Battery device and method of use

Abstract

The invention discloses battery equipment and a use method, the battery equipment comprises a shell, a plurality of single batteries, a temperature adjusting system and a bubbling system, the plurality of single batteries are arranged in the shell, a first medium is stored in the shell, and the first medium immerses at least part of each single battery; the temperature adjusting system comprises a heat exchange plate arranged in the shell, and the heat exchange plate is attached to at least part of the single batteries so as to realize heat exchange between a second medium and the single batteries when the second medium is introduced into the temperature adjusting system; and the bubbling system is used for introducing gas into the first medium so as to blow the first medium into foam covering each surface of each single battery when the temperature adjusting system adjusts the temperature of the single batteries. According to the battery equipment, the temperature control effect can be improved, the condition of non-uniform temperature adjustment is avoided, the problems of interface abnormity, cycle life damage and the like caused by non-uniform battery current distribution are further avoided, and good operation of the battery equipment is ensured.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a battery device and a use method. Background Art

[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 operate well within a reasonable temperature range. Therefore, power batteries usually require auxiliary air cooling, liquid cooling and other forms of temperature control systems to achieve temperature control. However, due to factors such as temperature control methods and temperature control processes, power batteries in related technologies still have poor temperature control effects and uneven temperature control, which will lead to uneven battery current distribution, interface abnormalities, and reduced cycle life. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the present invention proposes a battery device that can improve the temperature control effect, avoid uneven temperature adjustment, and further avoid problems such as interface abnormalities and damaged cycle life caused by uneven battery current distribution, thereby ensuring the smooth operation of the battery device.

[0005] The embodiment of the present invention further provides a method for using the battery device.

[0006] The battery device of the embodiment of the present invention comprises:

[0007] A housing and a plurality of single cells, wherein the plurality of single cells are disposed in the housing, and a first medium is stored in the housing, wherein the first medium immerses at least a portion of each of the single cells;

[0008] A temperature control system, the temperature control system comprising a heat exchange plate disposed in the housing, the heat exchange plate being attached to at least part of the single cells so as to achieve heat exchange between the second medium and the single cells when the second medium is introduced into the temperature control system;

[0009] A bubbling system is used to introduce gas into the first medium so as to blow the first medium into foam covering each surface of each of the single cells when the temperature control system controls the temperature of the single cells.

[0010] In some embodiments, a temperature regulating device is included, the temperature regulating device is disposed in the bubbling system, and the temperature regulating device is used to regulate 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 plate.

[0011] In some embodiments, the temperature control device is a heat exchanger, which is provided in the temperature control system and the bubbling system, and is used to achieve heat exchange between the gas and the second medium so that the temperatures of the gas and the second medium are equivalent.

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

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

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

[0015] an air intake pipe connected to the heat exchanger;

[0016] A plurality of air guide pipes, wherein the plurality of air guide pipes are arranged in the shell and are all connected to the air inlet pipe;

[0017] A plurality of bubble generators are disposed on the plurality of air guide tubes, at least a portion 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 air guide tubes include a plurality of transverse tubes and a plurality of longitudinal tubes, the plurality of transverse tubes are arranged in parallel and spaced apart, the plurality of longitudinal tubes are arranged in parallel and spaced apart, the transverse tubes and the longitudinal tubes are arranged crosswise, each of the transverse tubes is connected to the air inlet tube, each of the longitudinal tubes is connected to the plurality of transverse tubes, and each of the longitudinal tubes is provided with a plurality of the bubble generators spaced apart along the extension direction of the longitudinal tube.

[0019] In some embodiments, a gas circulation system is included, and the gas circulation system includes a gas-liquid separator, which is connected to the shell and is used to allow the gas in the shell and the gas-liquid mixture of the first medium to pass into the shell and achieve 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 being connected between the shell and the inlet of the gas-liquid separator, and the first pipeline being used for allowing the gas-liquid mixture to pass into the gas-liquid separator;

[0022] a second pipeline, the second pipeline being connected between the gas outlet of the gas-liquid separator and the heat exchanger, and the second pipeline being used to discharge the gas separated by the gas-liquid separator back to the bubbling system via the heat exchanger;

[0023] The third pipeline is connected between the liquid outlet of the gas-liquid separator and the heat exchanger, and the second pipeline is used to discharge the liquid separated by the gas-liquid separator back into the shell via the heat exchanger.

