Battery cell immersion liquid cooling heat dissipation device and battery pack

Abstract

The invention relates to a battery cell immersion liquid cooling device and a battery pack, the battery cell immersion liquid cooling device comprises a plurality of battery cells, a plurality of shells, a first end cover, a second end cover, a liquid inlet and a liquid outlet, each shell is provided with an accommodating cavity, the accommodating cavity of each shell is used for accommodating the corresponding battery cell, and a gap is formed between the cavity wall of the accommodating cavity and the battery cell; each shell is provided with a first end cover and a second end cover, and the first end covers and the second end covers are arranged at intervals in the length direction of the shells so as to seal the containing cavities; the liquid inlet and the liquid outlet are both formed in the first end cover, the liquid inlet communicates with a liquid source, cooling liquid in the liquid source can flow into the containing cavity through the liquid inlet, and the liquid outlet is used for allowing the cooling liquid in the containing cavity to flow out. According to the battery cell immersion liquid cooling device, the battery cell in the accommodating cavity can be cooled, and the gap is formed between the cavity wall of the accommodating cavity and the battery cell, that is, the gap can be filled with the cooling liquid, that is, the cooling liquid can cool the six surfaces of the battery cell, so that the heat dissipation uniformity is improved.

Description

Technical Field

[0001] The present application relates to the field of liquid cooling technology, and in particular to a battery cell immersion liquid cooling device and a battery pack. Background Art

[0002] With the rapid development of energy storage and electric technology, multiple cells are integrated into a battery pack, which increases the capacity and voltage of the battery. However, in the related art, when the battery pack needs to be cooled, an immersion liquid cooling method is usually used to immerse the entire battery pack in the coolant for overall heat dissipation. However, adjacent cells are in contact with each other and interfere with each other, and a single cell cannot control the heat dissipation. Summary of the invention

[0003] Based on this, it is necessary to provide a battery cell immersion liquid cooling device and a battery pack to solve the problem of battery cell heat dissipation.

[0004] A battery cell immersion liquid cooling device, the battery cell immersion liquid cooling device comprising:

[0005] Multiple cells;

[0006] A plurality of shells, each of which has a receiving cavity, the receiving cavity of each of the shells is used to receive the corresponding battery cell, and there is a gap between the cavity wall of the receiving cavity and the battery cell;

[0007] A first end cover and a second end cover, each of the shells is provided with a first end cover and a second end cover, and the first end cover and the second end cover are arranged at intervals along the length direction of the shell to close the accommodating cavity;

[0008] A liquid inlet and a liquid outlet, each of the first end covers is provided with the liquid inlet and the liquid outlet, the liquid inlet is used to communicate with a liquid source so that the coolant in the liquid source can flow into the accommodating cavity through the liquid inlet, and the liquid outlet is used to allow the coolant in the accommodating cavity to flow out.

[0009] The above-mentioned battery cell immersion liquid cooling device installs the battery cell in the accommodating cavity of the shell, and then arranges the first end cover and the second end cover at intervals along the length direction of the shell, and both are connected to the shell, thereby closing the accommodating cavity. A liquid inlet and a liquid outlet are provided on the first end cover, and the liquid source is connected to the liquid inlet. The cooling liquid in the liquid source can flow into the accommodating cavity through the liquid inlet, so as to cool the battery cell in the accommodating cavity, and the cooling liquid can also be discharged to the outside of the accommodating cavity through the liquid discharge port. The battery cell immersion liquid cooling device provided in the present application can cool the battery cell in the accommodating cavity, and there is a gap between the cavity wall of the accommodating cavity and the battery cell, that is, the gap can be filled with cooling liquid, that is, the cooling liquid can cool the six sides of the battery cell, and the heat dissipation uniformity is improved. Moreover, each battery cell can be sleeved in the corresponding shell, and there will be no contact and interference between adjacent battery cells, and the heat dissipation of a single battery cell is controlled.

[0010] In one of the embodiments, a flow channel is provided on the cavity wall of the accommodating cavity, and the coolant can flow along the flow channel.

