Water cooling structure of battery module and battery pack

Abstract

The utility model discloses a water cooling structure of a battery module and a battery pack, the water cooling structure comprises a first protective plate, the first protective plate is arranged below the battery module and is connected with the bottom surface of the battery module, and a first cooling flow channel is arranged in the first protective plate; the two second protective plates are respectively arranged at the opposite ends of the battery module and are connected with the end surface of the battery module, and second cooling flow channels are formed in the second protective plates; a water inlet connector and a water outlet connector are arranged at the two ends of the first protection plate and communicate with the first cooling flow channel and the second cooling flow channel at the same time. According to the utility model, the first cooling flow channel is arranged so as to facilitate heat dissipation of the bottom of the battery module, and the second cooling flow channel is arranged so as to facilitate heat dissipation of the side surface of the battery module. Therefore, simultaneous heat dissipation of the bottom surface and the side surface of the battery module is realized, the heat dissipation efficiency of the battery module is improved, the service life of the battery is prolonged, and the safety of the battery is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a water cooling structure of a battery module and a battery pack. Background Art

[0002] With the development of new energy vehicles, the capacity of battery modules is getting larger and larger, and the heat of the battery is also increasing. Therefore, a cooling device needs to be set up to dissipate heat from the battery.

[0003] For example, the invention patent with publication number "CN117790983A" discloses a liquid-cooled battery box comprising: a battery cell, provided with a top, a bottom opposite to the top in the vertical direction, and a first side surface and a second side surface between the top and the bottom, wherein the area of ​​the first side surface is greater than the area of ​​the second side surface; a box body, which can be used to accommodate the battery cell; a liquid cooling plate, which is opposite to the first side surface of the battery cell; a liquid cooling pipe, which is used to transport cooling liquid to the liquid cooling plate, and the liquid cooling pipe is arranged at the bottom of the box body.

[0004] However, in the above-mentioned invention patent, liquid cooling tubes are only provided at the bottom of the battery cell for heat dissipation, and the sides of the battery cell cannot dissipate heat at the same time. Summary of the Invention

[0005] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to propose a water-cooling structure for a battery module and a battery pack, so as to solve the problem that the battery side cannot dissipate heat in the prior art.

[0006] The technical solution adopted by the utility model to solve the technical problem is a water cooling structure for a battery module, comprising:

[0007] a first guard plate, the first guard plate being disposed below the battery module and connected to a bottom surface of the battery module, and a first cooling channel being disposed in the first guard plate;

[0008] two second guard plates, the two second guard plates being respectively arranged at opposite ends of the battery module and connected to the end surface of the battery module, the second guard plates being provided with second cooling channels;

[0009] A water inlet joint and a water outlet joint are provided at both ends of the first guard plate, and the water inlet joint and the water outlet joint are simultaneously connected to the first cooling channel and the second cooling channel.

[0010] Furthermore, the first guard plate includes a first bottom plate and a second bottom plate, the two sides of the first bottom plate are connected to the two sides of the second bottom plate, and the first cooling channel is formed between the first bottom plate and the second bottom plate; the first bottom plate is connected to the bottom surface of the battery module.

[0011] Furthermore, first extension plates are respectively provided on both sides of the first bottom plate, second extension plates are respectively provided on both sides of the second bottom plate, and the first extension plates are fixedly connected to the second extension plates.

[0012] Furthermore, the first extension plate is welded and fixed to the second extension plate, a plurality of first through holes are provided on the first extension plate, a plurality of second through holes are provided on the second extension plate, and the first through holes are aligned with the second through holes.

[0013] Furthermore, the second guard plate includes:

[0014] A first side plate and a second side plate form the second cooling channel between the first side plate and the second side plate, and the first side plate is connected to the end surface of the battery module.

[0015] Furthermore, the third base plate has its two sides connected to the first side plate and the second side plate respectively, and the third base plate is connected to the first guard plate. The third base plate is provided with a water inlet hole and a water outlet hole communicating with the second cooling channel, the water inlet joint extends into the water inlet hole and communicates with the first cooling channel, and the water outlet joint extends into the water outlet hole and communicates with the first cooling channel.

[0016] Furthermore, a first sealing ring is provided between the water inlet and the water inlet joint, and a second sealing ring is provided between the water outlet and the water outlet joint.

[0017] Furthermore, a plurality of reinforcing ribs are provided between the first side plate and the second side plate.

[0018] Furthermore, the battery module includes a plurality of battery cells arranged along the length direction, the bottom surface of each battery cell is connected to the first protective plate, and the two outermost battery cells are respectively connected to one of the second protective plates.