[0024] In some embodiments, the shell is provided with an exhaust port, and the exhaust port is used to allow the gas in the shell to be discharged when the pressure in the shell exceeds a set threshold;

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

[0026] The method of using the embodiment of the present invention comprises the following steps:

[0027] When the temperature of at least part of the single cells is higher than a first threshold, lowering the temperature of the second medium passing through the heat exchange plate and blowing the first medium into foam through the bubbling system;

[0028] When the temperature of at least part of the single batteries is lower than a second threshold, the temperature of the second medium passing 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 invention can improve the temperature control effect, avoid uneven temperature adjustment, and further avoid problems such as interface abnormalities and damaged cycle life caused by uneven battery current distribution, thereby ensuring the good operation of the battery device. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Schematic diagram of an explosion of a battery device according to an embodiment of the present invention.

[0031] Reference numerals:

[0032] 1- housing;

[0033] 2-monocell;

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

[0035] 4-bubble system; 41-air inlet pipe; 42-air 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 invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0039] The present invention is based on the inventor's discovery and understanding of the following facts and problems:

[0040] The current market has higher and higher performance requirements for secondary batteries, requiring secondary batteries to have high energy density, fast charging, fast discharge, long cycle life, etc. In order to meet the needs of car users for more convenient use, 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 generation formula Q = I 2 Rt, it can be seen that with the substantial increase in the charging rate, the heat generated by the battery will increase dramatically, which will cause the battery to operate under high temperature conditions.

[0041] Secondly, in order to meet the requirements of fast charging, the electrolyte solvent in the secondary battery usually uses a low-boiling point small molecule solvent. This solvent is easy to cause problems such as battery gas production 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 the precipitation of metallic lithium, thus creating a safety hazard. Therefore, in order to ensure the good operation of the battery, the battery has higher and higher requirements for the temperature control system.

[0042] Currently, some vehicle models use air cooling, which mainly relies on blowing outside air into the battery pack for heat exchange and then taking away the heat. This method has limited heat dissipation efficiency and can only be used when the temperature rise is not high. It is difficult to control the temperature below the required temperature.

[0043] Slightly higher-end models use liquid cooling, where the cooling liquid comes into contact with one or more of the bottom, large, or side surfaces of the battery through a liquid cooling plate. Heat is conducted between the shell and the liquid cooling plate, taking away the heat from the battery surface, thereby achieving the purpose of cooling and temperature control.

[0044] However, the battery pack has limited space inside the car, and it is difficult to install liquid cooling plates on all battery surfaces at the same time. Such a design will also significantly increase the weight of the battery pack. Therefore, liquid cooling can be used to reduce the temperature, but it mainly cools the battery locally, which is prone to uneven temperature distribution, resulting in uneven battery current distribution, interface abnormalities, and damaged cycle life.

[0045] like Figure 1As shown, the battery device according to the embodiment of the present invention includes a housing 1 , a plurality of single batteries 2 , a temperature control system 3 and a bubbling system 4 .

[0046] A plurality of single cells 2 are disposed in the housing 1, and a first medium is stored in the housing 1, and the first medium immerses at least a portion of each single cell 2. For example, the single cell 2 may be a lithium battery or other type of battery, and the plurality of single cells 2 may be assembled into a module, and then the plurality of battery modules may be assembled in the housing 1. In some other embodiments, the plurality of single cells 2 may also be arranged in a matrix and directly assembled in the housing 1.

[0047] The housing 1 can be provided in a split form, for example, the housing 1 can include an upper housing 1 and a lower housing 1, the upper housing 1 can be a cover-shaped structure, and the lower housing 1 can be a substantially flat plate-shaped structure. The above-mentioned multiple single batteries 2 can all be fixed on the lower housing 1, and the upper housing 1 is sealed and assembled on the lower housing 1 and covers the outer peripheral side of the multiple single batteries 2.