[0011] In one embodiment, the flow channel grooves are provided in plurality, and the plurality of flow channel grooves are arranged at intervals;

[0012] The first end cover and / or the second end cover is provided with a guide member, and the guide member is used to guide the flow direction of the coolant in the accommodating cavity so that the coolant flows along a preset track.

[0013] In one embodiment, the first end cover is further provided with a through hole for allowing the terminal of the battery cell to pass through;

[0014] The battery cell immersion liquid cooling device further comprises a sealing gasket, which is used to be sleeved on the terminal and at least partially disposed in the through hole.

[0015] In one of the embodiments, the battery cell immersion liquid cooling device further includes a quick-connect plug, and both the liquid inlet and the liquid outlet are equipped with the quick-connect plug.

[0016] The present application also provides a battery pack, comprising a shell and a plurality of battery cell immersion liquid cooling devices as described in any one of the above items, wherein the plurality of battery cell immersion liquid cooling devices are all arranged in the cavity of the shell.

[0017] In the battery pack, multiple cell immersion liquid cooling devices are installed in the cavity of the shell, so as to form an integrated battery pack, thereby improving the capacity and voltage of the battery. In the battery pack provided by the present application, each cell can be individually heat-dissipated and cooled, and the six sides of each cell can be heat-dissipated and cooled, thereby improving the uniformity of heat dissipation.

[0018] In one embodiment, the battery pack further includes a plurality of connecting plates, each of the battery cell immersion liquid cooling devices is provided with one connecting plate, the connecting plate having a first end and a second end, the first end being rotatably connected to the outer shell so that the second end can move toward or away from the outer shell to close or remove the corresponding battery cell immersion liquid cooling device.

[0019] In one of the embodiments, the battery pack further includes a magnetic lock and a fixing member, wherein the magnetic lock is arranged on the second end, and the fixing member is arranged on the outer shell, and when the connecting plate closes the cavity, the magnetic lock can be locked to the fixing member.

[0020] In one of the embodiments, a liquid inlet pipe and a liquid outlet pipe are disposed in the shell, the liquid inlet port can be communicated with the liquid inlet pipe, and the liquid outlet port can be communicated with the liquid outlet pipe.

[0021] In one of the embodiments, the battery pack further comprises an elastic member disposed in the cavity, wherein the elastic member is located between the battery cell immersion liquid cooling device and the inner bottom wall of the cavity, and the elastic member can push the battery cell immersion liquid cooling device to move in a direction extending out of the cavity through its own elastic force. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of a battery cell immersion liquid cooling device provided in an embodiment of the present application.

[0023] Figure 2 This is a disassembled diagram of the battery cell immersion liquid cooling device provided in an embodiment of the present application.

[0024] Figure 3 A cross-sectional view of a shell provided in an embodiment of the present application.

[0025] Figure 4 A schematic structural diagram of the end cover template from a first perspective provided in an embodiment of the present application.

[0026] Figure 5 A schematic structural diagram of the end cover template from a second perspective provided in an embodiment of the present application.

[0027] Figure 6 A schematic structural diagram of a battery pack from a first perspective provided in an embodiment of the present application.

[0028] Figure 7 A schematic structural diagram of the battery pack from a second perspective provided in an embodiment of the present application.

[0029] Figure 8 A schematic diagram of the structure of the arrangement of multiple battery cells immersed in a liquid cooling device in a battery pack provided in an embodiment of the present application.

[0030] In the figure:

[0031] 100, battery cell immersion liquid cooling device; 110, housing; 120, first end cover; 121, liquid inlet; 122, liquid outlet; 130, second end cover; 140, flow channel groove; 150, guide; 160, quick-connect plug; 170, sealing gasket; 180, nut; 190, end cover template;

[0032] 200, battery cell; 210, terminal;

[0033] 300, housing; 310, cover plate;

[0034] 400, connecting plate;

[0035] 500, magnetic lock;

[0036] 600, liquid inlet pipe;

[0037] 700, liquid outlet pipe;

[0038] 800, copper busbar;

[0039] 900. Elastic parts. DETAILED DESCRIPTION

[0040] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0041] In the description of the present application, it should be understood that if 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. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0042] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0043] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; 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 this application can be understood according to the specific circumstances.