[0019] Furthermore, a cable tie is also included, and the cable tie is wrapped around the multiple battery cells and the two second guard plates at the same time.

[0020] Furthermore, a water inlet and a water outlet are provided on the first guard plate, and both the water outlet and the water inlet are communicated with the first cooling channel.

[0021] Furthermore, a battery pack is disclosed, comprising a water-cooling structure for one or more battery modules.

[0022] Compared with the prior art, the present invention has at least the following beneficial effects:

[0023] (1) A first protective plate is provided below the battery module, and a first cooling channel is provided within the first protective plate to dissipate heat from the bottom of the battery module. A second protective plate is provided on each side of the battery module, and a second cooling channel is provided within the second protective plate to dissipate heat from the sides of the battery module. This achieves simultaneous heat dissipation from both the bottom and sides of the battery module, improving the heat dissipation efficiency of the battery module, extending the battery life, and enhancing battery safety.

[0024] (2) The first cooling channel and the second cooling channel are connected. It is only necessary to pass the coolant into the first protective plate or the second protective plate so that the coolant can flow through the first cooling channel and the second cooling channel at the same time, thereby reducing costs while achieving simultaneous heat dissipation from the bottom surface and end surface of the battery module.

[0025] (3) A plurality of first through holes are provided on the first extension plate, and a plurality of second through holes are provided on the second extension plate, and the first through holes are aligned with the second through holes, so that when welding between the first extension plate and the second extension plate, the first through holes and the second through holes can discharge gas, thereby avoiding welding bulges, improving welding quality, and further enhancing the sealing between the first base plate and the second base plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of the water cooling structure and battery module in the embodiment;

[0027] Figure 2 Schematic diagram of the structure of the first guard plate in the embodiment;

[0028] Figure 3 Schematic diagram of the structure of the first cooling channel in the embodiment;

[0029] Figure 4 This is a schematic structural diagram of the first base plate in the embodiment;

[0030] Figure 5 Schematic diagram of the structure of the second bottom plate in the embodiment;

[0031] Figure 6 2. It is a structural schematic diagram of the second guard plate from one perspective in the embodiment;

[0032] Figure 7 is a structural schematic diagram of the second guard plate from another perspective in the embodiment;

[0033] In the picture:

[0034] 100, first guard plate; 101, blocking block; 102, water inlet; 103, water outlet; 104, water inlet connector; 105, water outlet connector; 106, first cooling channel; 107, first sealing ring; 108, second sealing ring; 110, first base plate; 111, first extension plate; 112, first through hole; 120, second base plate; 121, second extension plate; 122, second through hole;

[0035] 200, second guard plate; 201, water inlet; 202, water outlet; 203, second cooling channel; 210, first side plate; 220, second side plate; 230, third bottom plate; 240, reinforcing rib;

[0036] 300, cable tie;

[0037] 400, battery cell. DETAILED DESCRIPTION

[0038] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0039] Please refer to Figure 1-Figure 7 The utility model discloses a water cooling structure for a battery module, comprising:

[0040] a first guard plate 100 , which is disposed below the battery module and in contact with the bottom surface of the battery module, and a first cooling channel 106 is disposed within the first guard plate 100 ;

[0041] Two second guard plates 200 , the two second guard plates 200 are respectively disposed at opposite ends of the battery module and connected to the end surface of the battery module, and the second cooling channels 203 are disposed on the second guard plates 200 ;

[0042] A water inlet joint 104 and a water outlet joint 105 are provided at both ends of the first guard plate 100 , and the water inlet joint 104 and the water outlet joint 105 are simultaneously connected to the first cooling channel 106 and the second cooling channel 203 .

[0043] Specifically, the present invention provides a first shield 100 below the battery module, with a first cooling channel 106 disposed therein to dissipate heat from the bottom of the battery module. Furthermore, a second shield 200 is disposed on either side of the battery module, each containing a second cooling channel 203 to dissipate heat from the sides of the battery module. This achieves simultaneous heat dissipation from both the bottom and sides of the battery module, improving the module's heat dissipation efficiency, extending the battery's service life, and enhancing battery safety.

[0044] At the same time, since the water inlet joint 104 and the water outlet joint 105 provided on the first guard plate 100 are simultaneously connected to the first cooling channel 106 and the second cooling channel 203, that is, the first cooling channel 106 and the second cooling channel 203 are connected, it is only necessary to pass the coolant into the first guard plate 100 or the second guard plate 200, so that the coolant can flow through the first cooling channel 106 and the second cooling channel 203 at the same time, so as to reduce costs while achieving simultaneous heat dissipation of the bottom surface and end surface of the battery module.