[0048] It should be noted that after the shell 1 is sealed, the first medium can be poured into the shell 1, and the first medium may not fill the shell 1. For example, the first medium may only immerse the bottom or the lower middle part of each single battery 2. The first medium is a high dielectric constant medium, and the first medium is non-conductive.

[0049] Specifically, the first medium may be ethylene glycol, so that the first medium will not cause a short circuit in the housing 1, and at the same time, it is relatively stable and not easy to decompose under high voltage, and also has a flame retardant effect, which fully meets the needs of 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 single battery 2 to achieve heat exchange between the second medium and the single battery 2 when the second medium is introduced into the temperature control system 3 .

[0051] For example, Figure 1 As shown, the temperature control system 3 may be a liquid cooling system, and the temperature control system 3 may include a plurality of heat exchange plates 31, each of which may be in the shape of a long plate and may extend in the left-right direction, and the plurality of heat exchange plates 31 may be arranged at intervals in the front-back direction. Each of the above-mentioned single cells 2 may be respectively arranged between two heat exchange plates 31, that is, the front side and the rear side of each single cell 2 may be in contact with the corresponding heat exchange plate 31.

[0052] When in use, the first medium can be circulated into each heat exchange plate 31 through the temperature control system 3. The first medium can be a liquid temperature control medium such as water. The first medium can adjust the temperature with the corresponding single battery 2 through heat exchange, thereby avoiding the operating temperature of the single battery 2 being too high or too low.

[0053] The bubbling system 4 is used to introduce gas into the first medium so as to blow the first medium into foam covering each surface of each single battery 2 when the temperature control system 3 controls the temperature of the single battery 2 .

[0054] For example, Figure 1 As shown, the bubbling system 4 may include a bubbling pipeline arranged in the shell 1, etc. The bubbling pipeline may be provided with a bubbling hole for gas to flow out, and the bubbling pipeline may be completely immersed in the above-mentioned first medium.

[0055] While the temperature of the single cell 2 is adjusted by the temperature control system 3, the bubbling system 4 can introduce gas into the first medium. Under the action of the gas, the first medium can be blown into foam, and the foam can fill the space between the heat exchange plate 31 and the uncontacted single cell 2. The foam can achieve full contact between the surfaces of multiple heat exchange plates 31 and multiple single cells 2, thereby enhancing the overall temperature control 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 upward, and in the process of moving, the bubbles will expand and burst, and the burst liquid will flow to the bottom of the shell 1 again, thereby realizing the circulation of the first medium in the upper and lower directions of the shell 1, making the overall heat exchange process dynamic rather than static, further improving the overall heat exchange effect and the uniformity of heat exchange at each position.

[0057] The battery device of the embodiment of the present invention, by simultaneously providing a temperature control system 3 and a bubbling system 4, can enhance the heat exchange effect and uniformity of heat exchange between the temperature control system 3 and multiple single cells 2 through the bubbling system 4, thereby improving the temperature control effect of the single cells 2 and avoiding uneven temperature control, thereby avoiding problems such as interface abnormalities and damaged cycle life due to uneven battery current distribution, ensuring the good operation of the battery device and avoiding problems such as battery gas production and lithium precipitation.

[0058] In some embodiments, the battery device includes a temperature regulating device, which is disposed in the bubbling system 4 and is used to regulate 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 plate 31 .

[0059] For example, the temperature control device can have the functions of heating and cooling. The temperature control device can be installed only at the inlet of the bubbling system 4. The temperature of the second medium introduced into the above-mentioned temperature control system 3 can be obtained in advance. Before the bubbling device introduces gas into the first medium, the temperature of the gas can be first increased or decreased, so that the temperature of the gas is roughly consistent with the temperature of the second medium. This improves the situation where the temperature control effect on the single battery 2 is easily reduced due to the large temperature difference between the gas and the second medium, and avoids the situation where the heat distribution in the shell 1 is abnormal due to the large temperature difference, which is beneficial to ensure the stability and reliability of the overall operation of the battery equipment.