[0044] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the 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. The first feature being "below", "below" and "below" the 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.

[0045] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0046] With the rapid development of energy storage and electric technology, multiple battery cells are integrated to form a battery pack, which improves the capacity and voltage of the battery. However, in the related art, when the battery pack needs to be cooled, the following three methods are generally used for heat dissipation. The first is air cooling, but the air cooling capacity can no longer meet the demand, and the noise is large. The second is cold plate heat dissipation, but the second heat dissipation method can only dissipate heat for the surface in contact with the cold plate, and has no heat dissipation effect on the remaining surfaces, and the heat dissipation is uneven. The third is immersion liquid cooling, which immerses the entire battery pack in the coolant for overall heat dissipation, but adjacent battery cells 200 are in contact with each other and interfere with each other, and a single battery cell cannot control the heat dissipation.

[0047] To this end, the present application provides a battery cell immersion liquid cooling device, such as Figures 1 to 5 As shown, the battery cell immersion liquid cooling device includes a plurality of battery cells 200, a plurality of shells 110, a first end cover 120, a second end cover 130, a liquid inlet 121 and a liquid outlet 122, each shell 110 has a receiving cavity, the receiving cavity of each shell 110 is used to receive the corresponding battery cell 200, and there is a gap between the cavity wall of the receiving cavity and the battery cell 200; each shell 110 is configured with a first end cover 120 and a second end cover 130, and the first end cover 120 and the second end cover 130 are arranged at intervals along the length direction of the shell 110 to close the receiving cavity; each first end cover 120 is provided with a liquid inlet 121 and a liquid outlet 122, the liquid inlet 121 is connected to a liquid source, the cooling liquid in the liquid source can flow into the receiving cavity through the liquid inlet 121, and the liquid outlet 122 is used for the cooling liquid in the receiving cavity to flow out.

[0048] The above-mentioned battery cell immersion liquid cooling device installs the battery cell 200 in the accommodating cavity of the shell 110, and then arranges the first end cover 120 and the second end cover 130 at intervals along the length direction of the shell 110, and both are connected to the shell 110, thereby closing the accommodating cavity. A liquid inlet 121 and a liquid outlet 122 are provided on the first end cover 120, and the liquid source is connected to the liquid inlet 121. The cooling liquid in the liquid source can flow into the accommodating cavity through the liquid inlet 121, so that the battery cell 200 in the accommodating cavity can be cooled, and the cooling liquid in the accommodating cavity can also be discharged to the outside of the accommodating cavity through the liquid discharge port. The battery cell immersion liquid cooling device provided in the present application can cool the battery cell 200 in the accommodating cavity, and there is a gap between the cavity wall of the accommodating cavity and the battery cell 200, that is, the gap can be filled with cooling liquid, that is, the cooling liquid can cool the six sides of the battery cell 200, which improves the uniformity of heat dissipation. Moreover, each battery cell 200 can be sleeved in the corresponding housing 110 , and there will be no contact or interference between adjacent battery cells 200 , thereby controlling the heat dissipation of a single battery cell 200 .

[0049] In some embodiments, Figures 1 to 3 As shown, a flow channel 140 is provided on the cavity wall of the accommodating cavity, and the coolant can flow along the flow channel 140. The flow channel 140 is provided on the cavity wall of the accommodating cavity, which not only forms a gap between the accommodating cavity and the battery cell 200, but also limits the flow direction of the coolant in the accommodating cavity.

[0050] Specifically, Figures 1 to 3 As shown, a plurality of flow channel grooves 140 are provided, and the plurality of flow channel grooves 140 are arranged at intervals; a guide 150 is provided on the first end cover 120 and / or the second end cover 130, and the guide 150 is used to guide the flow direction of the coolant in the accommodating cavity so that the coolant flows along a preset track. By providing the guide 150 on the first end cover 120 and the second end cover 130, the guide 150 and the flow channel groove 140 cooperate with each other, thereby allowing the coolant to flow along the preset track.

