Battery pack with liquid cooling heat dissipation function

Abstract

The battery pack comprises a battery cell module and an upper cover, the battery cell module comprises a lower shell, a liquid cooling plate is installed on the inner side of the lower shell, battery cell bodies are arranged on the two sides of the liquid cooling plate, heat conduction pieces are arranged between the liquid cooling plate and the battery cell bodies, and gaskets are arranged between the outer sides of the battery cell bodies and the lower shell. A liquid cooling channel is formed in each liquid cooling plate, a liquid inlet and a liquid outlet are formed in the two ends of each liquid cooling channel respectively, the liquid outlet of any liquid cooling plate is connected with the liquid inlet of the next liquid cooling plate through a series pipeline, the upper cover is mounted at the top of the battery cell module, the BMS plate is mounted on the lower side of the upper cover, and the battery cell module is mounted on the BMS plate. The battery cell bodies are electrically connected with the BMS plate, and the cooling liquid exchanges heat with the battery cell bodies on the two sides when flowing through the liquid cooling plate, so that the liquid cooling effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, in particular to a battery pack with liquid cooling and heat dissipation. Background Art

[0002] With the development of battery products, various types of high-rate charge and discharge cells are increasingly used in the battery industry. However, when charging and discharging at high rates, the cells will accumulate heat. If the generated heat is not effectively dissipated, the internal temperature of the battery will rise rapidly, thereby affecting the battery's capacity, internal resistance, power output and battery life, and even causing safety issues such as thermal runaway. Therefore, how to solve the problem of rapid heat dissipation of battery packs plays a big role in the application field of battery packs. Utility Model Content

[0003] The purpose of the utility model is to overcome the above-mentioned defects or problems existing in the background technology and provide a battery pack with liquid cooling and heat dissipation.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A battery pack with liquid cooling and heat dissipation comprises a battery cell module and an upper cover, wherein the battery cell module comprises a lower shell, a liquid cooling plate is installed on the inner side of the lower shell, battery cell bodies are arranged on both sides of the liquid cooling plate, a heat conducting sheet is arranged between the liquid cooling plate and the battery cell body, a gasket is arranged between the outer side of the battery cell body and the lower shell, a liquid cooling channel is arranged in the liquid cooling plate, and the two ends of the liquid cooling channel are respectively arranged as a liquid inlet and a liquid outlet, the number of the liquid cooling plates is at least two, the liquid outlet of any liquid cooling plate is connected to the liquid inlet of the next liquid cooling plate by a series pipe, the upper cover is installed on the top of the battery cell module, a BMS board is installed on the lower side of the upper cover, and the battery cell body is electrically connected to the BMS board.

[0006] In some embodiments of the present invention, the lower shell includes a panel and a bottom plate, and the panel and the bottom plate are connected by fasteners.

[0007] In some embodiments of the present invention, the panel, the liquid cooling plate, and the bottom plate are respectively provided with a first mounting hole, a second mounting hole, and a third mounting hole corresponding to the fasteners.

[0008] In some embodiments of the present invention, the liquid cooling plate is provided with a liquid cooling frame portion along the left side, the bottom side, and the right side, and the second mounting hole is arranged in the liquid cooling frame portion.

[0009] In some embodiments of the present invention, a top opening is formed on the upper portion of the lower shell, and the top of the battery cell body is arranged toward the upper cover.

[0010] In certain embodiments of the present invention, the BMS board is formed with a plurality of installation through grooves corresponding to the top of the battery cell body.

[0011] In certain embodiments of the utility model, the heat conductive sheet is configured as a silicone sheet, the gasket is configured as a foam pad, and the battery cell body is configured as a soft-pack battery cell.

[0012] In certain embodiments of the utility model, the battery cell module includes a first battery cell and a second battery cell, the liquid cooling plate includes a first liquid cooling part located in the first battery cell and a second liquid cooling part located in the second battery cell, and the liquid outlet of the first liquid cooling part is connected to the liquid inlet of the second liquid cooling part through a series pipe.

[0013] In some embodiments of the present invention, the first battery cell and the second battery cell are arranged side by side, and the first battery cell and the second battery cell are connected via a connecting member.