[0060] In some embodiments, the temperature control device is a heat exchanger 5, which is provided in the temperature control system 3 and the bubbling system 4, and 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 equivalent.

[0061] For example, Figure 1 As shown, the heat exchanger 5 can be generally cylindrical in structure, and two relatively independent first channels and second channels can be provided in the heat exchanger 5, wherein the first channel can be connected to the temperature control system 3 and used for the circulation of the second medium, and the second channel can be connected to the bubbling system 4 and used for the circulation of the gas. The second medium and the gas can realize heat exchange in the heat exchanger 5, thereby reducing the temperature difference between the gas and the second medium.

[0062] The setting of the heat exchanger 5 can realize heat exchange between the gas and the second medium, avoiding the need to use other energy for heating or cooling, which is beneficial to reducing energy consumption. Secondly, it can also fully reduce the temperature difference between the gas and the second medium, which is also beneficial to simplify the overall structural form.

[0063] In some embodiments, Figure 1 As shown, the temperature control system 3 includes a liquid inlet pipe 32 and a liquid outlet pipe 33, and the liquid inlet pipe 32 and the liquid outlet pipe 33 both pass through the shell 1. For example, two through holes can be respectively provided on the upper shell 1 of the shell 1, and the two through holes can be diagonally arranged and respectively provided at corresponding corners of the top wall of the upper shell 1. The above-mentioned liquid inlet pipe 32 and liquid outlet pipe 33 can respectively pass through the corresponding through holes, wherein the liquid inlet pipe 32 is used to introduce the second medium into the heat exchange plate 31, and the liquid outlet pipe 33 is used to discharge the second medium in the heat exchange plate 31.

[0064] The liquid inlet pipe 32 is connected to the heat exchanger 5 . For example, the liquid inlet pipe 32 can be directly connected to the outlet of the first channel, thereby facilitating the second medium to flow through the heat exchanger 5 .

[0065] There are multiple heat exchange plates 31, and the multiple heat exchange plates 31 are arranged between the liquid inlet pipe 32 and the liquid outlet pipe 33. For example, Figure 1As shown, three heat exchange plates 31 may be provided, and the three heat exchange plates 31 may be arranged at intervals in the front-to-back direction, and each heat exchange plate 31 may extend in the left-to-right direction. The left end of each heat exchange plate 31 may be connected to the liquid inlet pipe 32, and the right end of each heat exchange plate 31 may be connected to the liquid outlet pipe 33, thereby satisfying the use requirements of transporting the second medium into the multiple heat exchange plates 31 through the same liquid inlet pipe 32, and then discharging the second medium in the multiple heat exchange plates 31 through the liquid outlet pipe 33.

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

[0067] Multiple air ducts 42 are disposed in the housing 1 and are all connected to the air intake pipe 41. For example, the multiple air ducts 42 are all connected to form a mesh structure, and the multiple air ducts 42 are all connected to the air intake pipe 41, so that the gas in the air intake pipe 41 can be transported to the multiple air ducts 42 at the same time.

[0068] like Figure 1 As shown, a plurality of bubble generators 43 are provided on a plurality of air guide tubes 42, and the plurality of bubble generators 43 are evenly distributed on the mesh structure formed by the plurality of air guide tubes 42, and at least a portion 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 gas is introduced into the air inlet tube 41, each bubble generator 43 can enhance the generation of bubbles or foams, thereby improving the efficiency of blowing the first medium into foams.

[0069] In some embodiments, the multiple air guide tubes 42 include multiple transverse tubes 421 and multiple longitudinal tubes 422. The multiple transverse tubes 421 are arranged in parallel and spaced apart, and the multiple longitudinal tubes 422 are arranged in parallel and spaced apart. The transverse tubes 421 and the longitudinal tubes 422 are arranged crosswise. Each transverse tube 421 is connected to the air inlet tube 41, and each longitudinal tube 422 is connected to the multiple transverse tubes 421, and each longitudinal tube 422 is provided with multiple bubble generators 43 arranged at intervals along the extension direction of the longitudinal tube 422.

