temperature regulating device is used to adjust the temperature of the gas to make the temperature of the gas flowing to the first medium equivalent to the temperature of the second medium flowing to the heat exchange plate.

[0011] In some embodiments, the temperature regulating device is a heat exchanger, the heat exchanger is arranged between the temperature regulating system and the bubbling system, and the heat exchanger is used to exchange heat between the gas and the second medium so that the temperature of the gas and the second medium is equalized.

[0012] In some embodiments, the temperature regulating system comprises:

[0013] a liquid inlet pipe and a liquid outlet pipe, the liquid inlet pipe and the liquid outlet pipe both pass through the shell, the liquid inlet pipe is used to introduce the second medium into the heat exchange plates, the liquid outlet pipe is used to discharge the second medium in the heat exchange plates, and the liquid inlet pipe is connected with the heat exchanger, the heat exchange plates are arranged between the liquid inlet pipe and the liquid outlet pipe.

[0014] In some embodiments, the bubbling system comprises:

[0015] a gas inlet pipe, the gas inlet pipe is connected with the heat exchanger;

[0016] a plurality of gas guide pipes, the plurality of gas guide pipes are arranged in the shell and are all connected with the gas inlet pipe;

[0017] a plurality of bubble generators, the plurality of bubble generators are arranged in the plurality of gas guide pipes, at least part of each bubble generator is immersed in the first medium, and the bubble generator is used to blow the first medium into foam.

[0018] In some embodiments, the plurality of gas guide pipes comprises a plurality of transverse pipes and a plurality of longitudinal pipes, the plurality of transverse pipes are arranged in parallel and are spaced apart, the plurality of longitudinal pipes are arranged in parallel and are spaced apart, the transverse pipes and the longitudinal pipes are arranged in cross, each transverse pipe is connected with the gas inlet pipe, each longitudinal pipe is connected with the plurality of transverse pipes, and each longitudinal pipe is provided with a plurality of bubble generators arranged along the extension direction of the longitudinal pipe.

[0019] In some embodiments, a gas circulation system is included, the gas circulation system comprises a gas-liquid separator, the gas-liquid separator is connected with the shell, and the gas-liquid separator is used to introduce the gas-liquid mixture of the gas and the first medium in the shell and realize gas-liquid separation of the gas-liquid mixture.

[0020] In some embodiments, the gas circulation system further comprises:

[0021] a first pipeline, the first pipeline is connected between the shell and the inlet of the gas-liquid separator, and the first pipeline is used to introduce the gas-liquid mixture into the gas-liquid separator;

[0022] A second pipeline is connected between the gas outlet of the gas-liquid separator and the heat exchanger, and is used to return the gas separated by the gas-liquid separator to the bubbling system through the heat exchanger.

[0023] A third pipeline is connected between the liquid outlet of the gas-liquid separator and the heat exchanger, and is used to return the liquid separated by the gas-liquid separator to the shell through the heat exchanger.

[0024] In some embodiments, the shell is provided with an exhaust port for exhausting the gas in the shell when the pressure in the shell exceeds a set threshold value.

[0025] And / or, the first medium is a high dielectric constant medium, and the first medium is non-conductive.

[0026] The use method of the battery device of the embodiments of the present application comprises the following steps:

[0027] When the temperature of at least part of the single batteries is higher than a first threshold value, the temperature of the second medium to the heat exchange plate is lowered, and the first medium is blown into foam through the bubbling system.

[0028] When the temperature of at least part of the single batteries is lower than a second threshold value, the temperature of the second medium to the heat exchange plate is increased, and the first medium is blown into foam through the bubbling system.

[0029] Beneficial effects: the battery device and use method of the embodiments of the present application can improve the temperature control effect, avoid uneven temperature adjustment, and avoid problems such as interface abnormality and cycle life damage caused by uneven battery current distribution, thereby ensuring good operation of the battery device. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is an explosion schematic diagram of the battery device of the embodiments of the present application.