[0051] More specifically, if Figures 1 to 3As shown, there are four flow channels 140, which are the first flow channel, the second flow channel, the third flow channel and the fourth flow channel from top to bottom. Two guides 150 are provided on the first end cover 120, and the two guides 150 on the first end cover 120 are respectively located at the junction of the second flow channel and the first flow channel, and at the junction of the fourth flow channel and the third flow channel. The liquid outlet 122, the two guides 150 and the liquid inlet 121 on the first end cover 120 are arranged in sequence along the height direction, and the liquid outlet is connected to the first flow channel, and the liquid inlet 121 is connected to the fourth flow channel. One guide 150 is provided on the second end cover 130, and the guide 150 on the second end cover 130 is located at the junction of the second flow channel and the third flow channel. After the coolant in the liquid source flows into the fourth flow channel through the liquid inlet 121 , it then flows through the third flow channel, the second flow channel and the first flow channel in sequence, and is finally discharged through the drain port.

[0052] In some embodiments, Figures 1 to 3 As shown, the cell immersion liquid cooling device further includes a quick-connect plug 160, and both the liquid inlet 121 and the liquid outlet 122 are equipped with quick-connect plugs 160. By arranging quick-connect plugs 160 at both the liquid inlet 121 and the liquid outlet, it is convenient to discharge or discharge the coolant.

[0053] In some embodiments, Figures 1 to 3 As shown, the first end cover 120 is also provided with a through hole for the terminal 210 of the battery cell 200 to pass through; the battery cell immersion liquid cooling device also includes a sealing gasket 170, which is used to be sleeved on the terminal 210 and at least partially disposed in the through hole. By providing the sealing gasket 170, the sealing gasket 170 is sleeved on the terminal 210 of the battery cell 200, and the sealing gasket 170 is at least partially disposed in the through hole, closing the gap between the through hole and the terminal 210.

[0054] Specifically, the sealing gasket 170 is made of insulating material.

[0055] More specifically, if Figures 1 to 3 As shown, the battery cell immersion liquid cooling device further includes a nut 180 , which is sleeved on the terminal 210 of the battery cell 200 and is located on a side of the sealing gasket 170 facing away from the housing 110 .

[0056] As shown Figure 2 As shown, when installing the cell immersion liquid cooling device, the second sealing cover is first welded to the shell 110, and then the cell 200 is inserted, and then the first end cover 120 and the shell 110 are welded. Because the flow channel groove 140 is provided on the cavity wall of the accommodating cavity, the cell 200 and the shell 110 are separated by the flow channel groove 140 to avoid damaging the cell 200 during welding, and the terminal 210 of the cell 200 is insulated and sealed using a sealing gasket 170 and a nut 180.

[0057] Furthermore, if Figure 4 and Figure 5 As shown, the first end cap 120 and the second end cap 130 of the present application are processed by an end cap template 190. Figure 4 and Figure 5 , a schematic structural diagram of the end cover template 190 at a first viewing angle and a second viewing angle is given.

[0058] Specifically, four blind holes are provided on the end cover template 190, and three guide members 150 are provided on the inner wall surface of the end cover template 190. When the end cover template 190 needs to be processed into the first end cover 120, the four blind holes are processed into through holes, and the second guide member 150 is removed. When the end cover template 190 needs to be processed into the second end cover 130, the first guide member 150 and the third guide member 150 can be removed.

[0059] More specifically, the blind hole is 0.1 mm.

[0060] The battery cell immersion liquid cooling device provided in this application has the following beneficial effects:

[0061] 1. The six sides of the battery cell 200 can be cooled simultaneously, thus avoiding uneven cooling.

[0062] 2. The 200 different temperatures of a single battery cell can be adjusted in a targeted manner.