[0014] From the above description of the utility model, it can be seen that compared with the prior art, the utility model has the following beneficial effects:

[0015] The coolant is allowed to exchange heat with each battery cell through the liquid cooling plate and the series pipes between the liquid cooling plates, thereby achieving liquid cooling of the battery cell body, effectively preventing the battery cell body from continuously heating up and affecting the battery capacity, internal resistance, power output and battery life. When the ternary soft-pack battery cell is charged and discharged at a high rate, heat accumulation is not likely to occur. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 This is a schematic diagram of the installation of the upper cover of the utility model;

[0019] Figure 3 This is a schematic diagram of the installation of the lower housing of the utility model;

[0020] Figure 4 It is a schematic diagram of the liquid cooling plate of the utility model;

[0021] Description of main reference numerals:

[0022] 1. Upper cover, 2. Lower shell, 20. Panel, 21. Bottom plate, 22. Fastener, 23. First mounting hole, 24. Second mounting hole, 25. Third mounting hole, 26. Shell frame, 3. Liquid cooling plate, 30. Liquid cooling channel, 31. Liquid inlet, 32. Liquid outlet, 33. Liquid cooling frame, 4. Battery body, 5. Heat conducting sheet, 6. Gasket, 7. Series pipe, 8. BMS board, 80. Mounting groove, 91. First battery cell, 92. Second battery cell, 93. First liquid cooling part, 94. Second liquid cooling part, 95. Connector. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are preferred embodiments of the utility model and should not be regarded as excluding other embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0024] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" etc. is to distinguish different objects rather than to describe a specific order.

[0025] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise explicitly defined, directional words, such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise", etc., indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the specific protection scope of the invention.

[0026] In the claims, specification and the above drawings of the utility model, unless otherwise clearly defined, if the term "fixed connection" or "fixed connection" is used, it should be understood in a broad sense, that is, any connection method without a displacement relationship and relative rotation relationship between the two, that is to say, including non-detachable fixed connection, detachable fixed connection, integrated connection and fixed connection through other devices or elements.

[0027] In the claims, specification and drawings of the present utility model, if the terms "include", "have" and their variations are used, they are intended to mean "including but not limited to".

[0028] Example 1, see Figure 1-4 :

[0029] A battery pack with liquid cooling comprises a battery cell module and an upper cover 1, wherein the battery cell module is mounted on the lower side of the upper cover 1.

[0030] The battery cell module includes a lower shell 2, a liquid cooling plate 3 is installed on the inner side of the lower shell 2, battery cells 4 are arranged on both sides of the liquid cooling plate 3, a heat conducting sheet 5 is arranged between the liquid cooling plate 3 and the battery cell body 4, and a pad 6 is arranged between the outer side of the battery cell body 4 and the lower shell 2 to play a shock absorbing role.

[0031] As an implementation manner, the heat conductive sheet 5 is configured as a silicone sheet, the gasket 6 is configured as a foam pad, and the battery cell body 4 is configured as a soft-pack battery cell.

[0032] As an implementation manner, the lower shell 2 includes a panel 20 and a bottom plate 21, and the panel 20 and the bottom plate 21 are connected by a fastener 22. Preferably, the fastener 22 is a bolt.

[0033] As an embodiment, the panel 20 is provided with a first mounting hole 23 corresponding to the fastener 22, the liquid cooling plate 3 is provided with a second mounting hole 24 corresponding to the fastener 22, and the base plate 21 is provided with a third mounting hole 25 corresponding to the fastener 22. The fastener 22 is sequentially inserted into the first mounting hole 23, the second mounting hole 24, and the third mounting hole 25 to realize the connection between the panel 20, the liquid cooling plate 3 and the base plate 21.

[0034] The liquid cooling channel 30 is provided in the liquid cooling plate 3, and the two ends of the liquid cooling channel 30 are respectively provided with a liquid inlet 31 and a liquid outlet 32. The total number of the liquid cooling plates 3 in the battery pack is at least two, and the liquid outlet 32 ​​of any liquid cooling plate 3 is connected to the liquid inlet 31 of the next liquid cooling plate 3 through a series pipe 7. Preferably, the liquid cooling channel 30 is arranged in a serpentine shape, and the liquid inlet 31 and the liquid outlet 32 ​​are located on the same side. The series pipe 7 is used to connect adjacent liquid cooling plates 3. During use, the coolant enters the liquid cooling plate 3 at the head end through the liquid inlet 31, flows through each liquid cooling plate 3 through the series pipe 7, and finally flows out from the liquid outlet 32 ​​of the liquid cooling plate 3 at the end, so that the coolant exchanges heat with each battery body 4, realizes liquid cooling of the battery body 4, and effectively prevents the battery body 4 from continuously heating up and affecting the capacity, internal resistance, power output and battery life of the battery.