[0031] Reference signs:

[0032] 1 - shell;

[0033] 2 - single battery;

[0034] 3 - temperature adjustment system; 31 - heat exchange plate; 32 - liquid inlet pipe; 33 - liquid outlet pipe;

[0035] 4 - bubbling system; 41 - gas inlet pipe; 42 - gas guide pipe; 421 - transverse pipe; 422 - longitudinal pipe; 43 - bubble generator;

[0036] 5 - heat exchanger;

[0037] 6 - gas circulation system; 61 - gas-liquid separator; 62 - first pipeline; 63 - second pipeline; 64 - third pipeline. DETAILED DESCRIPTION

[0038] Embodiments of the present application are described in detail below with reference to examples illustrated in the accompanying drawings. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0039] The present application is based on the discovery and recognition of the inventors on the following facts and problems:

[0040] The current market has increasingly high performance requirements for secondary batteries, requiring secondary batteries to have high energy density, fast charging, fast discharging, long cycle life, and other characteristics. In order to meet the more convenient use needs of automobile users, the current super-fast charging has become the focus of battery technology development, that is, the charging rate has increased from 1C to the current peak current of 6-7C. According to the heat production formula Q=I 2 Rt, it can be known that with a large increase in the charging rate, the battery heat production will increase sharply, which will in turn cause the battery to operate under high temperature conditions.

[0041] Secondly, in order to meet the fast charging requirements, the electrolyte solvent in the secondary battery usually uses a low-boiling-point small-molecule solvent, which can easily cause the battery to produce gas and other problems under high temperature conditions, affecting the overall life and safety; and when the ambient temperature is low, if fast charging is used, it will easily cause metal lithium to precipitate, thereby causing a safety hazard. Therefore, in order to ensure the good operation of the battery, the battery has increasingly high requirements for the temperature control system.

[0042] The current part of the vehicle adopts the form of air cooling, that is, mainly relies on the air from the outside to be blown into the battery pack for heat exchange to take away the heat. This method has limited heat dissipation efficiency and can only be applied in a state where the temperature rise is not high, and it is difficult to control the temperature below the required temperature.

[0043] And the slightly higher-end vehicle adopts a liquid cooling method, in which the cooling liquid is in contact with one or more of the bottom surface, the large surface, and the side surface of the battery through the liquid cooling plate. Heat is conducted between the shell and the liquid cooling plate to take away the heat on the surface of the battery, thereby achieving the purpose of cooling and temperature control.

[0044] However, the battery pack has limited space in the vehicle, and it is relatively difficult to simultaneously install liquid cooling plates on each surface of the battery. This design will also greatly increase the weight of the battery pack. Therefore, the liquid cooling method can cool down, but mainly for local cooling of the battery, which can easily cause uneven temperature distribution, thereby causing uneven current distribution of the battery, interface abnormalities, and damage to the cycle life.

[0045] For example, Figure 1As shown, the battery device of this embodiment includes a housing 1, a plurality of individual cells 2, a temperature control system 3, and a bubbling system 4.

[0046] Multiple individual battery cells 2 are disposed within a housing 1, and a first medium is stored within the housing 1, the first medium immersing at least a portion of each individual battery cell 2. For example, the individual battery cells 2 can be batteries of the type such as lithium batteries, and the multiple individual battery cells 2 can be assembled into modules, and then the multiple battery modules can be assembled within the housing 1. In some other embodiments, the multiple individual battery cells 2 can also be arranged in a matrix and directly assembled within the housing 1.

[0047] The housing 1 can be divided into two parts. For example, the housing 1 may include an upper housing and a lower housing. The upper housing may be a cover-like structure, while the lower housing may be a generally flat structure. The aforementioned multiple individual batteries 2 can be fixed on the lower housing, and the upper housing is sealed and assembled on the lower housing and covers the outer periphery of the multiple individual batteries 2.

[0048] It should be noted that after the housing 1 is sealed, a first medium can be poured into the housing 1. The first medium does not need to completely fill the housing 1; for example, the first medium can only submerge the bottom or lower middle part of each individual battery cell 2. The first medium is a high dielectric constant medium and is non-conductive.

[0049] Specifically, the first medium can be ethylene glycol. This ensures that the first medium will not cause a short circuit within the casing 1. Furthermore, it is relatively stable and does not easily decompose under high voltage, and also has flame-retardant properties, fully meeting the requirements for use.

[0050] The temperature control system 3 includes a heat exchange plate 31 disposed in the housing 1. The heat exchange plate 31 is attached to at least a portion of the individual cells 2 to achieve heat exchange between the second medium and the individual cells 2 when the temperature control system 3 is introduced into the second medium.