[0063] 3. A single battery cell 200 is encapsulated inside a single housing 110 . If a battery cell 200 fails, it can be physically isolated without affecting other battery cells 200 , which greatly improves safety.

[0064] 4. High utilization rate of coolant (refrigerant), saving coolant (refrigerant).

[0065] 5. If there is a failure in battery cell 200, the battery cell 200 can be easily replaced due to the hot-swappable connector design, thus achieving maintenance at the battery cell 200 level.

[0066] The present application also provides a battery pack, such as Figures 6 to 8 As shown, it includes a shell 300 and a plurality of battery cell immersion liquid cooling devices of any one of the above items, and the plurality of battery cell immersion liquid cooling devices are all arranged in the cavity of the shell 300.

[0067] In the battery pack, multiple battery cell immersion liquid cooling devices are installed in the cavity of the shell 300, so as to form a battery pack, thereby improving the capacity and voltage of the battery. In the battery pack provided by the present application, each battery cell 200 can be individually heat-dissipated and cooled, and the six sides of each battery cell 200 can be heat-dissipated and cooled, thereby improving the uniformity of heat dissipation.

[0068] With the rapid development of energy storage and electric technology, multi-cell 200 integrated battery packs are becoming more and more widely used. The shortcomings of battery packs on the market are as follows:

[0069] 1. The battery cell 200 is difficult to maintain. If it fails, the entire battery pack needs to be disassembled.

[0070] 2. It is difficult to locate the faulty battery cell 200. After locating the faulty battery cell 200, it is difficult to disassemble the battery cell 200.

[0071] 3. Battery cell 200 is difficult to replace and requires professional personnel to operate.

[0072] 4. Sometimes, the entire battery pack needs to be replaced just because a cell 200 fails, which is very costly.

[0073] To this end, the present application also provides a battery pack, such as Figures 6 to 8 As shown, the battery pack also includes a plurality of connecting plates 400, each battery cell immersion liquid cooling device is equipped with a connecting plate 400, and the connecting plate 400 has a first end and a second end, and the first end is rotatably connected to the outer shell 300 so that the second end can move in a direction close to or away from the outer shell 300 to close or remove the corresponding battery cell immersion liquid cooling device. By providing a plurality of connecting plates 400, each battery cell immersion liquid cooling device is equipped with a connecting plate 400, and the second end of the connecting plate 400 rotates relative to the outer shell 300, thereby closing or exposing the cavity. When the connecting plate 400 rotates to close the cavity, the corresponding battery cell immersion liquid cooling device can be sealed; when the connecting plate 400 rotates to expose the cavity, the battery cell immersion liquid cooling device corresponding to the connecting plate 400 can be taken out, thereby processing a single battery cell 200.

[0074] Specifically, Figures 6 to 8 As shown, a first end of the connecting plate 400 is connected to the housing 300 via a hinge.

[0075] Specifically, Figures 6 to 8 As shown, the battery pack also includes a magnetic lock 500 and a fixing part. The magnetic lock 500 is arranged on the second end, and the fixing part is arranged on the housing 300. When the connecting plate 400 closes the cavity, the magnetic lock 500 can be locked to the fixing part. By arranging the magnetic lock 500 and the fixing part, the magnetic lock 500 is arranged on the second end, and the fixing part is arranged on the housing 300. When the connecting plate 400 rotates to close the cavity, the magnetic lock 500 can be locked to the fixing part, thereby sealing the cavity. The magnetic lock 500 can be separated from the fixing part so that the connecting plate 400 rotates to expose the cavity.

[0076] Specifically, Figures 6 to 8As shown, the battery pack also includes a cover plate 310 connected to the outer shell 300, the cover plate 310 is located on the side of the second end of the connecting plate 400 away from the first end, the fixing piece is installed on the cover plate 310, and the magnetic lock 500 is installed on the second end. When the connecting plate 400 rotates to close the cavity, the second end and the cover plate 310 approach each other, and at this time the magnetic lock 500 can be locked to the fixing piece.