[0035] As an embodiment, the liquid cooling plate 3 is provided with a liquid cooling frame portion 33 along the left side, the bottom side, and the right side, and the second mounting hole is arranged in the liquid cooling frame portion 33. Further, the panel 20 and the bottom plate 21 are respectively provided with a shell frame portion 26 corresponding to the liquid cooling frame portion 33, and the first mounting hole 23 and the third mounting hole 25 are respectively located in the corresponding shell frame portion 26, so that an accommodation space for accommodating the battery cell body 4 is formed between the panel 20 and the liquid cooling plate 3, and between the bottom plate 21 and the liquid cooling plate 3. When there are multiple liquid cooling plates 3 in the battery cell module, the liquid cooling frame portion 33 also provides an accommodation space for accommodating the battery cell body 4 between the liquid cooling plates 3. The thermal conductive sheet 5 is arranged in the installation area inside the liquid cooling frame portion 33, and the gasket 6 is arranged in the placement area inside the shell frame portion 26.

[0036] The upper cover 1 is installed on the top of the battery cell module, a BMS board 8 is installed on the lower side of the upper cover 1 , and the battery cell body 4 is electrically connected to the BMS board 8 .

[0037] Preferably, the number of the upper cover 1 and the BMS board 8 are both set to one, while the number of the battery cell modules can be one or more. Specifically, when the number of the battery cell module is one, the number of the liquid cooling plates 3 in the battery cell module is at least two, and the adjacent liquid cooling plates 3 are connected by a series pipe 7. When the number of the battery cell modules is multiple, the upper cover 1 and the BMS board 8 of corresponding specifications are selected according to the number of the battery cell modules, and the number of the liquid cooling plates 3 in any battery cell module can be one or more.

[0038] As an implementation manner, a top opening is formed on the upper portion of the lower shell 2 , and the top of the top battery cell body 4 is arranged toward the upper cover 1 .

[0039] Furthermore, the top of the top cell body 4 has a protruding top opening, and the BMS board 8 is formed with a plurality of installation grooves 80 corresponding to the top of the cell body 4, which facilitates the installation of the BMS board 8 and helps save installation space.

[0040] As an embodiment, the battery module includes a first battery cell 91 and a second battery cell 92, the liquid cooling plate 3 includes a first liquid cooling part 93 located in the first battery cell 91 and a second liquid cooling part 94 located in the second battery cell 92, and the liquid outlet 32 ​​of the first liquid cooling part 93 is connected to the liquid inlet 31 of the second liquid cooling part 94 through the series pipe 7. The liquid inlet 31 of the first liquid cooling part 93 and the liquid outlet 32 ​​of the second liquid cooling part 94 are respectively connected to the liquid cooling circulation device.

[0041] As an embodiment, a plurality of battery modules are arranged side by side, preferably, the first battery cell 91 and the second battery cell 92 are arranged side by side, and the first battery cell 91 and the second battery cell 92 are fixedly connected by a connector 95. The connector 95 is a long screw, and the number of the long screws is 6 and evenly distributed on both sides of the lower housing 2.

[0042] Embodiment 2:

[0043] Example 1 is repeated, but temperature sensors are arranged between the liquid cooling circulation device and the liquid inlet 31 of the liquid cooling plate 3, between the series pipe 7, and between the liquid outlet 32 ​​of another liquid cooling plate 3 and the liquid cooling circulation device, and the temperature sensors are used for liquid cooling temperature detection.

[0044] Embodiment 3:

[0045] The first embodiment is repeated, but the liquid cooling plate 3 is not provided with the liquid cooling frame portion 33 , and the liquid cooling plate 3 is installed inside the lower housing 2 .