[0051] For example, such as Figure 1 As shown, the temperature control system 3 can be a liquid cooling system. The temperature control system 3 can include multiple heat exchange plates 31. Each heat exchange plate 31 can be a long plate and can extend along the left and right direction. The multiple heat exchange plates 31 can be arranged at intervals in the front and back direction. Each single cell 2 can be respectively disposed between two heat exchange plates 31, that is, the front and rear sides of each single cell 2 can be in contact with the corresponding heat exchange plate 31.

[0052] In use, a second medium, such as water or other liquid temperature-regulating medium, can be circulated into each heat exchange plate 31 through the temperature control system 3. The second medium can regulate the temperature of the corresponding individual battery 2 through heat exchange, thereby preventing the operating temperature of the individual battery 2 from being too high or too low.

[0053] The bubbling system 4 is used to introduce gas into the first medium to blow the first medium into foam to cover each surface of the single battery 2 when the temperature of the single battery 2 is adjusted by the temperature adjustment system 3.

[0054] For example, as shown in Figure 1 The bubbling system 4 can include a bubbling pipeline or the like arranged in the shell 1, the bubbling pipeline can be provided with a gas outlet hole for gas to flow out, and the bubbling pipeline can be completely immersed in the first medium.

[0055] When the temperature of the single battery 2 is adjusted by the temperature adjustment system 3, the bubbling system 4 can introduce gas into the first medium, and under the action of the gas, the first medium can be blown into foam, the foam can fill the space between the heat exchange plate 31 and the single battery 2 which is not in contact, and the foam can realize sufficient contact between the multiple heat exchange plates 31 and the surfaces of the multiple single batteries 2, thereby enhancing the overall temperature adjustment effect.

[0056] Secondly, since the first medium is located at the bottom of the shell 1, at the beginning, the low-temperature bubbles will gradually flow upwards, and in the process of moving, the bubbles will expand and burst, and the liquid after the burst will flow to the bottom of the shell 1 again, so that the circulation of the first medium in the up-down direction of the shell 1 can be realized, and the overall heat exchange process is in a dynamic state rather than a static state, further improving the overall heat exchange effect and the uniformity of heat exchange at each position.

[0057] The battery equipment of the embodiment of the present application simultaneously sets the temperature adjustment system 3 and the bubbling system 4, and the heat exchange effect and the uniformity of heat exchange between the temperature adjustment system 3 and the multiple single batteries 2 can be enhanced by the bubbling system 4, the temperature control effect of the single battery 2 is improved, the temperature adjustment unevenness is avoided, and the problems of interface abnormality, cycle life damage and the like caused by uneven battery current distribution are avoided, the good operation of the battery equipment is ensured, and the problems of battery gas production and lithium precipitation are also avoided.

[0058] In some embodiments, the battery equipment includes a temperature adjustment device, the temperature adjustment device is arranged in the bubbling system 4, and the temperature adjustment device is used to adjust the temperature of the gas to make the temperature of the gas flowing to the first medium equivalent to the temperature of the second medium flowing to the heat exchange plate 31.

[0059] For example, the temperature adjusting device can have the functions of heating and cooling, the temperature adjusting device can be installed only at the inlet of the bubbling system 4, the temperature of the second medium introduced by the temperature adjusting system 3 can be obtained in advance, and the temperature of the gas can be adjusted first before the gas is introduced into the first medium, so that the temperature of the gas is basically consistent with the temperature of the second medium, the situation that the temperature difference between the gas and the second medium is large and the temperature adjusting effect on the single battery 2 is reduced is improved, the situation that the heat distribution in the shell 1 is abnormal due to the large temperature difference is avoided, and the stability and reliability of the overall operation of the battery equipment are ensured.

[0060] In some embodiments, the temperature adjusting device is a heat exchanger 5, the heat exchanger 5 is arranged between the temperature adjusting system 3 and the bubbling system 4, and the heat exchanger 5 is used to realize heat exchange between the gas and the second medium so that the temperatures of the gas and the second medium are substantially equal.

[0061] For example, as shown in Figure 1 The heat exchanger 5 can have a cylindrical structure, and two relatively independent first and second channels can be arranged in the heat exchanger 5, the first channel can be connected with the temperature adjusting system 3 and used for the flow of the second medium, and the second channel can be connected with the bubbling system 4 and used for the flow of the gas. The second medium and the gas can realize heat exchange in the heat exchanger 5, so as to reduce the temperature difference between the gas and the second medium.