[0077] More specifically, the fixing member includes a locking opening, and a locking tongue of the magnetic lock buckle 500 can extend into the locking opening to lock the connecting plate 400 and the housing 300 .

[0078] In some embodiments, Figures 6 to 8 As shown, a liquid inlet pipe 600 and a liquid outlet pipe 700 are provided in the housing 300, the liquid inlet port 121 can be communicated with the liquid inlet pipe 600, and the liquid outlet port 122 can be communicated with the liquid outlet pipe 700. By providing the liquid inlet pipe 600, the coolant in the liquid source can flow into the receiving cavity of the battery cell immersion liquid cooling device through the liquid inlet pipe 600 and the liquid inlet port 121. By providing the drain pipe, it is convenient to discharge the coolant in the receiving cavity.

[0079] Specifically, Figures 6 to 8 As shown, the liquid inlet 121 of the battery cell immersion liquid cooling device is connected to the liquid inlet pipe 600 through the quick-connect plug 160, and the liquid discharge port of the battery cell immersion liquid cooling device is connected to the liquid discharge pipe through the quick-connect plug 160.

[0080] In some embodiments, Figures 6 to 8 As shown, the battery pack also includes an elastic member 900 disposed in the cavity, and the elastic member 900 is located between the battery cell immersion liquid cooling device and the inner bottom wall of the cavity, and the elastic member 900 can push the battery cell immersion liquid cooling device to move in the direction of extending out of the cavity through its own elastic force. By arranging the elastic member 900 between the battery cell immersion liquid cooling device and the inner bottom wall of the cavity, when the connecting plate 400 rotates to expose the cavity, the elastic member 900 can push the battery cell immersion liquid cooling device to move in the direction of extending out of the cavity through its own elastic force, so as to pop out the battery cell immersion liquid cooling device.

[0081] Specifically, the elastic member 900 is a spring, which is arranged between the first end cover 120 of the battery cell immersion liquid cooling device and the inner bottom wall of the cavity. When the connecting plate 400 rotates to close the cavity, the battery cell immersion liquid cooling device is arranged in the cavity of the shell 300, and the spring is in a compressed state. When the connecting plate 400 rotates to expose the cavity, the spring is reset, thereby pushing the battery cell immersion liquid cooling device to move in the direction of extending out of the cavity, thereby causing the battery cell immersion liquid cooling device to pop out, making it easier for the staff to extract the battery cell immersion liquid cooling device.

[0082] More specifically, the battery pack further includes a first mounting member, and the elastic member 900 is connected to the inner bottom wall of the cavity through the first mounting member.

[0083] In some embodiments, Figures 6 to 8 As shown, the battery pack further includes a copper busbar 800 , and the terminal 210 of the battery cell 200 of the battery cell immersion liquid cooling device is plugged into the copper busbar 800 .

[0084] It should be noted that the terminal 210 of the battery cell 200 includes a positive terminal 210 and a negative terminal 210 , the copper bar 800 includes a positive copper bar 800 and a negative copper bar 800 , the positive terminal 210 is plugged into the positive copper bar 800 , and the negative terminal 210 is plugged into the negative copper bar 800 .

[0085] More specifically, the battery pack further includes a second mounting member, and the copper busbar 800 is connected to the inner bottom wall of the cavity via the second mounting member.

[0086] In summary, if Figures 6 to 8 As shown, when the battery cell immersion liquid cooling device needs to be fixed, the battery cell immersion liquid cooling device is inserted from the upper end. After the insertion, the hinge, cover plate 310 and magnetic lock 500 corresponding to the battery cell immersion liquid cooling device press the battery cell immersion liquid cooling device into the cavity of the shell 300, and the quick-connect plug 160 of the battery cell immersion liquid cooling device is plugged into the liquid inlet pipe 600 and the liquid discharge pipe accordingly, and the terminal 210 of the battery cell 200 of the battery cell immersion liquid cooling device is plugged into the copper bus 800 accordingly, and then the lock tongue of the magnetic lock 500 can be extended into the locking mouth to lock the connecting plate 400 and the shell 300.