[0070] For example, Figure 1 As shown, there may be two transverse tubes 421, both of which may extend in the left-right direction and be spaced apart in the front-back direction. There may be four longitudinal tubes 422, both of which may extend in the front-back direction and be spaced apart in the left-right direction.

[0071] Each longitudinal tube 422 can pass through the two transverse tubes 421 along the front-to-back direction and communicate with each transverse tube 421. The air inlet pipe 41 can be provided with two branch pipes, which are respectively communicated with the two transverse tubes 421. Three bubble generators 43 can be installed on each longitudinal tube 422, and the three bubble generators 43 can be arranged at equal intervals along the extension direction of the longitudinal tube 422. Thereby, the uniformity of the arrangement of the bubble generators 43 is ensured, and then the uniform distribution of the foam in the housing 1 can be ensured.

[0072] In some embodiments, Figure 1 As shown, the battery device includes a gas circulation system 6, which includes a gas-liquid separator 61. The gas-liquid separator 61 is connected to the shell 1, and the gas-liquid separator 61 is used to allow the gas in the shell 1 and the gas-liquid mixture of the first medium to pass into and realize gas-liquid separation of the gas-liquid mixture.

[0073] Therefore, on the one hand, part of the gas-liquid mixture in the shell 1 can be discharged through the gas-liquid separator 61, thereby avoiding the situation where the pressure in the shell 1 is too high. On the other hand, gas-liquid separation is also achieved, which is conducive to the recycling and reuse of the gas and the recovered first medium, thereby reducing costs.

[0074] In some embodiments, Figure 1 As shown, the gas circulation system 6 further includes a first pipeline 62 , a second pipeline 63 and a third pipeline 64 .

[0075] The first pipeline 62 is connected between the housing 1 and the inlet of the gas-liquid separator 61, and the first pipeline 62 is used to supply the gas-liquid mixture to the gas-liquid separator 61. This reduces the pressure in the housing 1 and avoids the problem of excessive pressure caused by continuous gas flow and thus causing damage to the battery device.

[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 to discharge the gas separated by the gas-liquid separator 61 back to the bubbling system 4 via the heat exchanger 5, thereby realizing the re-supplement of the separated gas to the battery device.

[0077] The third pipeline 64 is connected between the liquid outlet of the gas-liquid separator 61 and the heat exchanger 5, and the second pipeline 63 is used to discharge the liquid separated by the gas-liquid separator 61 back into the housing 1 via the heat exchanger 5, thereby realizing the replenishment of the separated liquid to the battery device.

[0078] In some embodiments, the housing 1 is provided with an exhaust port, which is used to discharge the gas in the housing 1 when the pressure in the housing 1 exceeds a set threshold. For example, the exhaust port can be provided on the top wall of the housing 1, and the exhaust port can be provided with a pressure relief valve and other structural parts. When the pressure in the housing 1 is too high, part of the gas can be discharged through the exhaust port, so that the pressure of the housing 1 can always be maintained within a reasonable range.

[0079] The following describes the method of using the embodiment of the present invention.

[0080] The method of using the embodiment of the present invention comprises the following steps:

[0081] When the temperature of at least some of the single cells 2 is higher than the first threshold, the temperature of the second medium passing to the heat exchange plate 31 is reduced and the first medium is blown into foam through the bubbling system 4. For example, during use, when the battery operating temperature is high, for example, the temperature exceeds 30°C, the inlet temperature of the second medium passed through the temperature control system 3 can be reduced to below 25°C. At the same time, the bubbling system 4 can be turned on at the same time, so as to achieve rapid cooling of the single cells 2.

[0082] When the temperature of at least part of the single cells 2 is lower than the second threshold, the temperature of the second medium passing through the heat exchange plate 31 is increased and the first medium is blown into foam through the bubbling system 4. For example, when the battery device is charging, when the battery temperature is lower than 20°C, the inlet temperature of the second medium of the temperature control system 3 can be controlled to be above 25°C, 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 between 20-40°C.

[0083] In some embodiments, the amount of gas introduced into the bubbling system 4 per unit time can also be adjusted, thereby achieving adjustment of the bubbling efficiency.