[0062] The arrangement of the heat exchanger 5 can realize heat exchange between the gas and the second medium, avoid the need for additional heating or cooling by other energy, reduce energy consumption, and simplify the overall structure.

[0063] In some embodiments, as shown in Figure 1 The temperature adjusting system 3 includes an inlet pipe 32 and an outlet pipe 33, and the inlet pipe 32 and the outlet pipe 33 pass through the shell 1. For example, two through holes can be arranged on the upper shell of the shell 1, and the two through holes can be arranged at opposite corners of the top wall of the upper shell. The inlet pipe 32 and the outlet pipe 33 can pass through the corresponding through holes, respectively. The inlet pipe 32 is used to introduce the second medium into the heat exchange plate 31, and the outlet pipe 33 is used to discharge the second medium in the heat exchange plate 31.

[0064] The inlet pipe 32 is connected with the heat exchanger 5, for example, the inlet pipe 32 can be directly connected with the outlet of the first channel, so that the second medium can flow through the heat exchanger 5.

[0065] The heat exchange plate 31 has a plurality of heat exchange plates 31 arranged between the inlet pipe 32 and the outlet pipe 33. For example, as shown in Figure 1As shown, the heat exchange plates 31 can be provided with three, which can be arranged in the front-rear direction with intervals, and each of which can extend along the left-right direction. The left end of each heat exchange plate 31 can be communicated with the liquid inlet pipe 32, and the right end of each heat exchange plate 31 can be communicated with the liquid outlet pipe 33, so as to meet the use needs of transporting the second medium into the plurality of heat exchange plates 31 through the same liquid inlet pipe 32, and then discharging the second medium in the plurality of heat exchange plates 31 through the liquid outlet pipe 33.

[0066] In some embodiments, as shown in Figure 1 The bubbling system 4 includes a gas inlet pipe 41, a plurality of gas guide pipes 42 and a plurality of bubble generators 43. The gas inlet pipe 41 is connected with the heat exchanger 5. For example, the gas inlet pipe 41 can be connected with the outlet of the above-mentioned second passage of the heat exchanger 5, so that the gas after heat exchange in the heat exchanger 5 can be directly discharged into the gas inlet pipe 41.

[0067] The plurality of gas guide pipes 42 are arranged in the shell 1 and are all connected with the gas inlet pipe 41. For example, the plurality of gas guide pipes 42 are all communicated and can form a network structure, and the plurality of gas guide pipes 42 can all be communicated with the above-mentioned gas inlet pipe 41, so that the gas in the gas inlet pipe 41 can be simultaneously transported into the plurality of gas guide pipes 42.

[0068] As shown in Figure 1 The plurality of bubble generators 43 are arranged in the plurality of gas guide pipes 42, and the plurality of bubble generators 43 are arranged on the network structure formed by the plurality of gas guide pipes 42, and at least part of each bubble generator 43 is immersed in the first medium, for example, each bubble generator 43 can be completely immersed in the first medium. When the gas inlet pipe 41 is filled with gas, each bubble generator 43 can enhance the generation of bubbles or foam, so as to improve the efficiency of blowing the first medium into foam.

[0069] In some embodiments, the plurality of gas guide pipes 42 include a plurality of transverse pipes 421 and a plurality of longitudinal pipes 422, the plurality of transverse pipes 421 are arranged in parallel with intervals, the plurality of longitudinal pipes 422 are arranged in parallel with intervals, the transverse pipes 421 and the longitudinal pipes 422 are arranged in cross, each transverse pipe 421 is connected with the gas inlet pipe 41, each longitudinal pipe 422 is connected with the plurality of transverse pipes 421, and each longitudinal pipe 422 is provided with a plurality of bubble generators 43 arranged along the extension direction of the longitudinal pipe 422.

[0070] For example, as shown in Figure 1 The transverse pipe 421 can be provided with two, which can extend along the left-right direction and be arranged in the front-rear direction with intervals. The longitudinal pipe 422 can be provided with four, which can extend along the front-rear direction and be arranged in the left-right direction with intervals.

[0071] Each longitudinal pipe 422 can pass through the two transverse pipes 421 along the front-rear direction and communicate with each transverse pipe 421. The gas inlet pipe 41 can be provided with two branch pipes which respectively communicate with the two transverse pipes 421. Three bubble generators 43 can be installed on each longitudinal pipe 422 and are arranged at equal intervals along the extension direction of the longitudinal pipe 422. Thus, the uniformity of the arrangement of the bubble generators 43 is ensured, and the uniform distribution of the foam in the shell 1 is ensured.