[0046] As an embodiment, the lower shell 2 includes a panel 20 and a base plate 21, the base plate 21 is provided with a lower frame portion along the left side, bottom side and right side, the lower frame portion is arranged toward the panel 20, the panel 20 is provided with an upper frame portion corresponding to the lower frame portion and facing the base plate 21, and an installation groove for installing the liquid cooling plate 3 is provided at the connection between the lower frame portion and the upper frame portion, and a pipeline through hole is opened in the installation groove corresponding to the liquid inlet 31 and the liquid outlet 32.

[0047] Embodiment 4:

[0048] Repeat Example 1, but the bottom plate 21 or the panel 20 is provided with a coolant inlet, and the coolant inlet is connected to the liquid inlet 31 of the adjacent liquid cooling plate 3. Preferably, the coolant inlet is provided on the bottom plate 21, and the bottom plate 21 is provided with an inner channel, one end of the inner channel is connected to the coolant inlet, and the other end of the inner channel is provided with a connecting port, which is connected to the liquid inlet 31 of the adjacent liquid cooling plate 3, and a sealing ring is provided between the connecting port and the liquid inlet 31 of the adjacent liquid cooling plate 3. It can be understood that the liquid inlet 31 is arranged toward the connecting port. As an embodiment, the inner channel is also arranged in a serpentine shape, so that the bottom plate 21 also plays a role in liquid cooling.

[0049] The description of the above specification and embodiments is used to explain the protection scope of the utility model, but does not constitute a limitation on the protection scope of the utility model. Through the enlightenment of the utility model or the above embodiments, ordinary technicians in this field can obtain modifications, equivalent replacements or other improvements to the embodiments of the utility model or part of the technical features thereof through logical analysis, reasoning or limited experiments, which should be included in the protection scope of the utility model.

Claims

1. A battery pack with liquid cooling, characterized in that: It includes a battery cell module and an upper cover. The battery cell module includes a lower shell. A liquid cooling plate is installed on the inner side of the lower shell. Battery cells are arranged on both sides of the liquid cooling plate. A heat conducting sheet is arranged between the liquid cooling plate and the battery cell body. A gasket is arranged between the outer side of the battery cell body and the lower shell. A liquid cooling channel is arranged in the liquid cooling plate. The two ends of the liquid cooling channel are respectively arranged as a liquid inlet and a liquid outlet. The liquid outlet of any liquid cooling plate is connected to the liquid inlet of the next liquid cooling plate through a series pipe. The upper cover is installed on the top of the battery cell module. A BMS board is installed on the lower side of the upper cover. The battery cell body is electrically connected to the BMS board.

2. A battery pack with liquid cooling according to claim 1, characterized in that: The lower shell includes a panel and a bottom plate, and the panel and the bottom plate are connected by fasteners.

3. A battery pack with liquid cooling according to claim 2, characterized in that: The panel, the liquid cooling plate and the bottom plate are respectively provided with a first mounting hole, a second mounting hole and a third mounting hole corresponding to the fasteners.

4. A battery pack with liquid cooling according to claim 3, characterized in that: The liquid cooling plate is provided with a liquid cooling frame portion along the left side, the bottom side and the right side, and the second mounting hole is arranged in the liquid cooling frame portion.

5. A battery pack with liquid cooling according to claim 2, characterized in that: A top opening is formed on the upper portion of the lower shell, and the top of the battery cell body is arranged toward the upper cover.

6. A battery pack with liquid cooling according to claim 5, characterized in that: The BMS board is formed with a plurality of mounting grooves corresponding to the top of the battery cell body.

7. A battery pack with liquid cooling according to claim 1, characterized in that: The heat conducting sheet is configured as a silicone sheet, the gasket is configured as a foam pad, and the battery cell body is configured as a soft-pack battery cell.

8. A battery pack with liquid cooling according to any one of claims 1 to 7, characterized in that: The battery cell module includes a first battery cell and a second battery cell, the liquid cooling plate includes a first liquid cooling part located in the first battery cell and a second liquid cooling part located in the second battery cell, and the liquid outlet of the first liquid cooling part is connected to the liquid inlet of the second liquid cooling part through a series pipe.

9. A battery pack with liquid cooling according to claim 8, characterized in that: The first battery cell and the second battery cell are arranged side by side, and the first battery cell and the second battery cell are connected via a connecting member.

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