[0084] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0085] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0086] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0087] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0088] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. 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 invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0089] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A battery device, characterized in that: include: A housing and a plurality of single cells, wherein the plurality of single cells are disposed in the housing, and a first medium is stored in the housing, wherein the first medium immerses at least a portion of each of the single cells; A temperature control system, the temperature control system comprising a heat exchange plate disposed in the housing, the heat exchange plate being attached to at least part of the single cells so as to achieve heat exchange between the second medium and the single cells when the second medium is introduced into the temperature control system; A bubbling system is used to introduce gas into the first medium so as to blow the first medium into foam covering each surface of each of the single cells when the temperature control system controls the temperature of the single cells.

2. The battery device according to claim 1, characterized in that: A temperature regulating device is included, which is arranged in the bubbling system and is used to regulate 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 plate.

3. The battery device according to claim 2, characterized in that: The temperature regulating device is a heat exchanger, which is provided in the temperature regulating system and the bubbling system, and 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 equivalent.

4. The battery device according to claim 3, characterized in that: The temperature control system comprises: A liquid inlet pipe and a liquid outlet pipe, both of which pass through the shell, the liquid inlet pipe is used to introduce the second medium into the heat exchange plate, the liquid outlet pipe is used to discharge the second medium in the heat exchange plate, and the liquid inlet pipe is connected to the heat exchanger, there are multiple heat exchange plates, and the multiple heat exchange plates are arranged between the liquid inlet pipe and the liquid outlet pipe.

5. The battery device according to claim 3, characterized in that: The bubbling system comprises: an air intake pipe connected to the heat exchanger; A plurality of air guide pipes, wherein the plurality of air guide pipes are arranged in the shell and are all connected to the air inlet pipe; A plurality of bubble generators are disposed on the plurality of air guide tubes, at least a portion of each bubble generator is immersed in the first medium, and the bubble generator is used to blow the first medium into foam.

6. The battery device according to claim 5, characterized in that: The multiple air guide tubes include multiple transverse tubes and multiple longitudinal tubes, the multiple transverse tubes are arranged in parallel and spaced apart, the multiple longitudinal tubes are arranged in parallel and spaced apart, the transverse tubes and the longitudinal tubes are arranged crosswise, each of the transverse tubes is connected to the air intake tube, each of the longitudinal tubes is connected to the multiple transverse tubes, and each of the longitudinal tubes is provided with a plurality of the bubble generators arranged at intervals along the extension direction of the longitudinal tube.

7. The battery device according to claim 3, characterized in that: It comprises a gas circulation system, wherein the gas circulation system comprises a gas-liquid separator, the gas-liquid separator is connected to the shell, and the gas-liquid separator is used to allow the gas in the shell and the gas-liquid mixture of the first medium to pass into the shell and realize gas-liquid separation of the gas-liquid mixture.

8. The battery device according to claim 7, characterized in that: The gas circulation system also includes: a first pipeline, the first pipeline being connected between the shell and the inlet of the gas-liquid separator, and the first pipeline being used for allowing the gas-liquid mixture to pass into the gas-liquid separator; a second pipeline, the second pipeline being connected between the gas outlet of the gas-liquid separator and the heat exchanger, and the second pipeline being used to discharge the gas separated by the gas-liquid separator back to the bubbling system via the heat exchanger; The third pipeline is connected between the liquid outlet of the gas-liquid separator and the heat exchanger, and the second pipeline is used to discharge the liquid separated by the gas-liquid separator back into the shell via the heat exchanger.

9. The battery device according to any one of claims 1 to 8, characterized in that: The shell is provided with an exhaust port, and the exhaust port is used to discharge the gas in the shell when the pressure in the shell 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 for using the battery device according to any one of claims 1 to 9, characterized in that: The following steps are involved: When the temperature of at least part of the single cells is higher than a first threshold, lowering the temperature of the second medium passing through the heat exchange plate and blowing the first medium into foam through the bubbling system; When the temperature of at least part of the single batteries is lower than a second threshold, the temperature of the second medium passing to the heat exchange plate is increased, and the first medium is blown into foam through the bubbling system.

Images