[0072] In some embodiments, as shown in FIG. 1, the battery device comprises a gas circulation system 6, which comprises a gas-liquid separator 61 connected to the shell 1 and used for passing the gas-liquid mixture in the shell 1 into the gas-liquid separator 61 and realizing gas-liquid separation of the gas-liquid mixture. Figure 1

[0073] Thus, on the one hand, the discharge of part of the gas-liquid mixture in the shell 1 is realized by the gas-liquid separator 61, so as to avoid the case that the pressure in the shell 1 is too high. On the other hand, the gas-liquid separation is realized, so as to facilitate the recycling of the gas and the recovered first medium, thereby reducing the cost.

[0074] In some embodiments, as shown in FIG. 1, the battery device comprises a gas circulation system 6, which comprises a gas-liquid separator 61 connected to the shell 1 and used for passing the gas-liquid mixture in the shell 1 into the gas-liquid separator 61 and realizing gas-liquid separation of the gas-liquid mixture. Figure 1

[0075] The first pipeline 62 is connected between the shell 1 and the inlet of the gas-liquid separator 61, and is used for passing the gas-liquid mixture into the gas-liquid separator 61. Thus, the effect of reducing the pressure in the shell 1 is realized, and the problem that the battery device is damaged due to the continuous passing of the gas and the too high pressure is avoided.

[0076] The second pipeline 63 is connected between the gas outlet of the gas-liquid separator 61 and the heat exchanger 5, and is used for returning the separated gas of the gas-liquid separator 61 to the bubble system 4 via the heat exchanger 5. Thus, the re-supply of the separated gas to the battery device is realized.

[0077] The third pipeline 64 is connected between the liquid outlet of the gas-liquid separator 61 and the heat exchanger 5, and is used for returning the separated liquid of the gas-liquid separator 61 to the shell 1 via the heat exchanger 5. Thus, the re-supply of the separated liquid to the battery device is realized.

[0078] ​​In some embodiments, the shell 1 is provided with an exhaust port for exhausting gas in the shell 1 when the pressure in the shell 1 exceeds a set threshold. For example, the exhaust port can be provided on the top wall of the shell 1, and the exhaust port can be provided with a pressure relief valve or the like structure, so that when the pressure in the shell 1 is too high, part of the gas can be exhausted through the exhaust port, so that the pressure in the shell 1 can always be maintained within a reasonable range.

[0079] The use method of the embodiments of the present application is described below.

[0080] The use method of the embodiments of the present application includes the following steps:

[0081] When the temperature of at least part of the single battery 2 is higher than the first threshold, the temperature of the second medium to the heat exchange plate 31 is lowered and the first medium is blown into foam by the bubbling system 4. For example, during use, when the battery operating temperature is high, for example, the temperature exceeds 30℃, etc., at this time, the inlet temperature of the second medium introduced by the temperature adjusting system 3 can be lowered to below 25℃. At the same time, the bubbling system 4 can be turned on at the same time, so that rapid cooling of the single battery 2 can be achieved.

[0082] When the temperature of at least part of the single battery 2 is lower than the second threshold, the temperature of the second medium to the heat exchange plate 31 is increased and the first medium is blown into foam by the bubbling system 4. For example, when the battery device is charging, when the battery temperature is lower than 20℃, the inlet temperature of the second medium of the temperature adjusting system 3 can be controlled to be above 25℃, and at the same time, the bubbling system 4 can be turned on at the same time, so that the battery operating temperature can be controlled to be between 20-40℃.

[0083] In some embodiments, the amount of gas introduced by the bubbling system 4 per unit time can also be adjusted, so that the adjustment of the bubbling efficiency can be achieved.

[0084] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship 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, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0085] In addition, the terms "first", "second", etc. are used only for the purpose of description and do not imply or imply relative importance or imply the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified.

[0086] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication or interaction of two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0087] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be directly in contact with the first and second features, or indirectly in contact with the first and second features through an intermediate medium. Moreover, the first feature "on", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0088] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in the specification and the features of different embodiments or examples without contradiction.

[0089] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and cannot be construed as limiting the present application, and the changes, modifications, replacements and variations of the above embodiments made by those skilled in the art are within the scope of the present application.