[0087] The battery pack provided in this application has the following beneficial effects:

[0088] 1. The reliability of the battery pack is improved, and the failure of a single battery cell 200 does not affect the operation of the battery pack.

[0089] 2. The 200 different temperatures of a single battery cell can be adjusted in a targeted manner.

[0090] 3. A single battery cell 200 is encapsulated inside a single housing 110 . If a battery cell 200 fails, it can be physically isolated without affecting other battery cells 200 , which greatly improves safety.

[0091] 4. If there is a failure in battery cell 200, the battery cell 200 can be easily replaced due to the hot-swappable connector design, thus achieving maintenance at the battery cell 200 level.

[0092] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0093] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A battery cell immersion liquid cooling device, characterized in that: The battery cell immersion liquid cooling device comprises: Multiple cells; A plurality of shells, each of which has a receiving cavity, the receiving cavity of each of the shells is used to receive the corresponding battery cell, and there is a gap between the cavity wall of the receiving cavity and the battery cell; A first end cover and a second end cover, each of the shells is provided with a first end cover and a second end cover, and the first end cover and the second end cover are arranged at intervals along the length direction of the shell to close the accommodating cavity; A liquid inlet and a liquid outlet, each of the first end covers is provided with the liquid inlet and the liquid outlet, the liquid inlet is used to communicate with a liquid source so that the coolant in the liquid source can flow into the accommodating cavity through the liquid inlet, and the liquid outlet is used to allow the coolant in the accommodating cavity to flow out.

2. The battery cell immersion liquid cooling device according to claim 1, characterized in that: A flow channel groove is arranged on the cavity wall of the accommodating cavity, and the cooling liquid can flow along the flow channel groove.

3. The battery cell immersion liquid cooling device according to claim 2, characterized in that: The flow channel grooves are provided in plurality, and the plurality of flow channel grooves are arranged at intervals; The first end cover and / or the second end cover is provided with a guide member, and the guide member is used to guide the flow direction of the coolant in the accommodating cavity so that the coolant flows along a preset track.

4. The battery cell immersion liquid cooling device according to claim 1, characterized in that: The first end cover is also provided with a through hole for the terminal of the battery cell to pass through; The battery cell immersion liquid cooling device further comprises a sealing gasket, which is used to be sleeved on the terminal and at least partially disposed in the through hole.

5. The battery cell immersion liquid cooling device according to claim 1, characterized in that: The battery cell immersion liquid cooling device also includes a quick-connect plug, and the liquid inlet and the liquid outlet are both equipped with the quick-connect plug.

6. A battery pack, characterized in that: It comprises a shell and a plurality of battery cell immersion liquid cooling devices according to any one of claims 1 to 5, wherein the plurality of battery cell immersion liquid cooling devices are all arranged in the cavity of the shell.

7. The battery pack according to claim 6, characterized in that: The battery pack also includes a plurality of connecting plates, each of the battery cell immersion liquid cooling devices is equipped with a connecting plate, the connecting plate having a first end and a second end, the first end being rotatably connected to the outer shell so that the second end can move toward or away from the outer shell to close or remove the corresponding battery cell immersion liquid cooling device.

8. The battery pack according to claim 7, characterized in that: The battery pack also includes a magnetic lock and a fixing member, wherein the magnetic lock is arranged on the second end, and the fixing member is arranged on the outer shell. When the connecting plate closes the cavity, the magnetic lock can be locked to the fixing member.

9. The battery pack according to claim 6, characterized in that: A liquid inlet pipe and a liquid outlet pipe are arranged in the shell, the liquid inlet port can be communicated with the liquid inlet pipe, and the liquid outlet port can be communicated with the liquid outlet pipe.

10. The battery pack according to claim 6, characterized in that: The battery pack also includes an elastic member arranged in the cavity, wherein the elastic member is located between the battery cell immersion liquid cooling device and the inner bottom wall of the cavity, and the elastic member can push the battery cell immersion liquid cooling device to move in a direction extending out of the cavity through its own elastic force.

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