[0045] It should be noted that the first protective plate is in contact with the bottom surface of the battery module, and the second protective plate is in contact with the end surface of the battery module. The term "in contact" can be understood as direct or indirect contact between the two surfaces. The two surfaces can be directly attached, or aerogel or thermally conductive adhesive can be placed between the two surfaces to facilitate heat dissipation from the battery module through the first and second protective plates.

[0046] Furthermore, the first protective plate 100 includes a first base plate 110 and a second base plate 120, the two sides of the first base plate 110 are connected to the two sides of the second base plate 120, and the first cooling channel 106 is formed between the first base plate 110 and the second base plate 120; the first base plate 110 is connected to the bottom surface of the battery module.

[0047] Specifically, the two sides of the first base plate 110 are fixed to the two sides of the second base plate 120, with a gap between the first base plate 110 and the second base plate 120, thereby forming the first cooling channel 106. At the same time, the first base plate 110 is connected to the bottom surface of the battery module. The heat of the battery module is transferred to the coolant through the first base plate 110. When the coolant circulates in the first cooling channel 106, it can dissipate the heat of the battery module, thereby achieving heat dissipation of the battery module.

[0048] Furthermore, first extension plates 111 are respectively provided on both sides of the first bottom plate 110 , and second extension plates 121 are respectively provided on both sides of the second bottom plate 120 . The first extension plates 111 and the second extension plates 121 are fixedly connected.

[0049] Specifically, by connecting the first extension plate 111 and the second extension plate 121 on both sides, the contact area between the first base plate 110 and the second base plate 120 can be effectively increased, thereby improving the connection strength and sealing of the first base plate 110 and the second base plate 120, and preventing the coolant from flowing out from between the first base plate 110 and the second base plate 120.

[0050] Furthermore, a sealing block 101 is provided at each end of the first guard plate 100 to seal the end of the first guard plate 100 to prevent the coolant from flowing out.

[0051] Furthermore, the first extension plate 111 and the second extension plate 121 are welded and fixed, the first extension plate 111 is provided with a plurality of first through holes 112 , the second extension plate 121 is provided with a plurality of second through holes 122 , and the first through holes 112 are aligned with the second through holes 122 .

[0052] Specifically, a plurality of first through holes 112 are opened on the first extension plate 111, and a plurality of second through holes 122 are opened on the second extension plate 121, and the first through holes 112 are aligned with the second through holes 122, so that when welding between the first extension plate 111 and the second extension plate 121, the first through holes 112 and the second through holes 122 can discharge gas, avoid welding bulging, improve welding quality, and thereby enhance the sealing between the first base plate 110 and the second base plate 120.

[0053] Furthermore, the second guard plate 200 includes:

[0054] A first side plate 210 and a second side plate 220 , wherein the second cooling channel 203 is formed between the first side plate 210 and the second side plate 220 , and the first side plate 210 is connected to the end surface of the battery module;

[0055] The third bottom plate 230 has its two sides connected to the first side plate 210 and the second side plate 220 respectively, and the third bottom plate 230 is connected to the first guard plate 100. The third bottom plate 230 is provided with a water inlet hole 201 and a water outlet hole 202 communicating with the second cooling channel 203. The water inlet joint 104 extends into the water inlet hole 201 and communicates with the first cooling channel 106. The water outlet joint 105 extends into the water outlet hole 202 and communicates with the first cooling channel 106.

[0056] Specifically, a water inlet hole 201 and a water outlet hole 202 are provided on the third bottom plate 230 , the water inlet connector 104 extends into the water inlet hole 201 , and the water outlet connector 105 extends into the water outlet hole 202 , thereby achieving communication between the first cooling channel 106 and the second cooling channel 203 .

[0057] Furthermore, a first sealing ring 107 is provided between the water inlet hole 201 and the water inlet joint 104, and a second sealing ring 108 is provided between the water outlet hole 202 and the water outlet joint 105. This improves the sealing between the water outlet joint 105 and the water outlet hole 202 and between the water inlet hole 201 and the water inlet joint 104 to prevent coolant leakage.

[0058] Furthermore, a plurality of reinforcing ribs 240 are provided between the first side plate 210 and the second side plate 220 .

[0059] A reinforcing rib 240 is provided between the first side plate 210 and the second side plate 220 to enhance the connection strength between the first side plate 210 and the second side plate 220 .

[0060] Furthermore, the battery module includes a plurality of battery cells 400 arranged along the length direction, the bottom surface of each battery cell 400 is connected to the first protective plate 100, and the two outermost battery cells 400 are respectively connected to one of the second protective plates 200.