Claims

1. A battery device characterized by comprising: The application relates to a battery temperature control system, which comprises the following parts: a shell and a plurality of single batteries, the plurality of single batteries are arranged in the shell, and the shell stores a first medium, the first medium immerses at least part of each single battery; a temperature control system, which comprises heat exchange plates arranged in the shell, the heat exchange plates are attached to at least part of the single batteries to realize heat exchange between the second medium and the single batteries when the temperature control system is supplied with the second medium; a bubbling system, which is used for supplying gas into the first medium to blow the first medium into foam covering the surface of each single battery when the temperature control system controls the temperature of the single batteries, the foam is used for filling the space between the heat exchange plates and the single batteries not contacted with the heat exchange plates, so that the heat exchange plates are contacted with the surface of the plurality of single batteries.

2. The battery device according to claim 1, characterized by, The temperature control system comprises a temperature adjusting device arranged in the bubbling system, and the temperature adjusting device is used for adjusting the temperature of the gas so that the temperature of the gas flowing to the first medium is equivalent to the temperature of the second medium flowing to the heat exchange plates.

3. The battery device according to claim 2, characterized by The temperature adjusting device is a heat exchanger arranged in the temperature control system and the bubbling system, and the heat exchanger is used for realizing heat exchange between the gas and the second medium so that the temperature of the gas is equivalent to the temperature of the second medium.

4. The battery device according to claim 3, characterized by The temperature control system comprises: an inlet pipe and an outlet pipe, the inlet pipe and the outlet pipe both pass through the shell, the inlet pipe is used for supplying the second medium to the heat exchange plates, the outlet pipe is used for discharging the second medium in the heat exchange plates, and the inlet pipe is connected with the heat exchanger, the heat exchange plates are a plurality of, and the plurality of heat exchange plates are arranged between the inlet pipe and the outlet pipe.

5. The battery device according to claim 3, characterized by The bubbling system comprises: an air inlet pipe connected with the heat exchanger; a plurality of air guide pipes arranged in the shell and connected with the air inlet pipe; a plurality of bubble generators arranged in the plurality of air guide pipes, at least part of each bubble generator is immersed in the first medium, and the bubble generator is used for blowing the first medium into foam.

6. The battery device according to claim 5, characterized by The plurality of air guide pipes comprises a plurality of transverse pipes and a plurality of longitudinal pipes, the plurality of transverse pipes are arranged in parallel and at intervals, the plurality of longitudinal pipes are arranged in parallel and at intervals, the transverse pipes and the longitudinal pipes are arranged in cross, each transverse pipe is connected with the air inlet pipe, each longitudinal pipe is connected with the plurality of transverse pipes, and each longitudinal pipe is provided with a plurality of bubble generators arranged at intervals along the extension direction of the longitudinal pipe.

7. The battery device according to claim 3, characterized by The application further relates to a gas circulation system, which comprises a gas-liquid separator connected with the shell, and the gas-liquid separator is used for supplying a gas-liquid mixture of the gas and the first medium in the shell and realizing gas-liquid separation of the gas-liquid mixture.

8. The battery device according to claim 7, characterized by The gas circulation system further comprises: a first pipeline connected between the shell and the inlet of the gas-liquid separator, and the first pipeline is used for supplying the gas-liquid mixture into the gas-liquid separator; a second conduit connected between a gas outlet of the gas-liquid separator and the heat exchanger, and configured to return the gas separated by the gas-liquid separator to the bubble system via the heat exchanger; a third conduit connected between a liquid outlet of the gas-liquid separator and the heat exchanger, and configured to return the liquid separated by the gas-liquid separator to the housing via the heat exchanger.

9. The battery device according to any one of claims 1-8, wherein, the housing is provided with a gas outlet configured to allow gas in the housing to be discharged when the pressure in the housing exceeds a set threshold; and / or, the first medium is a high dielectric constant medium, and the first medium is non-conductive.

10. A method of using a battery device according to any one of the preceding claims 1-9, characterized by comprising the steps of: when the temperature of at least part of the single cells is higher than a first threshold, reducing the temperature of the second medium to the heat exchange plates and blowing the first medium into foam by the bubble system; when the temperature of at least part of the single cells is lower than a second threshold, increasing the temperature of the second medium to the heat exchange plates and blowing the first medium into foam by the bubble system.

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