[0061] Furthermore, the cross-sectional area of ​​the second protective plate 200 is greater than or equal to the cross-sectional area of ​​the battery cell 400, so that all areas on the side wall of the battery cell 400 can contact the second protective plate 200, thereby increasing the contact area between the battery cell 400 and the second protective plate 200, thereby improving the heat dissipation efficiency of the battery cell 400.

[0062] Furthermore, a cable tie 300 is included, and the cable tie 300 is wrapped around the multiple battery cells 400 and the two second protective plates 200 at the same time.

[0063] Specifically, the cable tie 300 is a rectangular structure connected end to end, which can effectively restrain the battery cell 400 and the second protective plate 200, so that the second protective plate 200 is connected to the outermost battery cell 400, thereby playing a fixing role.

[0064] Furthermore, a water inlet 102 and a water outlet 103 are provided on the first guard plate 100 , and both the water outlet 103 and the water inlet 102 are in communication with the first cooling channel 106 .

[0065] Specifically, the water inlet 102 and the water outlet 103 are connected to external pipes to achieve circulation of the coolant in the first cooling channel 106 and the second cooling channel 203 .

[0066] The present application also discloses a battery pack comprising a water-cooling structure of one or more battery modules.

[0067] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0068] In addition, terms such as "first," "second," and "an" in this utility model are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0069] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0070] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

Claims

1. A water cooling structure for a battery module, characterized in that: include: a first guard plate, the first guard plate being disposed below the battery module and connected to a bottom surface of the battery module, and a first cooling channel being disposed in the first guard plate; two second guard plates, the two second guard plates being respectively arranged at opposite ends of the battery module and connected to the end surface of the battery module, the second guard plates being provided with second cooling channels; A water inlet joint and a water outlet joint are provided at both ends of the first guard plate, and the water inlet joint and the water outlet joint are simultaneously connected to the first cooling channel and the second cooling channel.

2. The water cooling structure of a battery module according to claim 1, characterized in that: The first guard plate includes a first bottom plate and a second bottom plate, two sides of the first bottom plate are connected to two sides of the second bottom plate, and the first cooling channel is formed between the first bottom plate and the second bottom plate; the first bottom plate is connected to the bottom surface of the battery module.

3. The water cooling structure of a battery module according to claim 2, characterized in that: First extension plates are respectively provided on both sides of the first bottom plate, second extension plates are respectively provided on both sides of the second bottom plate, and the first extension plates are fixedly connected to the second extension plates.

4. The water cooling structure of a battery module according to claim 3, characterized in that: The first extension plate is welded and fixed to the second extension plate. The first extension plate is provided with a plurality of first through holes, the second extension plate is provided with a plurality of second through holes, and the first through holes are aligned with the second through holes.

5. The water cooling structure of a battery module according to claim 1, characterized in that: The second guard plate comprises: A first side plate and a second side plate form the second cooling channel between the first side plate and the second side plate, and the first side plate is connected to the end surface of the battery module.

6. The water cooling structure of a battery module according to claim 5, characterized in that: The second guard plate further comprises: The third base plate, both sides of the third base plate are respectively connected to the first side plate and the second side plate, and the third base plate is connected to the first guard plate, and the third base plate is provided with a water inlet hole and a water outlet hole communicating with the second cooling channel, the water inlet joint extends into the water inlet hole and communicates with the first cooling channel, and the water outlet joint extends into the water outlet hole and communicates with the first cooling channel.

7. The water cooling structure of a battery module according to claim 6, characterized in that: A first sealing ring is provided between the water inlet and the water inlet joint, and a second sealing ring is provided between the water outlet and the water outlet joint.

8. The water cooling structure of a battery module according to claim 5, characterized in that: A plurality of reinforcing ribs are provided between the first side plate and the second side plate.

9. The water cooling structure of a battery module according to claim 1, characterized in that: The battery module includes a plurality of battery cells arranged along the length direction, the bottom surface of each battery cell is connected to the first protective plate, and the two outermost battery cells are respectively connected to one of the second protective plates.

10. The water cooling structure of a battery module according to claim 9, characterized in that: Also included is a cable tie, which is wrapped around the multiple battery cells and the two second guard plates at the same time.

11. The water cooling structure of a battery module according to claim 1, characterized in that: A water inlet and a water outlet are also provided on the first guard plate, and both the water outlet and the water inlet are communicated with the first cooling channel.

12. A battery pack, characterized in that: A water cooling structure comprising one or more battery modules according to any one of claims 1 to 11.

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